WO2007122930A1 - コアシェル型シリカおよびその製造方法 - Google Patents
コアシェル型シリカおよびその製造方法 Download PDFInfo
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- WO2007122930A1 WO2007122930A1 PCT/JP2007/055442 JP2007055442W WO2007122930A1 WO 2007122930 A1 WO2007122930 A1 WO 2007122930A1 JP 2007055442 W JP2007055442 W JP 2007055442W WO 2007122930 A1 WO2007122930 A1 WO 2007122930A1
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- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
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- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
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- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
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- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28004—Sorbent size or size distribution, e.g. particle size
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28016—Particle form
- B01J20/28019—Spherical, ellipsoidal or cylindrical
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/281—Sorbents specially adapted for preparative, analytical or investigative chromatography
- B01J20/282—Porous sorbents
- B01J20/283—Porous sorbents based on silica
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3291—Characterised by the shape of the carrier, the coating or the obtained coated product
- B01J20/3293—Coatings on a core, the core being particle or fiber shaped, e.g. encapsulated particles, coated fibers
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/3045—Treatment with inorganic compounds
- C09C1/3054—Coating
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/3063—Treatment with low-molecular organic compounds
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/309—Combinations of treatments provided for in groups C09C1/3009 - C09C1/3081
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
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- C01P2004/04—Particle morphology depicted by an image obtained by TEM, STEM, STM or AFM
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- C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
- C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
- C01P2004/84—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases one phase coated with the other
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- C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
- C01P2004/84—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases one phase coated with the other
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- C01P2006/14—Pore volume
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2991—Coated
- Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
Definitions
- the present invention relates to a core-shell type silica and a method for producing the same.
- Porous silica is used as a packing material for liquid chromatography, a shape selective catalyst, a material for adsorption / separation of various ions, a matting material for paint, and the like.
- the porous silica is required to have low liquid feeding resistance and high separation efficiency.
- the particle diameter of the porous silica may be increased.
- the particle size of the porous silica it takes time until the substance to be separated adsorbed on the porous silica and reaches the center of the porous silica is released from the porous silica. Efficiency is lowered.
- the particle size of the porous silica is reduced in order to increase the separation efficiency, the liquid feeding resistance increases.
- a core-shell type silica in which the surface of nonporous silica core particles is covered with a shell made of porous silica.
- the core-shell type silica has nonporous silica core particles in the center, the substance to be separated adsorbed on the core-shell type silica stays in the shell near the surface. Therefore, the separation efficiency is high because the time until the substance to be separated is adsorbed on the core-shell type silica and the force is released is short. Further, if the silica core particles are made larger, the particle diameter of the core-shell type silica can be increased while suppressing the thickness of the shell, so that the liquid feeding resistance can be reduced without lowering the separation efficiency.
- core-shell type silica obtained by the following method is known.
- a step of producing a gel method amorphous silica by neutralizing an aqueous alkaline acid solution and an aqueous mineral acid solution under conditions of PH2 ⁇ : LO, a step of wet pulverizing the gel method amorphous silica, and wet pulverization In the presence of the prepared gel method amorphous silica particles, and a step of neutralizing under conditions of pH 5 to 9 and precipitating precipitated amorphous silica particles on the surface of the gel amorphous silica particles (Patent Document 1).
- the gel-processed amorphous silica particles that have been wet-pulverized are not spherical but irregular-shaped particles, and have a wide particle size distribution. Therefore, the core-shell type silica obtained by precipitating the precipitated amorphous silica particles on the surface of the gel amorphous silica particles also has a low sphericity and a wide particle size distribution.
- the core-shell type silica is used as a packing material for liquid chromatography, the sphericity is low, so that there is a problem that packing property to the column for liquid chromatography is poor.
- a porous shell formed by precipitating precipitated amorphous silica particles on the surface of gel amorphous silica particles is a packing material for liquid chromatography with low thickness uniformity.
- Patent Document 1 Japanese Patent No. 3500305
- the present invention provides a core-shell type silica having a high sphericity and a narrow particle size distribution, and a production method capable of easily producing the core-shell type silica.
- the present invention has the following gist.
- Substantially non-porous silica core particles having a sphericity of 0.8 or more and a coefficient of variation of 0.2 or less are used as an alcohol and hydraulic dispersion medium in the presence of a surfactant.
- (6) a substantially non-porous silica core particle having a sphericity of 0.8 or more and a coefficient of variation of 0.2 or less;
- a core-shell type silica having a shell made of porous silica covering the surface of the silica core particles, having a sphericity of 0.8 or more and a coefficient of variation of 0.2 or less.
- the core-shell type silica according to the above (6) which has an average pore diameter: 2 to 50 nm, a pore volume: 0.05 to 2 mLZg, and a specific surface area: 50 to 1000 m 2Zg.
- the core-shell type silica of the present invention has a high sphericity and a narrow particle size distribution.
- core-shell type silica having a high sphericity and a narrow particle size distribution can be easily produced.
- FIG. 1 is an SEM photograph of core-shell type silica when a shell is formed under conditions where the concentration of silica core particles (in terms of surface area) is low.
- FIG. 2 is an SEM photograph of the silica core particles used in Example 1.
- FIG. 3 is an SEM photograph of the core-shell type silica obtained in Example 1.
- FIG. 4 is a TEM photograph of a cross section of the core-shell type silica obtained in Example 1.
- mold silica of this invention has the following processes.
- (b) A step of adding a silica raw material to the dispersion and reacting the silica raw material under conditions of pH 8 to 13 to form a shell precursor containing silica and a surfactant on the surface of the silica core particles.
- the dispersion is prepared by dispersing silica core particles in a mixture containing alcohol, water and a surfactant.
- Silica core particles are substantially non-porous silica having a sphericity of 0.8 or more and a coefficient of variation of 0.2 or less.
- the substantially non-porous means that the specific surface area of the silica core particles measured by nitrogen gas adsorption method is 5 Om 2 / g or less.
- the specific surface area of the silica core particles is preferably 30 m 2 / g or less.
- the sphericity of the silica core particles is 0.8 or more, preferably 0.9 or more.
- core-shell type silica having a sphericity of 0.8 or more can be obtained.
- the silica core particles are observed with a scanning electron microscope (SEM), 100 particles are randomly selected, and the major axis and minor axis of each silica core particle are measured to determine the sphericity (minor axis Z major axis). It is a value obtained by averaging the sphericity of 100 silica core particles.
- SEM scanning electron microscope
- the coefficient of variation of the silica core particles is 0.2 or less, preferably 0.15 or less.
- a core-shell type silica having a coefficient of variation of 0.2 or less, that is, a narrow particle size distribution can be obtained.
- the coefficient of variation is obtained as follows.
- the silica core particles are observed with a scanning electron microscope (SEM), 100 particles are randomly selected, the particle diameter of each silica core particle is measured, and the standard deviation of the particle size distribution and the number average particle diameter are obtained. Obtain the coefficient of variation from the equation.
- the number average particle diameter of the silica core particles is preferably 0.1 to LOO ⁇ m, more preferably 0.3 to 50 ⁇ m.
- L m By setting the number average particle diameter of the silica core particles to 0 .: L m or more, it becomes easy to form a shell having a thickness force of O. or more.
- a core-shell type silica having a large particle size can be obtained.
- the number average particle diameter of the silica core particles By setting the number average particle diameter of the silica core particles to 100 m or less, it is possible to form porous silica having a substantially effective pore volume with respect to the silica core particles.
- the number average particle diameter of the silica core particles is determined by observing the silica core particles with a scanning electron microscope (SEM), randomly selecting 100 particles, measuring the particle diameter of each silica core particle, The average particle size.
- SEM scanning electron microscope
- the silica core particles are particularly preferably silica synthesized by the stober method in which silica synthesized by a sol-gel reaction using a metal alkoxide as a raw material is preferred from the viewpoint of the above characteristics.
- the concentration of the silica core particles per dispersion 1L is the surface area in terms of the silica core particles,. 20 to 500 meters 2 / L is preferred instrument 30 ⁇ 300m 2 / L is more preferable.
- the silica core particle concentration (in terms of surface area) 20 m 2 ZL or more when the silica raw material is reacted under the conditions of pH 8-13, almost the entire amount of the silica raw material is consumed for shell formation. Generation of new porous silica particles is suppressed. That is, if the concentration of silica core particles (in terms of surface area) is too small, fine porous silica particles may be generated as shown in the SEM photograph of FIG.
- the concentration of the silica core particles (in terms of surface area) to 500 m 2 / L or less, porous silica can be efficiently formed on the surface of the silica core particles.
- Alcohol is at least one selected from the group consisting of methanol, ethanol, isopropanol, n-propanol, ethylene glycol, and glycerin power, and from the viewpoint of good solubility of the silica raw material, methanol, ethanol Is preferred.
- the hydrolysis of alkoxysilane can be controlled at an appropriate rate by setting the alcohol concentration to 20% by mass or more, and the surface of the silica core particles is uniform.
- porous silica can be formed.
- the alcohol concentration exceeds 90% by mass, it becomes impossible to form an efficient porous silica in which the hydrolysis of alkoxysilane is slow.
- the surfactant serves as a template for forming pores in the shell.
- the type and concentration of the surfactant has a great influence on the shape of the pores of the shell.
- the surfactant one kind may be used alone, or two or more kinds may be used in combination. In order to form a shell having uniform pores, it is preferable to use one type of surfactant.
- surfactant examples include surfactants that act as templates for forming pores in the shell, and alkyl ammonium halides and alkylamines are preferred.
- alkyl ammonium halide examples include tetradecyl trimethyl ammonium ammonium halide, hexadecyl trimethyl ammonium ammonium halide, octadecyl trimethyl ammonium ammonium halide, eicosyl trimethyl ammonium ammonium halide, docosyl trimethyl ammonium ammonium halide, and the like. Can be mentioned.
- alkylamines include linear alkylamines having 8 to 20 carbon atoms, and dodecylamine is particularly preferred from the viewpoint of forming uniform pores.
- the concentration of the surfactant per liter of the dispersion is preferably 0.001 to 0.2 molZL, more preferably 0.01 to 0. ImolZL. preferable.
- the concentration of the surfactant per liter of the dispersion is preferably 0.001 to 0.2 molZL, more preferably 0.01 to 0. ImolZL. preferable.
- silica raw material alkoxy silane, sodium silicate, and a mixture thereof are preferred from the viewpoint of reaction efficiency and handling as long as they can form a silicate compound by reaction. More preferred.
- alkoxysilane trimethylmethoxysilane, trimethylethoxysilane, tetraethoxysilane, and tetramethoxysilane are particularly preferable from the viewpoint of versatility.
- the concentration of the silica raw material per liter of the total reaction liquid containing the dispersion and the silica raw material is preferably from 0.001 to 0.5 molZL, more preferably from 0.005 to 0.3 molZL.
- concentration of the silica raw material is 0.0OOmolmol or more, the silica core particles can be sufficiently covered with the shell precursor.
- concentration of the silica raw material is 0.5 molZL or less, almost all of the silica raw material is consumed for the formation of the shell, so that the generation of new porous silica particles can be suppressed.
- the reaction of the silica raw material is carried out at a pH of 8 to 13 from the start to the end of the reaction.
- a pH of less than 8 is not preferable because the hydrolysis rate of alkoxysilane is slow.
- a pH exceeding 13 is not preferable because the hydrolysis rate cannot be controlled.
- the pH is more preferably 9 to 12.5.
- the reaction temperature of the silica raw material is preferably 10 to 50 ° C, and the reaction time is preferably 1 to 24 hours.
- Shell Precursor Force As a method of removing the surfactant, (i) particles having a shell precursor formed on the surface of silica core particles (hereinafter referred to as a core-shell type silica precursor) are dissolved in the surfactant. Examples include a method in which a surfactant contained in a shell precursor is dissolved in a solvent and eluted, and (ii) a method in which a core-shell type silica precursor is baked and a surfactant contained in the shell precursor is burned off. The surfactant can be removed completely In addition, it is preferable to use the methods (i) and (ii) in combination.
- the firing temperature is preferably 400 to 600, and the firing time is preferably 1 to 10 hours.
- the core-shell type silica obtained as described above has a sphericity of 0.8 or more and a variation coefficient of 0.2 or less.
- the sphericity of the core-shell type silica is 0.8 or more, and preferably 0.9 or more.
- Core-shell type silica having a sphericity of 0.8 or more has an advantage in that it has a good sphericity and thus can be packed into a column for liquid chromatography.
- the sphericity is determined in the same manner as the sphericity of the silica core particles.
- the variation coefficient of the core-shell type silica is 0.2 or less, preferably 0.15 or less.
- Core-shell silica with a coefficient of variation of 0.2 or less has a high sphericity, so it has good packing properties for liquid chromatography columns, and also has high uniformity and high separation efficiency. Have.
- the variation coefficient is determined in the same manner as the variation coefficient of the silica core particles.
- the number average particle diameter of the core-shell type silica is preferably 0.2 to: L is preferably 10 ⁇ m, more preferably 1 to 90 ⁇ m.
- L is preferably 10 ⁇ m, more preferably 1 to 90 ⁇ m.
- the number average particle size is determined in the same manner as the number average particle size of the silica core particles.
- the shell is porous silica.
- porous means that the core-shell type silica measured by the nitrogen gas adsorption method has the following physical properties, assuming that the silica core particles do not exist (Om 2 / g). .
- Pore volume 0.05-2mLZg
- the average pore diameter of the shell By setting the average pore diameter of the shell to 2 nm or more, liquid chromatography When used as a filler, it functions as an adsorption layer. By setting the average pore diameter of the shell to 5 Onm or less, it can be used for separation of large molecules such as proteins.
- the shell substantially functions as a porous layer.
- the pores of the shell layer have an appropriate size, the shell layer has an appropriate porosity, and the strength of the shell layer is maintained.
- the shell substantially functions as a porous layer.
- the pores of the shell layer become an appropriate size, the porosity of the shell layer becomes an appropriate value, and the strength of the shell layer is maintained.
- the thickness of the shell is preferably 0.1 to 10 ⁇ m, and more preferably 0.2 to 5 ⁇ m. When the thickness of the shell is 0.1 m or more, it substantially functions as a shell layer. By setting the shell thickness to 10 ⁇ m or less, the desired separation efficiency is exhibited.
- the thickness of the shell is obtained from the following formula.
- Shell thickness (number average particle diameter of core-shell type silica-number average particle diameter of silica core particles) ⁇ 2.
- a core seal type silica having a substantially uniform seal was obtained can be confirmed by the fact that the thickness variation obtained by the following method is 0.2 or less.
- Core-shell type silica with a shell thickness variation of 0.2 or less has a substantially uniform shell layer thickness. Therefore, when used as a packing material for liquid chromatography, the shell layer of the substance to be separated is not suitable. The time distribution until the force is released and the force is released is small and the separation efficiency is high.
- the variation in shell thickness is measured by observing the cross section of the core-shell type silica with a transmission electron microscope (TEM), and measuring the maximum shell thickness and the minimum shell thickness for one randomly selected particle. It is obtained from the following formula.
- Thickness variation (maximum shell thickness minimum shell thickness) Z maximum shell thickness.
- the sphericity is 0.8 or more and the coefficient of variation is 0.2 or less, that is, the sphericity is high and the particle size distribution is narrow.
- the silica core is obtained by the steps (a) to (c). Since a porous shell having a substantially uniform thickness is formed on the surface of the particles, the sphericity is 0.8 or more and the coefficient of variation is 0.2 or less, that is, the particle size distribution has a high sphericity. Narrow core-shell type silica can be produced.
- a silica raw material is added to a dispersion of silica core particles without using a special apparatus, and a silica raw material is reacted under the conditions of ⁇ 8 to 13 to form a shell precursor, and further from the shell precursor. Since it can be produced simply by removing the surfactant, the core-shell type silica can be produced easily.
- the pore property values (specific surface area, average pore diameter and pore volume) of silica core particles and core-shell type silica are measured using a pore property measuring device (manufactured by Cantachrome, Auto Soap).
- silica core particles CIMA electronic Corp. HPS- 1000 (number average particle size 1. O ⁇ m, a specific surface area of 3. 5 m 2 Zg, sphericity 0. 95 coefficient of variation 0.5 07.) was prepared. An SEM photograph of the silica core particles is shown in FIG.
- the reaction solution was filtered using a membrane filter with a pore size of 0.1 ⁇ m, and the core shell
- the type silica precursor was recovered.
- the core-shell type silica precursor was dispersed in 50 mL of ethanol and stirred at 70 ° C. for 1 hour to dissolve and remove part of the dodecylamine.
- the dispersion was filtered using a membrane filter having a pore size of 0: m, and the core-shell type silica precursor was recovered.
- the core-shell type silica precursor was calcined at 550 ° C. for 3 hours to completely remove dodecylamine to obtain a core-schenole type silica.
- FIG. 3 shows an SEM photograph of the obtained core-shell type silica
- FIG. 4 shows a TEM photograph of a cross section of the core-shell type silica.
- the black part is the core
- the part that is partially transparent on the outer periphery of the core is the shell.
- the number average particle diameter of the core-shell type silica (100 particles) was 1.3 m.
- the sphericity was 0.92 and the coefficient of variation was 0.10.
- the core-shell type silica has an average pore diameter of 2.5 nm, a specific surface area of 146 m 2 Zg, a pore volume of 0.09 ml Zg, and is confirmed to be porous. * i3 ⁇ 4.
- the shell thickness was 0.15 m.
- the variation in the thickness of the shell was substantially 0, and it was confirmed that the core-shell type silica had a uniform shell.
- Core-shell type silica was prepared in the same manner except that 0.5 g of ammonia water was used instead of dodecylamine.
- the number average particle size of the obtained core-shell type silica was 1.05 m.
- the shell was substantially nonporous.
- the core-shell type silica of the present invention is useful as a packing material for liquid chromatography, a shape selective catalyst, a material for adsorption / separation of various ions, a matting material for paints, and the like.
- a filling material for liquid chromatography it is possible to achieve both a low liquid feeding resistance (pressure loss suppression) and a high separation efficiency.
Abstract
Description
Claims
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JP2008512027A JPWO2007122930A1 (ja) | 2006-04-20 | 2007-03-16 | コアシェル型シリカおよびその製造方法 |
CN2007800137869A CN101426725B (zh) | 2006-04-20 | 2007-03-16 | 核壳型二氧化硅及其制造方法 |
EP07738887A EP2008971A4 (en) | 2006-04-20 | 2007-03-16 | CORE SILICA-ENVELOPE AND METHOD FOR MANUFACTURING SAME |
US12/250,745 US7976812B2 (en) | 2006-04-20 | 2008-10-14 | Method for producing non-porous core-porous shell silica |
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US12/250,745 Continuation US7976812B2 (en) | 2006-04-20 | 2008-10-14 | Method for producing non-porous core-porous shell silica |
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EP (1) | EP2008971A4 (ja) |
JP (1) | JPWO2007122930A1 (ja) |
KR (1) | KR20080111032A (ja) |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5371699A (en) * | 1976-12-08 | 1978-06-26 | Du Pont | Surface porous granules and method of making same |
JPH03139537A (ja) * | 1989-10-25 | 1991-06-13 | Mizusawa Ind Chem Ltd | 新規充填剤及びその製法 |
JPH1160231A (ja) * | 1997-06-13 | 1999-03-02 | Mizusawa Ind Chem Ltd | 二重構造を有する非晶質シリカ粒子、その製法及び用途 |
JP2002275389A (ja) * | 2001-03-21 | 2002-09-25 | Mizusawa Ind Chem Ltd | 吸油量の増大した非晶質シリカ粒子、その製法及び用途 |
JP2006116595A (ja) | 2004-09-21 | 2006-05-11 | Nissan Motor Co Ltd | 液圧成形装置及び液圧成形方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2883347A (en) * | 1955-09-13 | 1959-04-21 | Bell Telephone Labor Inc | Formation of expanded silica spheres |
US4010242A (en) * | 1972-04-07 | 1977-03-01 | E. I. Dupont De Nemours And Company | Uniform oxide microspheres and a process for their manufacture |
US4131542A (en) * | 1977-07-19 | 1978-12-26 | E. I. Dupont De Nemours And Company | Spray dried silica for chromatography |
US4600646A (en) * | 1984-08-15 | 1986-07-15 | E. I. Du Pont De Nemours And Company | Metal oxide stabilized chromatography packings |
US4770286A (en) * | 1986-11-17 | 1988-09-13 | Automated Systems, Inc. | Workpiece elevator |
EP0380630B1 (en) | 1988-07-08 | 1994-11-30 | Famcy Steel Corporation | Use of a high damping capacity, two-phase fe-mn-al-c alloy |
IT1263807B (it) * | 1992-01-24 | 1996-09-03 | Mizusawa Industrial Chem | Granuli sferici di silice porosa oppure di silicato poroso, procedimento per la loro produzione e loro impiego |
FR2747668B1 (fr) * | 1996-04-22 | 1998-05-22 | Rhone Poulenc Chimie | Procede de preparation de silice comprenant une ecorce de silice et un coeur en un materiau autre |
MY117802A (en) * | 1997-06-13 | 2004-08-30 | Mizusawa Industrial Chem | Amorphous silica particles having a double structure, process for producing the same and use |
JP3139537B2 (ja) | 1997-08-28 | 2001-03-05 | 東興建設株式会社 | 法面緑化工法 |
CN1193818C (zh) * | 2002-03-13 | 2005-03-23 | 华东理工大学 | 一种二氧化硅磁性微球及其制备方法 |
WO2003078159A1 (en) * | 2002-03-13 | 2003-09-25 | Regents Of The University Of Minnesota | Silica-based materials and methods |
-
2007
- 2007-03-16 EP EP07738887A patent/EP2008971A4/en not_active Withdrawn
- 2007-03-16 JP JP2008512027A patent/JPWO2007122930A1/ja active Pending
- 2007-03-16 CN CN2007800137869A patent/CN101426725B/zh not_active Expired - Fee Related
- 2007-03-16 KR KR1020087024245A patent/KR20080111032A/ko not_active Application Discontinuation
- 2007-03-16 WO PCT/JP2007/055442 patent/WO2007122930A1/ja active Application Filing
-
2008
- 2008-10-14 US US12/250,745 patent/US7976812B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5371699A (en) * | 1976-12-08 | 1978-06-26 | Du Pont | Surface porous granules and method of making same |
JPH03139537A (ja) * | 1989-10-25 | 1991-06-13 | Mizusawa Ind Chem Ltd | 新規充填剤及びその製法 |
JPH1160231A (ja) * | 1997-06-13 | 1999-03-02 | Mizusawa Ind Chem Ltd | 二重構造を有する非晶質シリカ粒子、その製法及び用途 |
JP2002275389A (ja) * | 2001-03-21 | 2002-09-25 | Mizusawa Ind Chem Ltd | 吸油量の増大した非晶質シリカ粒子、その製法及び用途 |
JP2006116595A (ja) | 2004-09-21 | 2006-05-11 | Nissan Motor Co Ltd | 液圧成形装置及び液圧成形方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2008971A4 * |
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Also Published As
Publication number | Publication date |
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CN101426725B (zh) | 2011-04-13 |
EP2008971A1 (en) | 2008-12-31 |
CN101426725A (zh) | 2009-05-06 |
EP2008971A4 (en) | 2010-08-04 |
US20090053524A1 (en) | 2009-02-26 |
KR20080111032A (ko) | 2008-12-22 |
US7976812B2 (en) | 2011-07-12 |
JPWO2007122930A1 (ja) | 2009-09-03 |
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