WO1998040417A1 - Verfahren zur desodorierung von polyolefingranulaten - Google Patents
Verfahren zur desodorierung von polyolefingranulaten Download PDFInfo
- Publication number
- WO1998040417A1 WO1998040417A1 PCT/EP1998/001036 EP9801036W WO9840417A1 WO 1998040417 A1 WO1998040417 A1 WO 1998040417A1 EP 9801036 W EP9801036 W EP 9801036W WO 9840417 A1 WO9840417 A1 WO 9840417A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polyolefin
- water vapor
- granules
- steam
- polyolefin granules
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F6/00—Post-polymerisation treatments
- C08F6/001—Removal of residual monomers by physical means
- C08F6/005—Removal of residual monomers by physical means from solid polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/0009—After-treatment of articles without altering their shape; Apparatus therefor using liquids, e.g. solvents, swelling agents
- B29C2071/0027—Removing undesirable residual components, e.g. solvents, unreacted monomers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
Definitions
- the invention relates to a process for the deodorization of polyolefins and the use of deodorized polyolefin granules for the production of polyolefin-containing plastic moldings with little impairment of taste and smell.
- Plastic moldings made from polyolefins are of high technical importance and find, since polyolefins as saturated hydrocarbons are largely chemically inert, among other things. widely used in the manufacture of household goods and electrical household appliances, as packaging materials, e.g. for food as well as pipelines, e.g. for cold and hot water pipes.
- additives such as stabilizers, plasticizers, etc. are used in the production and processing of plastic raw materials. added to the polyolefins; on the other hand, monomeric building blocks remain in a low concentration. Although the raw materials and additives used, as well as the concentration of remaining chemical building blocks in the plastic moldings made from these materials are harmless to food law and industrial hygiene, in some applications the personal sense of smell and taste is impaired.
- deodorants are used for the deodorization of products from the household goods, plastics, lacquer and paint as well as the textile and detergent industries. Odor improvers are used, which only cover the disturbing odor and taste properties.
- a method for reducing chlorine contents and residual solvent contents in the production of polypropylene powders (DE A 3025051). Granules are produced from powders treated in this way with the addition of stabilizers. Plastic moldings that are made from this material, however, have a noticeable odor and taste impairment.
- the present invention relates to a process for the deodorization of polyolefin granules, characterized in that the polyolefin granules are flushed with a gas mixture of water vapor and air, a gas mixture of water vapor and nitrogen (N 2 ) or with pure water vapor.
- the process according to the invention can be carried out in continuous or discontinuous operation at normal pressure, elevated pressure, advantageously up to 10 bar, or reduced pressure.
- the specific amounts of steam used are between 0.01 and 2 kg of steam per kg of polyolefin granules, advantageously between 0.3 and 2 kg of steam per kg of polyolefin granules.
- the temperature is generally between 80 and 150 ° C, preferably between 90 and 130 ° C.
- the granules can be introduced into the apparatus wet or dry, cold or heated.
- the duration of treatment can be a few minutes or several hours, depending on the procedure. With increased pressure, a high specific amount of steam and a high temperature, the treatment time can be, for example, only 2 to 30 minutes, with other processes up to 48 hours.
- a treatment time of 1 to 10 hours is technically interesting and advantageous.
- the invention also relates to the use of the polyolefin granules treated by the process according to the invention as a material for coating or producing shaped articles, in particular for use as household goods and pipelines.
- the polyolefin granules used according to the invention include granules, the polyolefins of the general structure
- R2 contain, wherein R 1 and R 2 are each hydrogen, a straight-chain or branched saturated aliphatic radical having 1 to 6 carbon atoms or a cycloaliphatic group. This also includes granules that contain polyolefin copolymers.
- Preferred polyolefins are polyethylenes (PE), polypropylenes (PP), poly (1-butenes) (PB), polyisobutenes and poly (4-methyl-1-pentene) s and copolymers of ethylene and propylene (ie statistical copolymers and polyolefin).
- Rubbers terpolymers of ethylene, propylene and hydrocarbons containing two or more non-conjugated double bonds (ie polyolefin elastomers) and mixtures of PP, rubber and PE, for example by coextrusion (extruder blends) or in situ (C2 / C3 reactor blends) getting produced.
- the process according to the invention can be used particularly advantageously on pipe materials made of polyethylene or polypropylene, in particular on PP materials which have an MFR (230/5) of 0.4 to 2 dg / min and an ethylene content of 0.0 to 11% by weight. % and have granules. These materials are offered by various polyolefin producers and can be colored or available as natural goods.
- the polyolefin granules used according to the invention can also contain additives, for example stabilizers, plasticizers, colorants, light stabilizers, flame retardants, antioxidants or nucleating agents, and / or fillers, for example chalk, talc, mica, glass fiber or glass beads.
- additives for example stabilizers, plasticizers, colorants, light stabilizers, flame retardants, antioxidants or nucleating agents, and / or fillers, for example chalk, talc, mica, glass fiber or glass beads.
- Possible apparatus for carrying out the deodorization of the polyolefin granules are extraction columns, flow tubes, filter screens, stirred tanks, pressure tanks, silos and fluidized bed reactors, but preferably stirred tanks, pressure tanks or silos.
- a common feature of the apparatus that can be used according to the invention is that the polyolefin granules in the apparatus are subjected to a steam treatment, in particular a steam distillation or extraction. Air or nitrogen can be added to the water vapor.
- Possible variants of the method according to the invention are set out in the examples.
- the treatment of granules is characteristic of the deodorization process.
- the method can also be used for the deodorization of plastic moldings.
- the odor or taste threshold value (GSW) is determined in an odor or taste test.
- the regulation is reproduced in detail in Example 2.
- the deodorized polyolefin granules can be used for the production of hollow bodies, pipelines, packaging materials and films, filters, hygiene fleeces, white devices - housings (eg coffee machines) and polyolefin plates for apparatus construction.
- the deodorized polyolefin granules are particularly suitable for the production of cold and warm drinking water pipes, water containers, drinking cups and food packaging.
- the polyolefin molding compositions can be brought into the desired final shape by customary processes such as pressing, casting, calendering, extruding, blow molding, injection molding, etc.
- Patent application 19606510.0 (1996) was prepared accordingly. These granules were air-granulated in a twin-screw extruder at 300 ° C, then dried in a stream of N at 100 ° C and then regranulated two more times.
- Odor test Each dilution is smelled by at least three people and each 'the subjective impression is noted.
- the GSW is determined based on Table 1 below. For example, a GSW1 results if there is a weak one at dilution 1 Odor impairment is found and the dilutions 2 to 4 have no odor.
- a GSW2-4 results if there is a strong odor impairment at dilutions 1 and 2 and dilutions 3 and 4 have no recognizable smell.
- a gray PP granulate produced according to Example 1 was placed in an apparatus which consists of an upright cylindrical stainless steel tube with a diameter of 11.9 cm and a height of 103 cm.
- the apparatus is equipped with a water vapor supply, an N inlet, a condensate separator and devices for temperature, pressure, N quantity and steam quantity measurement.
- the stainless steel tube is electrically heated from the outside.
- the apparatus was flushed with N 2 and heated to 100 ° C.
- N and water vapor were introduced from below, the N 2 being preheated to approximately 90 ° C.
- the gas mixture steam and nitrogen
- the apparatus was let down and cold N 2 (23 ° C.) was passed through and the mixture was cooled.
- the apparatus was then opened and the PP granules removed.
- Example 4 The individual PP granulate samples from Example 3 and an untreated PP granulate as a reference sample were dried in a drying cabinet at 120 ° C. in a stream of N. An odor test was then carried out. The GSW determined are summarized in the last column of Table 2.
- Example 3 The procedure was as in Example 3, using a PP natural granulate instead of the gray PP granulate.
- the test data are summarized in Table 3.
- Example 6 The individual PP granulate samples from Example 5 and an untreated PP granulate as reference sample were dried analogously to Example 4 and subjected to an odor test.
- the GSW determined are summarized in the last column of Table 3.
- Example 7 The procedure was as in Example 3 (e), but 60% of the steam / N mixture was reintroduced into the apparatus from below after passing through the apparatus. The remaining 40% was discarded as a waste gas stream. The PP granules were assessed as in Example 4; Test result: GSWO (nnb).
- Example 8 The granules from Example 1 were placed in a deodorization apparatus which consisted of an upright cylindrical vessel with a diameter of 2 m, a height of 6 m, a volume of 38 m 3 , a water vapor feed, a hot air inlet, a condensate separator, a temperature and a pressure measurement, a hot air quantity measurement and a steam quantity measurement.
- the vessel can be heated electrically from the outside.
- the apparatus was heated to 100 ° C. with hot air and by introducing low-pressure steam. A pressure of 180 mbar was established. Hot air and low-pressure steam were introduced from below. The air was preheated to approx. 90 ° C. After a defined time, the apparatus was depressurized and flowed through with N and cooled.
- the PP granulate was taken down from the apparatus into a gala Dryer and from there into a vibrating screen dryer. The exact test data are as follows:
- Deodoriser Live steam: 2500 kg / h hot air: 700 kg / h water: 100 kg / h
- Dryer throughput: 6000 kg / h
- Deodoriser Live steam: 2500 kg / h hot air: 700 kg / h
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98913581A EP0964877A1 (de) | 1997-03-07 | 1998-02-23 | Verfahren zur desodorierung von polyolefingranulaten |
US09/380,404 US6218504B1 (en) | 1997-03-07 | 1998-02-23 | Method for deodorizing polyolefin granulates |
AU68228/98A AU6822898A (en) | 1997-03-07 | 1998-02-23 | Method for deodorizing polyolefin granulates |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19709553.4 | 1997-03-07 | ||
DE19709553A DE19709553A1 (de) | 1997-03-07 | 1997-03-07 | Verfahren zur Desodorierung von Polyolefingranulaten |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998040417A1 true WO1998040417A1 (de) | 1998-09-17 |
Family
ID=7822685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/001036 WO1998040417A1 (de) | 1997-03-07 | 1998-02-23 | Verfahren zur desodorierung von polyolefingranulaten |
Country Status (8)
Country | Link |
---|---|
US (1) | US6218504B1 (de) |
EP (1) | EP0964877A1 (de) |
AR (1) | AR012040A1 (de) |
AU (1) | AU6822898A (de) |
DE (1) | DE19709553A1 (de) |
TW (1) | TW353085B (de) |
WO (1) | WO1998040417A1 (de) |
ZA (1) | ZA981911B (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2072203A1 (de) | 2007-12-18 | 2009-06-24 | Borealis Technology Oy | Entfernung flüchtiger Verbindungen aus Polymerpellets |
US7776998B2 (en) | 2002-10-30 | 2010-08-17 | Ineos Manufacturing Belgium Nv | Polymer treatment |
WO2013072035A1 (en) | 2011-11-14 | 2013-05-23 | Borealis Ag | Removing volatile compounds from polymer granules by vapour distillation |
DE102022204421A1 (de) | 2022-05-04 | 2023-11-09 | Coperion Gmbh | Vorrichtung und Verfahren zum Ermitteln von Betriebsparametern für das Entgasen und/oder Desodorieren von Kunststoffpartikeln |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19850885C1 (de) * | 1998-11-05 | 2000-07-20 | Waeschle Gmbh | Verfahren zum Herstellen von Granulaten aus polymeren Werkstoffen |
US6997403B2 (en) * | 2003-01-13 | 2006-02-14 | Micron Technology, Inc. | Liquid vaporizer with positive liquid shut-off |
US7786254B2 (en) * | 2006-08-03 | 2010-08-31 | Basell Polyolefine Gmbh | Process for the polyolefin finishing |
WO2011068717A1 (en) | 2009-12-03 | 2011-06-09 | Envision Plastics Industries, Llc | Process of producing pcr pellets |
EP3126408B1 (de) | 2014-03-31 | 2017-10-25 | SABIC Global Technologies B.V. | Verfahren zur herstellung von emissionsarmem polypropylen |
US10435552B2 (en) | 2015-06-12 | 2019-10-08 | Sabic Global Technologies B.V. | Process for manufacture of low emission polypropylene |
CN110198963B (zh) | 2016-12-12 | 2022-06-24 | Sabic环球技术有限责任公司 | 制造低排放异相聚丙烯的方法 |
EP3551674A1 (de) | 2016-12-12 | 2019-10-16 | SABIC Global Technologies B.V. | Verfahren zur herstellung von emissionsarmem homopolymer oder statistischem polypropylen |
US11608432B2 (en) | 2016-12-12 | 2023-03-21 | Sabic Global Technologies B.V. | Pellet comprising thermoplastic polymer sheath surrounding glass filaments having reduced emissions |
EP3647328B1 (de) | 2018-10-31 | 2023-09-06 | Borealis AG | Reduzierung der voc- und nebelwerte von polypropylenqualitäten durch belüftung |
EP3647349A1 (de) | 2018-10-31 | 2020-05-06 | Borealis AG | Belüftete polypropylenzusammensetzungen mit spezifischen emissionsprofilen |
EP3786190A1 (de) | 2019-08-30 | 2021-03-03 | Borealis AG | Reduktion der flüchtigen organischen verbindungs- und nebelwerte von gefülltem heterophasischen polypropylen durch getrennte belüftung von einzelnen polyolefinkomponenten |
ES2934969T3 (es) | 2020-09-02 | 2023-02-28 | Borealis Ag | Eliminación de sustancias odoríferas de residuos de poliolefina después de su consumo |
KR20230100747A (ko) | 2020-11-25 | 2023-07-05 | 보레알리스 아게 | 소비후 폴리올레핀 폐기물로부터 악취 물질의 제거 |
WO2023180529A1 (en) | 2022-03-25 | 2023-09-28 | Borealis Ag | Removal of odorants from polyolefin particles |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0004601A1 (de) * | 1978-04-05 | 1979-10-17 | BASF Aktiengesellschaft | Verfahren zum Entfernen geruchsintensiver Bestandteile aus feinteiligen Olefinpolymerisaten |
US4332933A (en) * | 1979-07-02 | 1982-06-01 | Montedison S.P.A. | Process for treating olefinic polymers with steam |
US4666994A (en) * | 1985-04-12 | 1987-05-19 | Du Pont Canada Inc. | Color of polymers |
US5191062A (en) * | 1991-09-27 | 1993-03-02 | Union Carbide Chemicals & Plastics Technology Corporation | Steam purging of granular epdm resins |
WO1996011216A1 (en) * | 1994-10-11 | 1996-04-18 | Borealis A/S | New polypropylene composition with broad mwd |
EP0739937A2 (de) * | 1995-04-28 | 1996-10-30 | Hoechst Aktiengesellschaft | Rohr aus Polyethylen mit verbesserten mechanischen Eigenschaften |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19606510A1 (de) | 1996-02-22 | 1997-08-28 | Hoechst Ag | Hochmolekulares Polypropylen mit breiter Molmassenverteilung |
-
1997
- 1997-03-07 DE DE19709553A patent/DE19709553A1/de not_active Withdrawn
-
1998
- 1998-02-23 EP EP98913581A patent/EP0964877A1/de not_active Ceased
- 1998-02-23 US US09/380,404 patent/US6218504B1/en not_active Expired - Fee Related
- 1998-02-23 AU AU68228/98A patent/AU6822898A/en not_active Abandoned
- 1998-02-23 WO PCT/EP1998/001036 patent/WO1998040417A1/de not_active Application Discontinuation
- 1998-03-06 TW TW087103305A patent/TW353085B/zh active
- 1998-03-06 AR ARP980101008A patent/AR012040A1/es not_active Application Discontinuation
- 1998-03-06 ZA ZA9801911A patent/ZA981911B/xx unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0004601A1 (de) * | 1978-04-05 | 1979-10-17 | BASF Aktiengesellschaft | Verfahren zum Entfernen geruchsintensiver Bestandteile aus feinteiligen Olefinpolymerisaten |
US4332933A (en) * | 1979-07-02 | 1982-06-01 | Montedison S.P.A. | Process for treating olefinic polymers with steam |
US4666994A (en) * | 1985-04-12 | 1987-05-19 | Du Pont Canada Inc. | Color of polymers |
US5191062A (en) * | 1991-09-27 | 1993-03-02 | Union Carbide Chemicals & Plastics Technology Corporation | Steam purging of granular epdm resins |
WO1996011216A1 (en) * | 1994-10-11 | 1996-04-18 | Borealis A/S | New polypropylene composition with broad mwd |
EP0739937A2 (de) * | 1995-04-28 | 1996-10-30 | Hoechst Aktiengesellschaft | Rohr aus Polyethylen mit verbesserten mechanischen Eigenschaften |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7776998B2 (en) | 2002-10-30 | 2010-08-17 | Ineos Manufacturing Belgium Nv | Polymer treatment |
US7790842B2 (en) | 2002-10-30 | 2010-09-07 | Ineos Manufacturing Belgium Nv | Polymer treatment |
EP2072203A1 (de) | 2007-12-18 | 2009-06-24 | Borealis Technology Oy | Entfernung flüchtiger Verbindungen aus Polymerpellets |
US9216548B2 (en) | 2007-12-18 | 2015-12-22 | Borealis Technology Oy | Removing volatile compounds from polymer pellets |
WO2013072035A1 (en) | 2011-11-14 | 2013-05-23 | Borealis Ag | Removing volatile compounds from polymer granules by vapour distillation |
US9550132B2 (en) | 2011-11-14 | 2017-01-24 | Borealis Ag | Removing volatile compounds from polymer granules by vapour distillation |
DE102022204421A1 (de) | 2022-05-04 | 2023-11-09 | Coperion Gmbh | Vorrichtung und Verfahren zum Ermitteln von Betriebsparametern für das Entgasen und/oder Desodorieren von Kunststoffpartikeln |
Also Published As
Publication number | Publication date |
---|---|
US6218504B1 (en) | 2001-04-17 |
AU6822898A (en) | 1998-09-29 |
AR012040A1 (es) | 2000-09-27 |
TW353085B (en) | 1999-02-21 |
DE19709553A1 (de) | 1998-09-10 |
ZA981911B (en) | 1999-09-06 |
EP0964877A1 (de) | 1999-12-22 |
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