CN102211983B - Preparation method of perfluoromethyl vinyl ether - Google Patents
Preparation method of perfluoromethyl vinyl ether Download PDFInfo
- Publication number
- CN102211983B CN102211983B CN 201110088685 CN201110088685A CN102211983B CN 102211983 B CN102211983 B CN 102211983B CN 201110088685 CN201110088685 CN 201110088685 CN 201110088685 A CN201110088685 A CN 201110088685A CN 102211983 B CN102211983 B CN 102211983B
- Authority
- CN
- China
- Prior art keywords
- preparation
- reaction
- trifluoromethoxy
- fluoride
- tetrafluoroethylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention relates to a preparation method of perfluoromethyl vinyl ether, and belongs to the field of fluorine-containing plastics. The preparation method comprises the following steps of: preparing CF3OK by using potassium fluoride, carbonyl fluoride and tetrafluoroethylene as initial raw materials and using acetonitrile as a solvent in the absence of a catalyst, and reacting the CF3OK with tetrafluoroethylene in the presence of a little amount of water to prepare the perfluoromethyl vinyl ether serving as a target product. The reaction temperature is normal temperature in the whole process, the reaction of the first step is under normal pressure, and the reaction of the second step does not need external pressure, so the reaction conditions are easily realized and easily controlled; moreover, the equipment used in the preparation process has simple structure, so the cost of the whole production process is low; the intermediate products do not need high-purity separation, so the middle separation step is reduced, and the synthesis cost is reduced; meanwhile, the acetonitrile solvent can be recycled and is not released to the air space, so the method has no pollution and is environment-friendly; therefore, the method can be applied to large-scale industrialized production.
Description
Technical field
The invention belongs to extraordinary fluorine-containing comonomer field, be specifically related to carbonyl fluoride (COF
2), Potassium monofluoride (KF) and tetrafluoroethylene (TFE) prepare the method for perfluoro methyl vinyl ether (PMVE) for raw material.
Background technology
Perfluoro methyl vinyl ether (PMVE) can be used as the manufacture process that raw material is applied to the various fluoropolymers such as fluoroplastics, viton, is the important monomer of modification viton and modification fluoroplastics preparation.For example: PMVE can form viton with tetrafluoroethylene generation copolymerization, and this kind viton has the advantage that tetrafluoroethylene is heat-resisting, the reagent of anti-the number of chemical corrodes; Under the condition of contacted hot steam, but this kind viton stable existence 1 year; In Hydroxyapatite Coatings in Alkaline Solution, also can surpass 3000 hours duration of service continuously, so be widely used in the sealing article (fluid machinery, 34,52 (2006)) under the continuous duty.In addition, this kind viton has very low ventilation property, and anti-creep is suitable for making the sealing member that uses under the extensive chemical corrosive environment, diaphragm, flexible pipe etc.Because perfluor ether elastomerics has excellent physicals and anti-various chemical drugs moral character, and Applicable temperature scope extremely wide (45～316 ℃), so be widely used in chemical industry, oil, machinofacture, Aeronautics and Astronautics, electronic instrument, shipbuilding and various types of vehicles, can satisfy the requirement for environmental conditions (Chinese rubber of many harshnesses, 17,23 (2001)).
At present, about the existing many reports of the synthetic method of PMVE.For example, the U.S., Russia and China have reported respectively and have utilized carbonyl fluoride (COF
2) react with Propylene oxide hexafluoride (HFPO), obtain acyl fluorides ether; Then acyl fluorides ether and K
2CO
3Or Na
2CO
3Salify namely obtains fluorine-containing vinyl ether to the carboxylate salt pyrolysis, and this kind method is the main method of present industrial production PMVE.Yet the method can't be stopped the generation of Tetrafluoroethane base ether in preparation process, and to K
2CO
3Or Na
2CO
3, the water-content in the solvent, catalyzer has very strict requirement, and reacted solvent and catalyzer be difficult to reclaim and use, and causes a large amount of solvents, catalyzer waste, and cause certain environmental problem (Russ.J.Appl.Chem., 2005,1640-1645; CA101659602A; UA3114778; Journal of Polymer Science, Part A:Polymer Chem., 1968,398-405).In addition, United States Patent (USP) (UA 3321532) has been reported with metal oxide (SiO
2, CaO, ZnO etc.) and be catalyzer, remove the method that the acyl fluorides base obtains fluorine-containing vinyl ether by acyl fluorides ether at 300 ℃ of high temperature pyrolysis; Contain a small amount of Tetrafluoroethane base ether by product in the product that the method obtains, this by product ether be difficult to separate with usual way, so that the cost of subsequent treatment process significantly improves.In addition, document and patent report are arranged, the synthetic PMVE take carbonyl fluoride and CFCl=CFCl as raw material, the technological process more complicated of the method catalyst pretreatment and activation, time is longer, and target product needs the cryogenic condensation backflow to collect manufacturing cost relatively high (WO 2009/150091, Journal of Polymer Science, Part A:General Papers 1965,4065-4074 and Chinese patent CA1775722A).The raw materials used HFPO of above method, CFCl=CFCl be unrealized large-scale industrial production all, and be expensive.
Summary of the invention
The purpose of this invention is to provide a kind of take carbonyl fluoride, metal fluoride (MF) and tetrafluoroethylene (TFE) as raw material, under relative mild conditions, with the novel method of the synthetic perfluoro methyl vinyl ether (PMVE) of pattern of the cost of cheapness, safety.The method need not catalyzer and raw material is easy to get, so have extremely strong industrial application value.
The manufacture method of perfluoro methyl vinyl ether is characterized in that: be CF with structural formula
3The trifluoromethoxy salt of OM and tetrafluoroethylene reaction and making, described reaction conditions is: under normal temperature, secluding air condition, to being dissolved with in the trifluoromethoxy salts solution, add Trace water, stir and add tetrafluoroethylene reaction, described CF in solution down
3The mol ratio of OM and water is 1: 0.005～0.01.
The solvent of described trifluoromethoxy salts solution is polar aprotic solvent.
Described polar aprotic solvent is acetonitrile.
Described M is basic metal or alkaline-earth metal.
Described M is potassium or sodium.
Described oxygen content is lower than 1ppm.
Described CF
3The mol ratio of OM and tetrafluoroethylene is controlled at 1: 1.0～and 1.2.
The time of described reaction is 24～72 hours.
Described perfluoro methyl vinyl ether is to derive the gas of producing in the reactor by gas collector, then carries out rectifying separation and obtains.
Described trifluoromethoxy salt makes by the following method: adopt carbonyl fluoride, metal fluoride (MF) to react and obtain.
Described reaction conditions is: under the room temperature, pass into carbonyl fluoride gas in the solution that is dissolved with metal fluoride, the mol ratio of metal oxide and carbonyl fluoride is 1: 2.0.
The solvent of described metal fluoride solution is polar aprotic solvent, and the mol ratio of metal fluoride and polar aprotic solvent is 1: 8～12.
The pressure that described carbonyl fluoride gas passes into is 1～5 normal atmosphere, and the reaction times is 3～5 hours.
Employing nitrogen purging after reaction when described trifluoromethoxy salt prepares is finished to take away gas and the liquid in the reaction vessel, is communicated with COF on the described reaction vessel
2Retrieving arrangement, water washing device and alkaline cleaner.
The mixture that obtains after described reaction is finished is directly used in the preparation of perfluoro methyl vinyl ether.
Need do except water treatment before the described metal fluoride reaction.
Described water-eliminating method, is dried metal fluoride under 250～300 ℃ of conditions for by retort furnace, and drying time is 2～3 hours, to remove the crystal water in the metal fluoride.
The present invention adopts CF
3OK under the condition that has a small amount of water to exist, in the condition of normal temperature and secluding air (because reaction raw materials has tetrafluoroethylene, when aerobic exists, explosive) lower and tetrafluoroethylene reacts, preparation target product perfluoro methyl vinyl ether, reaction conditions are realized easily, also easily control; In addition, the employed simple in equipment of this preparation process is so the cost of whole production process is lower.Raw material CF of the present invention
3OK can adopt other method to obtain, preferred the inventive method.Whole reaction process is as follows:
The present invention prepares PMVE by two-step approach, and the first step is with COF
2And metal fluoride (MF) is raw material, under normal temperature and pressure conditions, and preparation trifluoromethoxy salt; Second step is that tetrafluoroethylene and trifluoromethyl oxygen base salt react under normal temperature condition, is prepared into PMVE, and concrete detailed operation steps is as follows:
1, CF
3The preparation of OK:, dry KF under 250～300 ℃ of conditions by retort furnace (1), and drying time is 2～3 hours, removes the crystal water among the KF; (2) accurate a certain amount of KF of weighing puts into reactor, and the entrance of reactor connects COF
2Steel cylinder, outlet connects COF successively
2Retrieving arrangement, water washing device and alkaline cleaner, the volume of acetonitrile be overall reactor long-pending 1/2～2/3, the mol ratio of KF and acetonitrile is preferably 1: 8～1: 12, the stirring and dissolving time is preferably 10～15 minutes; (3) in stirring and room temperature situation, open COF
2The valve of steel cylinder after the reducing valve decompression, reacts the COF of KF and adding in the acetonitrile solution that carbonyl fluoride is passed into KF at the uniform velocity
2Mol ratio is 1: 2.0; (4) stop to pass into carbonyl fluoride, use nitrogen instead reactor is purged, remove the COF in the reactor
2, namely obtain CF
3The acetonitrile solution of OK can be directly used in next step reaction;
2, CF
3OCF=CF
2Preparation: (5) are CF
3The acetonitrile solution of OK joins in the closed reactor, and adds the deionized water of magnetic stir bar and trace, CF in reactor
3The mol ratio of OK and water is 1: 0.005～1: 0.01; Then reactor is connected on the vacuum line, uses liquid nitrogen that reactor is cooled off, vacuumize (low vacuum is in 0.01Pa), to remove the air in the reactor; (6) by vacuum line, in reactor, accurately add a certain amount of tetrafluoroethylene, CF
3The mol ratio of OK and tetrafluoroethylene is controlled at 1: 1.0～and 1.2; (7) reactor is placed allow it slowly be warming up to room temperature under the room temperature condition, reactor is stirred tetrafluoroethylene and CF by magnetic stirring apparatus
3OK reacted in closed reactor 24～72 hours; (8) derive the gas of producing in the reactor by gas collector, then carry out rectifying separation, namely obtain target product CF
3OCF=CF
2
Preparation method of the present invention, take Potassium monofluoride, carbonyl fluoride and tetrafluoroethylene as starting raw material, take acetonitrile as solvent, in the situation of catalyst-free effect, preparation CF
3OK, then under the condition that has a small amount of water to exist, and tetrafluoroethylene reacts preparation target product perfluoro methyl vinyl ether; Because whole process reaction temperature is normal temperature, and the reaction pressure of the first step is normal pressure; The reaction of second step also need not the external world and exerts pressure, so compared with prior art, these reaction conditionss are realized easily, also easily control; In addition, the employed simple in equipment of this preparation process is so the cost of whole production process is lower; In preparation process, intermediate product does not need high purity separation, so the separating step in the middle of having reduced has reduced synthetic cost, simultaneously, in building-up process, the solvent acetonitrile recycling use does not enter airspace, thus pollution-free, environmental friendliness; Therefore, the method can be applied to large-scale industrial production.
Embodiment
Embodiment 1:
Under (1) 250 ℃ of condition, in retort furnace KF is dried, the time is 3 hours; (2) by the method for weighing, the KF of 80mmol is put into the tetrafluoroethylene reactor of 150ml, and add the acetonitrile of 500mmol, the entrance of reactor connects COF
2Steel cylinder, stirring and dissolving 10 minutes; (3) reactor inlet, be connected with carbonyl fluoride, outlet connects the acetonitrile receiving flask successively, and the carbonyl fluoride receiving flask is emptying behind washing and the alkaline cleaner; Open the carbonyl fluoride steel cylinder switch, by reducing valve, with the flow of 0.5mmol/min, under agitation condition, carbonyl fluoride is joined in the acetonitrile solution, the time of passing into is 3 hours, and the add-on of carbonyl fluoride is 90mmol; (4) stop to pass into carbonyl fluoride, the flow of using nitrogen 1.5mmol/min instead purges 10min to reactor, removes the COF in the reactor
2, namely obtain CF
3The acetonitrile solution of OK; (5) CF of transfer 10mmol
3The OK acetonitrile solution and adds the deionized water of magnetic stir bar and 0.05mmol in reactor in closed reactor; Then reactor is connected on the vacuum line, under the condition of using liquid nitrogen that reactor is cooled off, vacuumizes and remove the reactor Air; (6) by vacuum line, in reactor, accurately add the tetrafluoroethylene of 10mmol; (7) at ambient temperature, by magnetic stirring apparatus reactor is stirred tetrafluoroethylene and CF
3OK reacted in closed reactor 24 hours; (8) derive the gas of producing in the reactor by gas collector, namely obtain target product CF
3OCF=CF
2By chromatograph the ultimate aim product of present embodiment is analyzed, drawn that PMVE content is 54.97% in the final synthetic product of present embodiment.
Embodiment 2:
Under (1) 300 ℃ of condition, in retort furnace KF is dried, the time is 2.5 hours; (2) by the method for weighing, the KF of 100mmol is put into the tetrafluoroethylene reactor of 150ml, and add the acetonitrile of 500mmol, the entrance of reactor connects COF
2Steel cylinder, stirring and dissolving 15 minutes; (3) reactor inlet, be connected with carbonyl fluoride, outlet connects the acetonitrile receiving flask successively, and the carbonyl fluoride receiving flask is emptying behind washing and the alkaline cleaner; Open the carbonyl fluoride steel cylinder switch, by reducing valve, with the flow of 0.4mmol/min, under agitation condition, carbonyl fluoride is joined in the acetonitrile solution, the time of passing into is 5 hours, and the add-on of carbonyl fluoride is 120mmol; (4) stop to pass into carbonyl fluoride, the flow of using nitrogen 1.5mmol/min instead purges 15min to reactor, removes the COF in the reactor
2, namely obtain CF
3The acetonitrile solution of OK; (5) CF of transfer 10mmol
3The OK acetonitrile solution and adds the deionized water of magnetic stir bar and 0.02mmol in reactor in closed reactor; Then reactor is connected on the vacuum line, under the condition of using liquid nitrogen that reactor is cooled off, vacuumizes and remove the reactor Air; (6) by vacuum line, in reactor, accurately add the tetrafluoroethylene of 12mmol; (7) at ambient temperature, by magnetic stirring apparatus reactor is stirred tetrafluoroethylene and CF
3OK reacted in closed reactor 72 hours; (8) derive the gas of producing in the reactor by gas collector, then carry out rectifying separation, namely obtain target product CF
3OCF=CF
2Derive the gas of producing in the reactor by gas collector, then carry out rectifying separation, namely obtain target product CF
3OCF=CF
2By chromatograph the crude product of present embodiment is analyzed, drawn that PMVE content is 72.5% in the final synthetic product of present embodiment.
Claims (15)
1. the manufacture method of perfluoro methyl vinyl ether is characterized in that: be CF with structural formula
3The trifluoromethoxy salt of OM and tetrafluoroethylene reaction and making, described reaction conditions is: under normal temperature, secluding air condition, to being dissolved with in the trifluoromethoxy salts solution, add Trace water, stir and add tetrafluoroethylene reaction, described CF in solution down
3The mol ratio of OM and water is 1:0.005 ~ 0.01, and described M is basic metal or alkaline-earth metal.
2. preparation method according to claim 1, described M is potassium or sodium.
3. preparation method according to claim 1, wherein the solvent of trifluoromethoxy salts solution is polar aprotic solvent.
4. preparation method according to claim 3, described polar aprotic solvent is acetonitrile.
5. preparation method according to claim 1, described CF
3The mol ratio of OM and tetrafluoroethylene is 1:1.0 ~ 1.2, and the time of described reaction is 24 ~ 72 hours.
6. preparation method according to claim 1, described perfluoro methyl vinyl ether is to derive the gas of producing in the reactor by gas collector, then carries out rectifying separation and obtains.
7. preparation method according to claim 1, described trifluoromethoxy salt makes by the following method: adopt the reaction of carbonyl fluoride and metal fluoride and obtain.
8. preparation method according to claim 7, the reaction conditions when wherein trifluoromethoxy salt prepares is: under the room temperature, pass into carbonyl fluoride gas in the solution that is dissolved with metal fluoride, the mol ratio of metal fluoride and carbonyl fluoride is 1:2.
9. preparation method according to claim 8, the pressure that described carbonyl fluoride gas passes into is 1 ~ 5 normal atmosphere, its reaction times is 3 ~ 5 hours.
10. preparation method according to claim 7, the solvent of metal fluoride solution was polar aprotic solvent when wherein trifluoromethoxy salt prepared, the mol ratio of metal fluoride and polar aprotic solvent is 1:8 ~ 1:12.
11. preparation method according to claim 10, employing nitrogen purging after wherein trifluoromethoxy salt preparation feedback is finished is taken away gas in the reaction vessel with nitrogen, is communicated with COF on the described reaction vessel
2Retrieving arrangement, water washing device and alkaline cleaner.
12. preparation method according to claim 11, the mixture that obtains after described reaction is finished is directly used in the preparation of perfluoro methyl vinyl ether.
13. preparation method according to claim 8 need do except water treatment before the described metal fluoride reaction.
14. preparation method according to claim 13, described water-eliminating method, is dried metal fluoride under 250 ~ 300 ℃ of conditions for by retort furnace, and drying time is 2 ~ 3 hours, to remove the crystal water in the metal fluoride.
15. preparation method according to claim 1, described secluding air condition are that oxygen content is lower than 1ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110088685 CN102211983B (en) | 2011-04-08 | 2011-04-08 | Preparation method of perfluoromethyl vinyl ether |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110088685 CN102211983B (en) | 2011-04-08 | 2011-04-08 | Preparation method of perfluoromethyl vinyl ether |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102211983A CN102211983A (en) | 2011-10-12 |
| CN102211983B true CN102211983B (en) | 2013-03-20 |
Family
ID=44743553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110088685 Active CN102211983B (en) | 2011-04-08 | 2011-04-08 | Preparation method of perfluoromethyl vinyl ether |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102211983B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105367392B (en) * | 2014-08-12 | 2017-10-03 | 中化近代环保化工(西安)有限公司 | A kind of preparation method of perfluoro methyl vinyl ether |
| CN107286060A (en) * | 2017-06-22 | 2017-10-24 | 山东华夏神舟新材料有限公司 | End group is the preparation method of the perfluoroalkyl vinyl ether of sulfonyl fluoride group |
| CN109956855B (en) * | 2017-12-25 | 2022-04-15 | 中蓝晨光化工研究设计院有限公司 | Preparation method of high-purity perfluoromethyl vinyl ether |
| KR102477300B1 (en) * | 2020-07-07 | 2022-12-13 | 한국화학연구원 | Method for preparing perfluoropropyl vinyl ether with high conversion rate |
| KR102477162B1 (en) * | 2020-07-07 | 2022-12-13 | 한국화학연구원 | Method for preparing perfluoromethyl vinyl ether with high conversion rate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3291843A (en) * | 1963-10-08 | 1966-12-13 | Du Pont | Fluorinated vinyl ethers and their preparation |
| US20110082312A1 (en) * | 2008-05-19 | 2011-04-07 | Merck Patent Gesellschaft Mit Deschrankter Haftung | Production of compounds comprising cf30 groups |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2772846B2 (en) * | 1990-03-15 | 1998-07-09 | 日本メクトロン株式会社 | Fluorine-containing allyl ether and its production method |
-
2011
- 2011-04-08 CN CN 201110088685 patent/CN102211983B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3291843A (en) * | 1963-10-08 | 1966-12-13 | Du Pont | Fluorinated vinyl ethers and their preparation |
| US20110082312A1 (en) * | 2008-05-19 | 2011-04-07 | Merck Patent Gesellschaft Mit Deschrankter Haftung | Production of compounds comprising cf30 groups |
Non-Patent Citations (7)
| Title |
|---|
| JP平3-264545A 1991.11.25 |
| Ming-H. Hung等.Synthesis of Perfluorovinyl Ether Monomers.《J.Org.Chem.》.1994,第59卷(第15期), |
| New perfluorovinylethers through the bis(fluoroxy)difluoromethane (BDM) chemistry;Walter Navarrinia等;《Journal of Fluorine Chemistry》;20040229;第125卷(第2期);第189-197页 * |
| Synthesis of Perfluorovinyl Ether Monomers;Ming-H. Hung等;《J.Org.Chem.》;19940731;第59卷(第15期);第4332-4335页 * |
| Walter Navarrinia等.New perfluorovinylethers through the bis(fluoroxy)difluoromethane (BDM) chemistry.《Journal of Fluorine Chemistry》.2004,第125卷(第2期), |
| 王家浚等.相转移法催化合成原乙酸三甲酯.《天津化工》.2003,第17卷(第6期), |
| 相转移法催化合成原乙酸三甲酯;王家浚等;《天津化工》;20031220;第17卷(第6期);第31-32页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102211983A (en) | 2011-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102211983B (en) | Preparation method of perfluoromethyl vinyl ether | |
| CN103254041B (en) | A kind of preparation method of hydrogen fluorine ether | |
| US8981162B2 (en) | Method for preparing fluorine-containing vinyl ether | |
| CN101213168A (en) | Method of making fluorinated vinyl ethers | |
| CN103772156B (en) | Method of continuous catalytic synthesis of 1-alkoxyl-1,1,2,2-tetrafluoroethane in fixed bed | |
| CN106588658B (en) | Method for synthesizing dimethyl carbonate | |
| CN105859553B (en) | A kind of preparation process of ethyl difluoro | |
| CN105693463A (en) | Method for preparing C2-C6 perfluoroalkane | |
| CN104971774A (en) | Preparation method for hydrofluoroether and catalyst thereof | |
| CN101168116A (en) | Method for recovering tail gas generated by tetrafluoroethylene | |
| CN103724167B (en) | Environment-friendly synthesis method of high-yield perfluoromethylvinyl ether (PMVE) | |
| CN115433158A (en) | Production method of tetrafluoroethane-beta-sultone | |
| CN102603461A (en) | Method for preparing 1,2-dibromotetrafluoroethane from tail gas in production of tetrafluoroethylene | |
| CN105523982A (en) | Method for preparing tert-butyl hydroperoxide | |
| CN105753661A (en) | Polyether-type hydrofluoroether and preparation method thereof | |
| CN107602733B (en) | A kind of fluorine-containing emulsifier and the method for preparing fluorine-containing emulsifier using plasma | |
| CN109665942B (en) | Preparation method of fluorine-containing ether compound | |
| CN109305893B (en) | Synthesis method and synthesis device of 1, 2-difluoroethylene trifluoromethyl ether | |
| CN111378064B (en) | Preparation method of perfluorosulfonyl fluororesin | |
| CN114031578A (en) | Mixed solvent and application thereof in synthesis of hexafluoropropylene oxide through epoxidation of hexafluoropropylene | |
| CN114057562B (en) | Preparation method of 4, 4-trifluoro-butyric acid | |
| CN111389424A (en) | Catalyst, preparation method and application in hexafluoropropylene oligomerization reaction | |
| CN117510454B (en) | Preparation method of chloroethylene carbonate | |
| CN105037113A (en) | Synthesis method of carbonic acid ortho-ester | |
| CN101177243A (en) | Method for producing hydrogen fluoride under the condition of environment protection low temperature liquid condition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210608 Address after: 362000 west side of 11 / F, youth building, 288 Tian'an North Road, Fengze District, Quanzhou City, Fujian Province Patentee after: Quanzhou Yuji New Material Technology Co.,Ltd. Address before: 100081 room 2111, 21 / F, science and technology building, 5 Zhongguancun South Street, Haidian District, Beijing Patentee before: BEIJING YUJI SCIENCE AND TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |