DE3016113A1 - Verfahren zur aufarbeitung von polyetherpolyolen - Google Patents
Verfahren zur aufarbeitung von polyetherpolyolenInfo
- Publication number
- DE3016113A1 DE3016113A1 DE19803016113 DE3016113A DE3016113A1 DE 3016113 A1 DE3016113 A1 DE 3016113A1 DE 19803016113 DE19803016113 DE 19803016113 DE 3016113 A DE3016113 A DE 3016113A DE 3016113 A1 DE3016113 A1 DE 3016113A1
- Authority
- DE
- Germany
- Prior art keywords
- emulsion
- water
- process stage
- fibers
- added
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 30
- 229920000570 polyether Polymers 0.000 title claims description 25
- 239000004721 Polyphenylene oxide Substances 0.000 title claims description 22
- 229920005862 polyol Polymers 0.000 title claims description 12
- 150000003077 polyols Chemical class 0.000 title claims description 12
- 238000012545 processing Methods 0.000 title description 3
- 239000000839 emulsion Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 229920000642 polymer Polymers 0.000 claims description 14
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 12
- 239000012074 organic phase Substances 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 7
- 239000008346 aqueous phase Substances 0.000 claims description 7
- 239000012071 phase Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000003463 adsorbent Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 125000002947 alkylene group Chemical group 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 150000007513 acids Chemical class 0.000 claims description 2
- 239000002557 mineral fiber Substances 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 45
- 239000003054 catalyst Substances 0.000 description 11
- 239000002585 base Substances 0.000 description 8
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 7
- 239000012528 membrane Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 4
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 4
- 238000005119 centrifugation Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000012299 nitrogen atmosphere Substances 0.000 description 4
- 238000005191 phase separation Methods 0.000 description 4
- 239000011591 potassium Substances 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 238000010626 work up procedure Methods 0.000 description 2
- BEGTYOYMERGIDU-UHFFFAOYSA-N 5-methyloxonane Chemical compound CC1CCCCOCCC1 BEGTYOYMERGIDU-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- XCOBTUNSZUJCDH-UHFFFAOYSA-B lithium magnesium sodium silicate Chemical compound [Li+].[Li+].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Na+].[Na+].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3.O1[Si](O2)([O-])O[Si]3([O-])O[Si]1([O-])O[Si]2([O-])O3 XCOBTUNSZUJCDH-UHFFFAOYSA-B 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000004792 oxidative damage Effects 0.000 description 1
- 229920000233 poly(alkylene oxides) Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/30—Post-polymerisation treatment, e.g. recovery, purification, drying
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
- C08G65/2603—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen
- C08G65/2606—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen containing hydroxyl groups
- C08G65/2609—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen containing hydroxyl groups containing aliphatic hydroxyl groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
- C08G65/2642—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds characterised by the catalyst used
- C08G65/2645—Metals or compounds thereof, e.g. salts
- C08G65/2648—Alkali metals or compounds thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyethers (AREA)
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803016113 DE3016113A1 (de) | 1980-04-25 | 1980-04-25 | Verfahren zur aufarbeitung von polyetherpolyolen |
| DE8181102791T DE3165002D1 (en) | 1980-04-25 | 1981-04-11 | Process for working up polyether polyols |
| EP81102791A EP0038983B1 (de) | 1980-04-25 | 1981-04-11 | Verfahren zur Aufarbeitung von Polyetherpolyolen |
| MX186982A MX153635A (es) | 1980-04-25 | 1981-04-23 | Procedimiento mejorado para la eliminacion de alcalide polieterpolioles |
| JP6070681A JPS56167727A (en) | 1980-04-25 | 1981-04-23 | Finishing of polyether polyol |
| ES501636A ES501636A0 (es) | 1980-04-25 | 1981-04-24 | Procedimiento para la elaboracion de polieterpolioles |
| BR8102484A BR8102484A (pt) | 1980-04-25 | 1981-04-24 | Processo para a remocao de alcali de polieter-poliois |
| US06/452,178 US4482750A (en) | 1980-04-25 | 1982-12-22 | Process for removing alkaline catalysts from polyether polyols |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19803016113 DE3016113A1 (de) | 1980-04-25 | 1980-04-25 | Verfahren zur aufarbeitung von polyetherpolyolen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3016113A1 true DE3016113A1 (de) | 1981-10-29 |
Family
ID=6101003
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19803016113 Withdrawn DE3016113A1 (de) | 1980-04-25 | 1980-04-25 | Verfahren zur aufarbeitung von polyetherpolyolen |
| DE8181102791T Expired DE3165002D1 (en) | 1980-04-25 | 1981-04-11 | Process for working up polyether polyols |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE8181102791T Expired DE3165002D1 (en) | 1980-04-25 | 1981-04-11 | Process for working up polyether polyols |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4482750A (cg-RX-API-DMAC7.html) |
| EP (1) | EP0038983B1 (cg-RX-API-DMAC7.html) |
| JP (1) | JPS56167727A (cg-RX-API-DMAC7.html) |
| BR (1) | BR8102484A (cg-RX-API-DMAC7.html) |
| DE (2) | DE3016113A1 (cg-RX-API-DMAC7.html) |
| ES (1) | ES501636A0 (cg-RX-API-DMAC7.html) |
| MX (1) | MX153635A (cg-RX-API-DMAC7.html) |
Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CS241409B1 (en) * | 1983-01-21 | 1986-03-13 | Ladislav Komora | Method of water/soluble polyerthers' and/or copolyethers' refining or at least limitation |
| US4528364A (en) * | 1984-04-19 | 1985-07-09 | The Dow Chemical Company | Removal of alkaline catalysts from polyether polyols and polyalkylene carbonate polyols |
| JPS6454026A (en) * | 1987-08-24 | 1989-03-01 | Dai Ichi Kogyo Seiyaku Co Ltd | Production of modified polyester |
| JP2568251B2 (ja) * | 1988-05-20 | 1996-12-25 | 鐘淵化学工業株式会社 | 粗製ポリエーテルから塩基性アルカリ金属化合物と無機酸との無機塩を除去する方法 |
| RU2089564C1 (ru) * | 1992-03-24 | 1997-09-10 | Дзе Дау Кемикал Компани | Способ получения гидроксифункциональных полиэфиров |
| WO1996020972A2 (en) * | 1995-01-05 | 1996-07-11 | Bayer Corporation | A PROCESS FOR THE REMOVAL OF A pH-BASIC MATERIAL FROM A POLYETHER POLYOL |
| DE19702787A1 (de) * | 1997-01-27 | 1998-07-30 | Bayer Ag | Verfahren zur Herstellung von Polyetherpolyolen |
| AU741367B2 (en) * | 1997-06-30 | 2001-11-29 | Aortech International Plc | Process for the purification of polyethers |
| AUPO761697A0 (en) * | 1997-06-30 | 1997-07-24 | Cardiac Crc Nominees Pty Limited | Process for the purification of polyethers |
| DE19735795A1 (de) * | 1997-08-18 | 1999-02-25 | Bayer Ag | Verfahren zur Herstellung von Polyetherpolyolen |
| US6492565B2 (en) | 1998-10-07 | 2002-12-10 | Bayer Aktiengesellschaft | Process for the preparation of polyether polyols |
| US6376625B1 (en) * | 1999-08-25 | 2002-04-23 | The Dow Chemical Company | Process for purifying polyethers |
| CN1238317C (zh) * | 1999-12-17 | 2006-01-25 | 纳幕尔杜邦公司 | 制备聚三亚甲基醚二醇的连续方法 |
| US6977291B2 (en) * | 1999-12-17 | 2005-12-20 | E.I. Du Pont De Nemours And Company | Production of polytrimethylene ether glycol and copolymers thereof |
| DE10121807A1 (de) | 2001-05-04 | 2002-11-07 | Bayer Ag | Verfahren zur Herstellung von Polyetherpolyolen |
| ATE552228T1 (de) * | 2001-10-24 | 2012-04-15 | Daikin Ind Ltd | Verfahren zur rückgewinnung von katalysatoren in einem verfahren und zur herstellung von perfluoralkyliodid-telomeren |
| US6562457B1 (en) | 2001-10-31 | 2003-05-13 | E. I. Du Pont De Nemours And Company | Polyether ester elastomer comprising polytrimethylene ether ester soft segment and tetramethylene ester hard segment |
| US6599625B2 (en) | 2001-10-31 | 2003-07-29 | E. I. Du Pont De Nemours And Company | Polyether ester elastomer comprising polytrimethylene ether ester soft segment and trimethylene ester hard segment |
| US6852823B2 (en) | 2002-08-09 | 2005-02-08 | E. I. Du Pont De Nemours And Company | Polyurethane and polyurethane-urea elastomers from polytrimethylene ether glycol |
| CA2497332A1 (en) * | 2004-02-19 | 2005-08-19 | Dai-Ichi Kogyo Seiyaku Co., Ltd. | Water soluble nonionic alkylene oxide resin and production process therefor |
| US7186867B2 (en) * | 2004-04-21 | 2007-03-06 | Basf Aktiengesellschaft | Process for preparing reactive polyether polyols having an ethylene oxide end block |
| EP1767563B1 (en) | 2004-07-13 | 2014-09-03 | Kaneka Corporation | Method for producing polyether |
| JP2006321842A (ja) * | 2005-05-17 | 2006-11-30 | Asahi Glass Co Ltd | ポリエーテル類の製造方法 |
| US7495063B2 (en) * | 2006-02-03 | 2009-02-24 | Dow Global Technologies Inc. | Reduced oligomer concentration in high purity polyalkylene glycols |
| EP2669312A1 (en) | 2012-05-29 | 2013-12-04 | Huntsman International Llc | Process for the production of polyether polyols |
| US11572440B2 (en) | 2020-02-18 | 2023-02-07 | Covestro Llc | Methods for purifying polyols containing oxyalkylene units to reduce 2-methyl-2-pentenal content |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE828839C (de) * | 1949-02-09 | 1952-01-21 | Anorgana Fa | Verfahren zur Abtrennung von Polyglykolen aus Gemischen mit Anlagerungsprodukten von Alkylenoxyden an hydroxyl- oder carboxylhaltige organische Verbindungen |
| US3299151A (en) * | 1963-10-08 | 1967-01-17 | Pittsburgh Plate Glass Co | Preparation of polyether polyols |
| FR1488686A (cg-RX-API-DMAC7.html) * | 1965-08-06 | 1967-10-25 | ||
| US3489680A (en) * | 1967-10-30 | 1970-01-13 | Mobil Oil Corp | Method for breaking a water-in-oil emulsion |
| US3823145A (en) * | 1968-07-26 | 1974-07-09 | Basf Wyandotte Corp | Removal of impurities from polyols |
| US3582491A (en) * | 1969-06-12 | 1971-06-01 | Wyandotte Chemicals Corp | Removal of inorganic catalysts from polyols |
| US3715402A (en) * | 1969-08-08 | 1973-02-06 | Basf Wyandotte Corp | Removal of catalysts from polyols |
| JPS4733199U (cg-RX-API-DMAC7.html) * | 1971-05-15 | 1972-12-13 | ||
| JPS5037036B2 (cg-RX-API-DMAC7.html) * | 1972-06-02 | 1975-11-29 | ||
| JPS53123499A (en) * | 1977-04-05 | 1978-10-27 | Asahi Denka Kogyo Kk | Purification of polyether |
| US4240908A (en) * | 1977-08-05 | 1980-12-23 | Mapco, Inc. | Coated metal fiber coalescing cell |
| US4129718A (en) * | 1977-12-01 | 1978-12-12 | Basf Wyandotte Corporation | Process for the removal of catalyst from polyether polyol |
| DE2854541A1 (de) * | 1978-12-16 | 1980-06-26 | Bayer Ag | Verfahren zur reinigung nichtionischer emulgatoren |
-
1980
- 1980-04-25 DE DE19803016113 patent/DE3016113A1/de not_active Withdrawn
-
1981
- 1981-04-11 DE DE8181102791T patent/DE3165002D1/de not_active Expired
- 1981-04-11 EP EP81102791A patent/EP0038983B1/de not_active Expired
- 1981-04-23 JP JP6070681A patent/JPS56167727A/ja active Granted
- 1981-04-23 MX MX186982A patent/MX153635A/es unknown
- 1981-04-24 BR BR8102484A patent/BR8102484A/pt unknown
- 1981-04-24 ES ES501636A patent/ES501636A0/es active Granted
-
1982
- 1982-12-22 US US06/452,178 patent/US4482750A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0038983A3 (en) | 1982-09-22 |
| ES8207566A1 (es) | 1982-09-16 |
| JPS643220B2 (cg-RX-API-DMAC7.html) | 1989-01-20 |
| US4482750A (en) | 1984-11-13 |
| JPS56167727A (en) | 1981-12-23 |
| MX153635A (es) | 1986-12-09 |
| ES501636A0 (es) | 1982-09-16 |
| DE3165002D1 (en) | 1984-08-30 |
| BR8102484A (pt) | 1982-01-05 |
| EP0038983B1 (de) | 1984-07-25 |
| EP0038983A2 (de) | 1981-11-04 |
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