DE68907511T2 - Verfahren zur Rückgewinnung des Entparaffinierungshilfsmittels mittels einer asymmetrischen Ultrafiltrationsmembran aus Polyimid. - Google Patents
Verfahren zur Rückgewinnung des Entparaffinierungshilfsmittels mittels einer asymmetrischen Ultrafiltrationsmembran aus Polyimid.Info
- Publication number
- DE68907511T2 DE68907511T2 DE89303061T DE68907511T DE68907511T2 DE 68907511 T2 DE68907511 T2 DE 68907511T2 DE 89303061 T DE89303061 T DE 89303061T DE 68907511 T DE68907511 T DE 68907511T DE 68907511 T2 DE68907511 T2 DE 68907511T2
- Authority
- DE
- Germany
- Prior art keywords
- polyimide
- recovery
- ultrafiltration membrane
- membrane made
- dewaxing aid
- 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.)
- Expired - Fee Related
Links
- 239000004642 Polyimide Substances 0.000 title 1
- 239000012528 membrane Substances 0.000 title 1
- 238000000034 method Methods 0.000 title 1
- 229920001721 polyimide Polymers 0.000 title 1
- 238000011084 recovery Methods 0.000 title 1
- 238000000108 ultra-filtration Methods 0.000 title 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/58—Other polymers having nitrogen in the main chain, with or without oxygen or carbon only
- B01D71/62—Polycondensates having nitrogen-containing heterocyclic rings in the main chain
- B01D71/64—Polyimides; Polyamide-imides; Polyester-imides; Polyamide acids or similar polyimide precursors
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/172,753 US4836927A (en) | 1988-03-28 | 1988-03-28 | Recovery of dewaxing aid using asymmetric polyimide ultrafiltration membrane and method for producing said membrane |
Publications (2)
Publication Number | Publication Date |
---|---|
DE68907511D1 DE68907511D1 (de) | 1993-08-19 |
DE68907511T2 true DE68907511T2 (de) | 1993-10-21 |
Family
ID=22629078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE89303061T Expired - Fee Related DE68907511T2 (de) | 1988-03-28 | 1989-03-28 | Verfahren zur Rückgewinnung des Entparaffinierungshilfsmittels mittels einer asymmetrischen Ultrafiltrationsmembran aus Polyimid. |
Country Status (4)
Country | Link |
---|---|
US (1) | US4836927A (de) |
EP (1) | EP0335667B1 (de) |
JP (1) | JPH028295A (de) |
DE (1) | DE68907511T2 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4963303A (en) * | 1989-02-16 | 1990-10-16 | Exxon Research & Engineering Company | Ultrafiltration polyimide membrane and its use for recovery of dewaxing aid |
US4908134A (en) * | 1989-02-16 | 1990-03-13 | Exxon Research And Engineering Company | Ultrafiltration polyamide membrane and its use for recovery of dewaxing aid (OP-3454) |
US4985138A (en) * | 1989-11-08 | 1991-01-15 | Texaco Inc. | Process for treating a charge containing dewaxing solvent and dewaxed oil |
US5045354A (en) * | 1989-12-19 | 1991-09-03 | Exxon Research & Engineering Company | Production of supported thin film membranes |
US5220379A (en) * | 1990-07-26 | 1993-06-15 | Konica Corporation | Color image forming apparatus |
US5240591A (en) * | 1991-09-03 | 1993-08-31 | Texaco Inc. | Membrane process for separating a mixture containing dewaxed oil and dewaxing solvent |
US5264166A (en) * | 1993-04-23 | 1993-11-23 | W. R. Grace & Co.-Conn. | Polyimide membrane for separation of solvents from lube oil |
US5358625A (en) * | 1993-04-23 | 1994-10-25 | Mobile Oil Corporation | Lubricating oil dewaxing using membrane separation of cold solvent from dewaxed oil |
US5360530A (en) * | 1993-04-23 | 1994-11-01 | Mobil Oil Corporation | Lubricating oil dewaxing using membrane separation of cold solvent from dewaxed oil and recycle of cold solvent to filter feed |
US6180008B1 (en) | 1998-07-30 | 2001-01-30 | W. R. Grace & Co.-Conn. | Polyimide membranes for hyperfiltration recovery of aromatic solvents |
US6382519B1 (en) | 2000-05-22 | 2002-05-07 | Bong Kyu Choi | Assembling type unit track member for toy vehicles |
US7250545B2 (en) * | 2003-01-27 | 2007-07-31 | L'air Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude At L'exploration Des Procedes Georges Claude | Method of separating olefins from mixtures with paraffins |
US7025804B2 (en) * | 2002-12-02 | 2006-04-11 | L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | Method for separating hydrocarbon-containing gas mixtures using hydrocarbon-resistant membranes |
US7393383B2 (en) * | 2005-01-14 | 2008-07-01 | L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | Separation membrane made from blends of polyimide with polyamide or polyimide-amide polymers |
US7422623B2 (en) * | 2005-03-02 | 2008-09-09 | L'air Liquide, Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | Separation membrane by controlled annealing of polyimide polymers |
US8101009B2 (en) * | 2005-03-02 | 2012-01-24 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Separation membrane by controlled annealing of polyimide polymers |
CN109694746B (zh) * | 2017-10-24 | 2021-11-19 | 中国石油化工股份有限公司 | 润滑油原料油脱蜡溶剂的回收方法和润滑油原料油脱蜡的方法 |
CN109694745B (zh) * | 2017-10-24 | 2021-09-21 | 中国石油化工股份有限公司 | 重质润滑油原料油脱蜡溶剂的回收方法和重质润滑油原料油脱蜡的方法 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3708458A (en) * | 1971-03-16 | 1973-01-02 | Upjohn Co | Copolyimides of benzophenone tetracarboxylic acid dianhydride and mixture of diisocyanates |
DK143986C (da) * | 1973-04-12 | 1982-04-26 | Berghof Forschungsinst | Fremgangsmaade til fremstilling af uoploeselige asymmetriske polyimidmembraner |
JPS5471785A (en) * | 1977-11-18 | 1979-06-08 | Nitto Electric Ind Co Ltd | Selectively permeable membrane and production thereof |
US4192732A (en) * | 1978-07-21 | 1980-03-11 | Toa Nenryo Kogyo Kabushiki Kaisha | Recovery and recycle of dewaxing aid |
JPS5827963B2 (ja) * | 1979-05-17 | 1983-06-13 | 日東電工株式会社 | 選択性透過膜の製造方法 |
EP0023406B1 (de) * | 1979-07-26 | 1983-04-13 | Ube Industries, Ltd. | Verfahren zur Herstellung semipermeabler, aromatischer Polyimidmembranen |
CA1202837A (en) * | 1980-03-14 | 1986-04-08 | Wolfgang J. Wrasidlo | Asymmetric membranes and process therefor |
JPS5854841B2 (ja) * | 1980-03-31 | 1983-12-07 | 日東電工株式会社 | 選択性透過膜の製造方法 |
US4307135A (en) * | 1980-04-08 | 1981-12-22 | The United States Of America As Represented By The Secretary Of The Interior | Process for preparing an asymmetric permselective membrane |
BR8102065A (pt) * | 1980-04-08 | 1981-10-13 | Brunswick Corp | Membrana de ultrafiltracao assimetrica polimera integral |
JPS57170936A (en) * | 1981-04-14 | 1982-10-21 | Ube Ind Ltd | Preparation of porous polyimide film |
GB2101137B (en) * | 1981-04-14 | 1984-09-26 | Ube Industries | Producing porous aromatic imide polymer membranes |
GB2104411B (en) * | 1981-07-08 | 1985-02-20 | Ube Industries | Aromatic polyimide composite separating membrane |
US4532041A (en) * | 1983-05-13 | 1985-07-30 | Exxon Research And Engineering Co. | Asymmetric polyimide reverse osmosis membrane, method for preparation of same and use thereof for organic liquid separations |
JPS60193505A (ja) * | 1983-12-01 | 1985-10-02 | エクソン・リサ−チ・アンド・エンジニアリング・カンパニ− | 選択性膜をスパイラル状部材で使用する限外濾過によつて脱ワツクス助剤を回収する方法 |
AR242427A1 (es) * | 1984-03-12 | 1993-03-31 | Exxon Research Engineering Co | Procedimiento de desparafinacion |
US4571444A (en) * | 1984-04-27 | 1986-02-18 | Exxon Research And Engineering Co. | Process for separating alkylaromatics from aromatic solvents and the separation of the alkylaromatic isomers using membranes |
US4606903A (en) * | 1984-04-27 | 1986-08-19 | Exxon Research And Engineering Co. | Membrane separation of uncoverted carbon fiber precursors from flux solvent and/or anti-solvent |
-
1988
- 1988-03-28 US US07/172,753 patent/US4836927A/en not_active Expired - Fee Related
-
1989
- 1989-03-20 JP JP1069110A patent/JPH028295A/ja active Pending
- 1989-03-28 DE DE89303061T patent/DE68907511T2/de not_active Expired - Fee Related
- 1989-03-28 EP EP89303061A patent/EP0335667B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US4836927A (en) | 1989-06-06 |
JPH028295A (ja) | 1990-01-11 |
DE68907511D1 (de) | 1993-08-19 |
EP0335667A3 (en) | 1990-04-25 |
EP0335667A2 (de) | 1989-10-04 |
EP0335667B1 (de) | 1993-07-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |