DE68907511D1 - Verfahren zur rueckgewinnung des entparaffinierungshilfsmittels mittels einer asymmetrischen ultrafiltrationsmembran aus polyimid. - Google Patents

Verfahren zur rueckgewinnung des entparaffinierungshilfsmittels mittels einer asymmetrischen ultrafiltrationsmembran aus polyimid.

Info

Publication number
DE68907511D1
DE68907511D1 DE8989303061T DE68907511T DE68907511D1 DE 68907511 D1 DE68907511 D1 DE 68907511D1 DE 8989303061 T DE8989303061 T DE 8989303061T DE 68907511 T DE68907511 T DE 68907511T DE 68907511 D1 DE68907511 D1 DE 68907511D1
Authority
DE
Germany
Prior art keywords
deparaffinating
polyimide
recovery
agent
ultrafiltration membrane
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
Application number
DE8989303061T
Other languages
English (en)
Other versions
DE68907511T2 (de
Inventor
Wan-Kei Wan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Exxon Research and Engineering Co filed Critical Exxon Research and Engineering Co
Publication of DE68907511D1 publication Critical patent/DE68907511D1/de
Application granted granted Critical
Publication of DE68907511T2 publication Critical patent/DE68907511T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
DE89303061T 1988-03-28 1989-03-28 Verfahren zur Rückgewinnung des Entparaffinierungshilfsmittels mittels einer asymmetrischen Ultrafiltrationsmembran aus Polyimid. Expired - Fee Related DE68907511T2 (de)

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 true DE68907511D1 (de) 1993-08-19
DE68907511T2 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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
US4836927A (en) 1989-06-06
JPH028295A (ja) 1990-01-11
DE68907511T2 (de) 1993-10-21
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