JPH022888B2 - - Google Patents

Info

Publication number
JPH022888B2
JPH022888B2 JP56170893A JP17089381A JPH022888B2 JP H022888 B2 JPH022888 B2 JP H022888B2 JP 56170893 A JP56170893 A JP 56170893A JP 17089381 A JP17089381 A JP 17089381A JP H022888 B2 JPH022888 B2 JP H022888B2
Authority
JP
Japan
Prior art keywords
glycol ether
polytetramethylene glycol
bleaching earth
tetrahydrofuran
bleaching
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 - Lifetime
Application number
JP56170893A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57100132A (en
Inventor
Myuraa Heruberuto
Heruman Fuukuraa Otsutoo
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of JPS57100132A publication Critical patent/JPS57100132A/ja
Publication of JPH022888B2 publication Critical patent/JPH022888B2/ja
Granted legal-status Critical Current

Links

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
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • C07D307/04—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
    • C07D307/06—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to ring carbon atoms
    • C07D307/08—Preparation of tetrahydrofuran
    • 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
    • C08G65/04—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 only
    • C08G65/06—Cyclic ethers having no atoms other than carbon and hydrogen outside the ring
    • C08G65/16—Cyclic ethers having four or more ring atoms
    • C08G65/20—Tetrahydrofuran
    • 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
    • C08G65/32—Polymers modified by chemical after-treatment
    • C08G65/321—Polymers modified by chemical after-treatment with inorganic compounds
    • C08G65/324—Polymers modified by chemical after-treatment with inorganic compounds containing oxygen
    • 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
    • C08G2650/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G2650/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterized by the type of post-polymerisation functionalisation
    • C08G2650/12—Depolymerisation, e.g. to reform the monomer

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Polyethers (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Furan Compounds (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
JP56170893A 1980-11-14 1981-10-27 Depolymerization of polytetramethylene glycol ether Granted JPS57100132A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803042960 DE3042960A1 (de) 1980-11-14 1980-11-14 Verfahren zur depolymerisation von polytetramethylenglykolether

Publications (2)

Publication Number Publication Date
JPS57100132A JPS57100132A (en) 1982-06-22
JPH022888B2 true JPH022888B2 (en:Method) 1990-01-19

Family

ID=6116764

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56170893A Granted JPS57100132A (en) 1980-11-14 1981-10-27 Depolymerization of polytetramethylene glycol ether

Country Status (4)

Country Link
US (1) US4363924A (en:Method)
EP (1) EP0052213B1 (en:Method)
JP (1) JPS57100132A (en:Method)
DE (2) DE3042960A1 (en:Method)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3505152A1 (de) * 1985-02-15 1986-09-04 Basf Ag, 6700 Ludwigshafen Verfahren zur einengung der molekulargewichtsverteilung von polytetrahydrofuran
DE3541155A1 (de) * 1985-11-21 1987-05-27 Basf Ag Verfahren zur depolymerisation von polyoxibutylenpolyoxialkylenglykolen und polyoxibutylenpolyoxialkylenethern
DE4132895A1 (de) * 1991-10-04 1993-04-08 Basf Ag Verfahren zur reaktivierung von montmorillonit-katalysatoren
US5208385A (en) * 1992-02-19 1993-05-04 Arco Chemical Technology, L.P. Preparation of tetrahydrofuran polymers having a narrow molecular weight distribution using an amorphous silica-alumina catalyst
US5210283A (en) * 1992-05-18 1993-05-11 Arco Chemical Technology, L.P. Synthesis of tetrahydrofuran polymers using calcined silica-alumina or beaching earth catalysts
US5541346A (en) * 1992-10-21 1996-07-30 E. I. Du Pont De Nemours And Company Polymerization of, and depolymerization to, cyclic ethers using selected metal compound catalysts
DE19715831A1 (de) 1997-04-16 1998-10-22 Basf Ag Verfahren zur Entfärbung von Polymerisaten oder Copolymerisaten des Tetrahydrofurans
WO2008086919A1 (de) * 2007-01-19 2008-07-24 Basf Se Verfahren zur änderung des vorgegebenen mittleren molekulargewicht mn bei der kontinuierlichen herstellung von polytetrahydrofuranen oder thf copolymeren
KR101560420B1 (ko) * 2007-09-06 2015-10-15 바스프 에스이 폴리테트라히드로푸란의 모노- 및/또는 디에스테르를 함유하는 혼합물의 해중합 방법
ES2449442T3 (es) 2009-12-11 2014-03-19 Invista Technologies S.À.R.L. Despolimerización de éteres cíclicos oligoméricos
CN112961122B (zh) * 2021-02-22 2024-03-26 新疆蓝山屯河能源有限公司 聚四氢呋喃在无水环境下全部解聚的方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2751419A (en) * 1954-09-13 1956-06-19 Du Pont Process for purification of polytetramethyleneether
GB854958A (en) * 1957-03-14 1960-11-23 Bayer Ag Copolymerising mono-epoxides with tetrahydrofurane
DE1226560B (de) * 1964-12-30 1966-10-13 Hoechst Ag Verfahren zur Herstellung von Butylenglykoldiacetaten
US3925484A (en) * 1973-11-08 1975-12-09 Du Pont Process for making polytetramethylene ether glycol having a narrow molecular weight distribution
US4115408A (en) * 1977-08-05 1978-09-19 E.I. Dupont De Nemours And Company Conversion of poly(tetramethylene ether) glycol in aqueous effluent stream to tetrahydrofuran
DE2748788A1 (de) * 1977-10-31 1979-05-03 Basf Ag Verfahren zur reinigung von tetrahydrofuran
US4192943A (en) * 1978-06-13 1980-03-11 E. I. Du Pont De Nemours And Company Method for reducing oligomeric cyclic ether content of a polymerizate
JPS5661048A (en) * 1979-10-22 1981-05-26 Nippon Telegr & Teleph Corp <Ntt> Optical memory medium

Also Published As

Publication number Publication date
JPS57100132A (en) 1982-06-22
EP0052213B1 (de) 1985-05-02
US4363924A (en) 1982-12-14
DE3170308D1 (en) 1985-06-05
EP0052213A1 (de) 1982-05-26
DE3042960A1 (de) 1982-07-08

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