DE1923845A1 - Verfahren zur Reinigung von aromatischen Dianhydriden - Google Patents

Verfahren zur Reinigung von aromatischen Dianhydriden

Info

Publication number
DE1923845A1
DE1923845A1 DE19691923845 DE1923845A DE1923845A1 DE 1923845 A1 DE1923845 A1 DE 1923845A1 DE 19691923845 DE19691923845 DE 19691923845 DE 1923845 A DE1923845 A DE 1923845A DE 1923845 A1 DE1923845 A1 DE 1923845A1
Authority
DE
Germany
Prior art keywords
anhydride
dianhydrides
aromatic
dianhydride
complexes
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Withdrawn
Application number
DE19691923845
Other languages
German (de)
English (en)
Inventor
Maurice Balme
Bernard Rollet
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.)
Rhone Poulenc SA
Original Assignee
Rhone Poulenc SA
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 Rhone Poulenc SA filed Critical Rhone Poulenc SA
Publication of DE1923845A1 publication Critical patent/DE1923845A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/54—Preparation of carboxylic acid anhydrides
    • C07C51/573—Separation; Purification; Stabilisation; Use of additives

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
DE19691923845 1968-05-09 1969-05-09 Verfahren zur Reinigung von aromatischen Dianhydriden Withdrawn DE1923845A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR151198 1968-05-09

Publications (1)

Publication Number Publication Date
DE1923845A1 true DE1923845A1 (de) 1969-11-20

Family

ID=8650038

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19691923845 Withdrawn DE1923845A1 (de) 1968-05-09 1969-05-09 Verfahren zur Reinigung von aromatischen Dianhydriden

Country Status (3)

Country Link
DE (1) DE1923845A1 (cg-RX-API-DMAC10.html)
FR (1) FR1574843A (cg-RX-API-DMAC10.html)
GB (1) GB1226695A (cg-RX-API-DMAC10.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54106599A (en) * 1978-02-09 1979-08-21 Hitachi Chem Co Ltd Preparation of polyamide intermediate for semiconductor processing
JPH0390076A (ja) * 1989-09-01 1991-04-16 Hitachi Ltd 酸無水物錯体とその製造法、該錯体を含む組成物等

Also Published As

Publication number Publication date
GB1226695A (cg-RX-API-DMAC10.html) 1971-03-31
FR1574843A (cg-RX-API-DMAC10.html) 1969-07-18

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
EHJ Ceased/non-payment of the annual fee