GB1340463A - Process for the production of 3,4-3,4-benzophenone-tetra carboxylic dianhydride - Google Patents

Process for the production of 3,4-3,4-benzophenone-tetra carboxylic dianhydride

Info

Publication number
GB1340463A
GB1340463A GB1550972A GB1550972A GB1340463A GB 1340463 A GB1340463 A GB 1340463A GB 1550972 A GB1550972 A GB 1550972A GB 1550972 A GB1550972 A GB 1550972A GB 1340463 A GB1340463 A GB 1340463A
Authority
GB
United Kingdom
Prior art keywords
dianhydride
benzophenone
dehydration
acid
april
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
Application number
GB1550972A
Other languages
English (en)
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.)
Gelsenberg AG
Original Assignee
Gelsenberg AG
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 Gelsenberg AG filed Critical Gelsenberg AG
Publication of GB1340463A publication Critical patent/GB1340463A/en
Expired 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
    • C07C51/56—Preparation of carboxylic acid anhydrides from organic acids, their salts, their esters or their halides, e.g. by carboxylation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Furan Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
GB1550972A 1971-04-27 1972-04-04 Process for the production of 3,4-3,4-benzophenone-tetra carboxylic dianhydride Expired GB1340463A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712120505 DE2120505C3 (de) 1971-04-27 1971-04-27 Verfahren zur Gewinnung von reinem 3,4 3\4' Benzophenontetracar bonsauredianhydnd

Publications (1)

Publication Number Publication Date
GB1340463A true GB1340463A (en) 1973-12-12

Family

ID=5806025

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1550972A Expired GB1340463A (en) 1971-04-27 1972-04-04 Process for the production of 3,4-3,4-benzophenone-tetra carboxylic dianhydride

Country Status (3)

Country Link
DE (1) DE2120505C3 (enrdf_load_stackoverflow)
FR (1) FR2134547B1 (enrdf_load_stackoverflow)
GB (1) GB1340463A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
DE2120505C3 (de) 1973-11-29
FR2134547B1 (enrdf_load_stackoverflow) 1976-08-06
DE2120505B2 (de) 1973-05-03
FR2134547A1 (enrdf_load_stackoverflow) 1972-12-08
DE2120505A1 (enrdf_load_stackoverflow) 1972-11-23

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee