GB1312279A - Method of preparation of monoanhydrides of acids that are at least tetracarboxylic - Google Patents

Method of preparation of monoanhydrides of acids that are at least tetracarboxylic

Info

Publication number
GB1312279A
GB1312279A GB5490170A GB5490170A GB1312279A GB 1312279 A GB1312279 A GB 1312279A GB 5490170 A GB5490170 A GB 5490170A GB 5490170 A GB5490170 A GB 5490170A GB 1312279 A GB1312279 A GB 1312279A
Authority
GB
United Kingdom
Prior art keywords
acid
tetracarboxylic
mono
acids
monoanhydrides
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
GB5490170A
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.)
Orkem SA
Original Assignee
Chimique des Charbonnages 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 Chimique des Charbonnages SA filed Critical Chimique des Charbonnages SA
Publication of GB1312279A publication Critical patent/GB1312279A/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)
  • Furan Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1312279 Polycarboxylic acid monoanhydrides SOC CHIMIQUE DES CHARBONNAGES 18 Nov 1970 [19 Nov 1969] 54901/70 Heading C2C Mono-anhydrides of acids that are at least tetracarboxylic are prepared by heating the acid in the temperature range wherein only the monoanhydride is formed, the temperature range being determined by thermo-gravimetric study. The acid may be heated in powder form or a solution of the acid in water may be heated in the presence of a solvent which forms an azeotrope with water and which may be either a good or a poor solvent for the resulting monoanhydride. In the examples, cyclopentane- 1,2,3,4-tetracarboxylic acid is dehydrated to the 1,2-mono-anhydride and meso-butane-1,2, 3,4-tetracarboxylic acid is dehydrated to the novel 2,3-mono-anhydride which is characterized by its dimethyl ester.
GB5490170A 1969-11-19 1970-11-18 Method of preparation of monoanhydrides of acids that are at least tetracarboxylic Expired GB1312279A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6939821A FR2067871A5 (en) 1969-11-19 1969-11-19

Publications (1)

Publication Number Publication Date
GB1312279A true GB1312279A (en) 1973-04-04

Family

ID=9043317

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5490170A Expired GB1312279A (en) 1969-11-19 1970-11-18 Method of preparation of monoanhydrides of acids that are at least tetracarboxylic

Country Status (8)

Country Link
BE (1) BE758447A (en)
CH (1) CH521936A (en)
DE (1) DE2056937A1 (en)
ES (1) ES385694A1 (en)
FR (1) FR2067871A5 (en)
GB (1) GB1312279A (en)
LU (1) LU62016A1 (en)
NL (1) NL7016835A (en)

Also Published As

Publication number Publication date
FR2067871A5 (en) 1971-08-20
NL7016835A (en) 1971-05-24
BE758447A (en) 1971-05-04
ES385694A1 (en) 1973-04-01
LU62016A1 (en) 1971-08-09
DE2056937A1 (en) 1971-05-27
CH521936A (en) 1972-04-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee