GB1348091A - Method for preparing trimellitic anhydride - Google Patents

Method for preparing trimellitic anhydride

Info

Publication number
GB1348091A
GB1348091A GB156872A GB156872A GB1348091A GB 1348091 A GB1348091 A GB 1348091A GB 156872 A GB156872 A GB 156872A GB 156872 A GB156872 A GB 156872A GB 1348091 A GB1348091 A GB 1348091A
Authority
GB
United Kingdom
Prior art keywords
pseudocumene
trimellitic acid
trimellitic
jan
benzene
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
GB156872A
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.)
Instytut Chemii Przemyslowej
Original Assignee
Instytut Chemii Przemyslowej
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 Instytut Chemii Przemyslowej filed Critical Instytut Chemii Przemyslowej
Publication of GB1348091A publication Critical patent/GB1348091A/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)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Furan Compounds (AREA)

Abstract

1348091 Trimellitic acid and anhydride INSTYTUT CHEMII PRZEMYSLOWEJ 13 Jan 1972 [19 Jan 1971] 1568/72 Heading C2C Trimellitic anhydride is prepared by thermal dehydration of trimellitic acid in an organic liquid medium (e.g. benzene or pseudocumene) under an inert gas, the trimellitic acid having been prepared by oxidizing pseudocumene with O 2 in acetic acid medium in the presence of a heavy metal salt catalyst and in the presence of an oxidation initiator comprising incompletely oxidized pseudocumene. The oxidation reaction product is preferably distilled to remove water and at least some acetic acid, a solvent (e.g. benzene or pseudocumene) added to the distillation residue and trimellitic acid crystallized therefrom. The filtrate containing incompletely oxidized pseudocumene may be recycled to the oxidation reactor.
GB156872A 1971-01-19 1972-01-13 Method for preparing trimellitic anhydride Expired GB1348091A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL14570471A PL72985B2 (en) 1971-01-19 1971-01-19

Publications (1)

Publication Number Publication Date
GB1348091A true GB1348091A (en) 1974-03-13

Family

ID=19953236

Family Applications (1)

Application Number Title Priority Date Filing Date
GB156872A Expired GB1348091A (en) 1971-01-19 1972-01-13 Method for preparing trimellitic anhydride

Country Status (7)

Country Link
JP (1) JPS5320020B1 (en)
DE (1) DE2202483B2 (en)
FR (1) FR2122514B1 (en)
GB (1) GB1348091A (en)
IT (1) IT968033B (en)
NL (1) NL7200646A (en)
PL (1) PL72985B2 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE573049A (en) *

Also Published As

Publication number Publication date
DE2202483B2 (en) 1977-03-31
NL7200646A (en) 1972-07-21
FR2122514B1 (en) 1974-12-13
PL72985B2 (en) 1974-08-31
JPS5320020B1 (en) 1978-06-24
IT968033B (en) 1974-03-20
FR2122514A1 (en) 1972-09-01
DE2202483A1 (en) 1972-08-03

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Legal Events

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