GB1237786A - Process for the production of phthalic acids - Google Patents

Process for the production of phthalic acids

Info

Publication number
GB1237786A
GB1237786A GB5301868A GB5301868A GB1237786A GB 1237786 A GB1237786 A GB 1237786A GB 5301868 A GB5301868 A GB 5301868A GB 5301868 A GB5301868 A GB 5301868A GB 1237786 A GB1237786 A GB 1237786A
Authority
GB
United Kingdom
Prior art keywords
oxygen
nov
mixture
acids
dialkylbenzene
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
GB5301868A
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.)
Huels AG
Original Assignee
Chemische Werke Huels 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 Chemische Werke Huels AG filed Critical Chemische Werke Huels AG
Publication of GB1237786A publication Critical patent/GB1237786A/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
    • C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
    • C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
    • C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups

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)

Abstract

1,237,786. Phthalic acids. CHEMISCHE WERKE HULS A.G. 8 Nov., 1968 [11 Nov., 1967], No. 53018/68. Heading C2C. A phthalic acid is obtained by catalytic oxidation with molecular oxygen of the corresponding dialkylbenzene or a dialkylbenzene carrying substituents in the alkyl groups in an aliphatic carboxylic acid having up to 8 carbon atoms or a mixture of such acids using a heavy metal/ bromine catalyst, the process having the following features:- (a) The oxygen is used in excess so that the offgas throughout the oxidation contains oxygen; (b) The catalyst is cobalt bromide or a mixture of a bromine compound and a soluble cobalt compound; and (c) The concentration of intermediate oxidation products formed during the reaction is kept below 30 gm./litre of reaction solution.
GB5301868A 1967-11-11 1968-11-08 Process for the production of phthalic acids Expired GB1237786A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1643827 1967-11-11

Publications (1)

Publication Number Publication Date
GB1237786A true GB1237786A (en) 1971-06-30

Family

ID=5684407

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5301868A Expired GB1237786A (en) 1967-11-11 1968-11-08 Process for the production of phthalic acids

Country Status (2)

Country Link
FR (1) FR1590270A (en)
GB (1) GB1237786A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974214A (en) * 1974-02-27 1976-08-10 Atlantic Richfield Company Isophthalic acid manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974214A (en) * 1974-02-27 1976-08-10 Atlantic Richfield Company Isophthalic acid manufacture

Also Published As

Publication number Publication date
FR1590270A (en) 1970-04-13

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