GB1319021A - Process for preparing methylterephthalic and methylisophthalic acids - Google Patents

Process for preparing methylterephthalic and methylisophthalic acids

Info

Publication number
GB1319021A
GB1319021A GB1254571A GB1254571A GB1319021A GB 1319021 A GB1319021 A GB 1319021A GB 1254571 A GB1254571 A GB 1254571A GB 1254571 A GB1254571 A GB 1254571A GB 1319021 A GB1319021 A GB 1319021A
Authority
GB
United Kingdom
Prior art keywords
cobalt
compound
manganese
bromine
weight
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
GB1254571A
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.)
Teijin Ltd
Original Assignee
Teijin Ltd
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 Teijin Ltd filed Critical Teijin Ltd
Publication of GB1319021A publication Critical patent/GB1319021A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • B01J31/04—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing carboxylic acids or their salts
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2231/00—Catalytic reactions performed with catalysts classified in B01J31/00
    • B01J2231/70—Oxidation reactions, e.g. epoxidation, (di)hydroxylation, dehydrogenation and analogues
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/70—Complexes comprising metals of Group VII (VIIB) as the central metal
    • B01J2531/72—Manganese
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00—Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/80—Complexes comprising metals of Group VIII as the central metal
    • B01J2531/84—Metals of the iron group
    • B01J2531/845—Cobalt
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1319021 Methyl-tere- and iso-phthalic acids TEIJIN Ltd 30 April 1971 [1 May 1970] 12545/71 Heading C2C A process for preparing methyl terephthalic acid and 4-methyl-isophthalic acid comprises oxidizing pseudocumene in 3 to 25 parts by weight per part by weight of pseudocumene, of acetic acid as solvent, with molecular oxygen under an oxygen partial pressure of not less than 0À2 atmosphere at a reaction temperature (T‹ C.) of 100 to 220‹C. in the presence of a catalyst comprising a cobalt compound, bromine or a bromine compound and optionally a manganese compound, the atomic ratio of manganese in the manganese compound (if present) to cobalt in the cobalt compound being not more than 4 : 1, the manganese in the manganese compound having the same valency as the cobalt in the cobalt compound and the cobalt, bromine and manganese compounds being all soluble in acetic acid under the oxidation conditions, the amount of catalyst being defined by the following equations wherein A is the ratio of the weight of cobalt in the cobalt compound, or the total weight of the cobalt in the cobalt compound and the manganese in the manganese compound, to the total weight of the pseudocumene and the acetic acid and B is the ratio of the gram-atoms of bromine or bromine in the bromine compound to the gram-atoms of the cobalt in the cobalt compound or the combined gram-atoms of the cobalt in the cobalt compound and the manganese in the manganese compound. Examples are furnished.
GB1254571A 1970-05-01 1971-04-30 Process for preparing methylterephthalic and methylisophthalic acids Expired GB1319021A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45037252A JPS4919274B1 (en) 1970-05-01 1970-05-01

Publications (1)

Publication Number Publication Date
GB1319021A true GB1319021A (en) 1973-05-31

Family

ID=12492435

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1254571A Expired GB1319021A (en) 1970-05-01 1971-04-30 Process for preparing methylterephthalic and methylisophthalic acids

Country Status (7)

Country Link
JP (1) JPS4919274B1 (en)
BE (1) BE766553A (en)
CA (1) CA945997A (en)
DE (1) DE2121781A1 (en)
FR (1) FR2091099A5 (en)
GB (1) GB1319021A (en)
NL (1) NL7105904A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5336066U (en) * 1976-09-02 1978-03-30

Also Published As

Publication number Publication date
JPS4919274B1 (en) 1974-05-16
CA945997A (en) 1974-04-23
FR2091099A5 (en) 1972-01-14
NL7105904A (en) 1971-11-03
BE766553A (en) 1971-09-16
DE2121781A1 (en) 1971-12-16

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees