JPS57167942A - Continuous preparation of trimellitic acid - Google Patents

Continuous preparation of trimellitic acid

Info

Publication number
JPS57167942A
JPS57167942A JP56052444A JP5244481A JPS57167942A JP S57167942 A JPS57167942 A JP S57167942A JP 56052444 A JP56052444 A JP 56052444A JP 5244481 A JP5244481 A JP 5244481A JP S57167942 A JPS57167942 A JP S57167942A
Authority
JP
Japan
Prior art keywords
concentration
compound
pseudocumene
catalyst
stage
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.)
Pending
Application number
JP56052444A
Other languages
Japanese (ja)
Inventor
Masaaki Suematsu
Kenji Nakaoka
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.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
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 Toray Industries Inc filed Critical Toray Industries Inc
Priority to JP56052444A priority Critical patent/JPS57167942A/en
Publication of JPS57167942A publication Critical patent/JPS57167942A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

PURPOSE: To prepare the titled compound, in high purity and yield, by the two- stage continuous oxidation reaction of pseudocumene at a specific temperature using a catalyst comprising Co, Mn and Br at a specific concentration, keeping the concentration of the raw material in the produced liquid at the first stage below a specific level.
CONSTITUTION: Trimellitic acid is prepared by the continuous oxidation of pseudocumene with an O2-containing gas in an acetic acid solvent in the presence of a catalyst composed mainly of a Co compound, an Mn compound and a bromine compound. In the above process, the first stage reaction is carried out at 120W180°C keeping the amount of Co to 0.01W0.09wt% of the acetic acid solvent, that of Mn to 1W50wt% of Co, and that of Br atom to 6W20 times the weight of Co, and reducing the concentration of the residual pseudocumene in the produced liquid to ≤0.4wt%. After adjusting the concentration of Mn to 15W50wt% of Co, the second oxidation reaction is carried out at 180W230°C. The deactivation of the catalyst can be effectively prevented.
COPYRIGHT: (C)1982,JPO&Japio
JP56052444A 1981-04-09 1981-04-09 Continuous preparation of trimellitic acid Pending JPS57167942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56052444A JPS57167942A (en) 1981-04-09 1981-04-09 Continuous preparation of trimellitic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56052444A JPS57167942A (en) 1981-04-09 1981-04-09 Continuous preparation of trimellitic acid

Publications (1)

Publication Number Publication Date
JPS57167942A true JPS57167942A (en) 1982-10-16

Family

ID=12914898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56052444A Pending JPS57167942A (en) 1981-04-09 1981-04-09 Continuous preparation of trimellitic acid

Country Status (1)

Country Link
JP (1) JPS57167942A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61280448A (en) * 1985-05-30 1986-12-11 アモコ・コ−ポレ−シヨン Manufacture of trimellitic acid anhydride and pyromellitic acid dianhydride
US5171881A (en) * 1990-04-03 1992-12-15 Yukong Limited Process for producing trimellitic acid
JP2005145954A (en) * 2003-10-20 2005-06-09 Mitsubishi Gas Chem Co Inc Preparation method of pyromellitic acid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61280448A (en) * 1985-05-30 1986-12-11 アモコ・コ−ポレ−シヨン Manufacture of trimellitic acid anhydride and pyromellitic acid dianhydride
US5171881A (en) * 1990-04-03 1992-12-15 Yukong Limited Process for producing trimellitic acid
JP2005145954A (en) * 2003-10-20 2005-06-09 Mitsubishi Gas Chem Co Inc Preparation method of pyromellitic acid
JP4734877B2 (en) * 2003-10-20 2011-07-27 三菱瓦斯化学株式会社 Method for producing pyromellitic acid

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