JPS55122787A - Preparation of pyromellitic anhydride - Google Patents

Preparation of pyromellitic anhydride

Info

Publication number
JPS55122787A
JPS55122787A JP2861579A JP2861579A JPS55122787A JP S55122787 A JPS55122787 A JP S55122787A JP 2861579 A JP2861579 A JP 2861579A JP 2861579 A JP2861579 A JP 2861579A JP S55122787 A JPS55122787 A JP S55122787A
Authority
JP
Japan
Prior art keywords
pyromellitic anhydride
vapor
oxygen
containing gas
oxidation catalyst
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
JP2861579A
Other languages
Japanese (ja)
Inventor
Masao Hashimoto
Fujio Matsuda
Toshihiro Toyoda
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.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals 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 Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP2861579A priority Critical patent/JPS55122787A/en
Publication of JPS55122787A publication Critical patent/JPS55122787A/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

  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

PURPOSE: To prepare the title compound useful as an intermediate of heat-resistant resins, by contacting a pentaalkylbenzene, a hexa-alkylbenzene, and/or their derivatives, with oxygen-containing gas in the presence of a vapor-phase oxidation catalyst.
CONSTITUTION: One or more compounds selected from the compounds of formulae I and II (R1W6 are 1W4C alkyl, halogenated alkyl, hydroxyalkyl, alkoxyalkyl, formylalkyl, caroxyalkyl, acetonyl, or acetyl) are brought into contact with an oxygen- containing gas (e.g. air) in the presence of a vapor-phase oxidation catalyst (e.g. vanadium oxide), to obtain pyromellitic anhydride. The molar ratio of the polyalkylbenzene to O2 is pref. 1 to 100W10,000, and the reaction temperature is 300W 650°C.
EFFECT: The objective compound can be prepared in high yield, by the direct, one- step reaction.
COPYRIGHT: (C)1980,JPO&Japio
JP2861579A 1979-03-14 1979-03-14 Preparation of pyromellitic anhydride Pending JPS55122787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2861579A JPS55122787A (en) 1979-03-14 1979-03-14 Preparation of pyromellitic anhydride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2861579A JPS55122787A (en) 1979-03-14 1979-03-14 Preparation of pyromellitic anhydride

Publications (1)

Publication Number Publication Date
JPS55122787A true JPS55122787A (en) 1980-09-20

Family

ID=12253454

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2861579A Pending JPS55122787A (en) 1979-03-14 1979-03-14 Preparation of pyromellitic anhydride

Country Status (1)

Country Link
JP (1) JPS55122787A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0612748A1 (en) * 1993-02-25 1994-08-31 Consortium für elektrochemische Industrie GmbH Process for the preparation of pyromellitic dianhydride (PMDA)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4930821A (en) * 1972-07-04 1974-03-19

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4930821A (en) * 1972-07-04 1974-03-19

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0612748A1 (en) * 1993-02-25 1994-08-31 Consortium für elektrochemische Industrie GmbH Process for the preparation of pyromellitic dianhydride (PMDA)

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