JPS55154966A - Preparation of pyromellitic anhydride - Google Patents

Preparation of pyromellitic anhydride

Info

Publication number
JPS55154966A
JPS55154966A JP6157179A JP6157179A JPS55154966A JP S55154966 A JPS55154966 A JP S55154966A JP 6157179 A JP6157179 A JP 6157179A JP 6157179 A JP6157179 A JP 6157179A JP S55154966 A JPS55154966 A JP S55154966A
Authority
JP
Japan
Prior art keywords
alkyl
oxygen
compound
gas
raw material
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.)
Granted
Application number
JP6157179A
Other languages
Japanese (ja)
Other versions
JPS6353194B2 (en
Inventor
Masao Hashimoto
Fujio Matsuda
Yasuo Kogure
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 JP6157179A priority Critical patent/JPS55154966A/en
Publication of JPS55154966A publication Critical patent/JPS55154966A/en
Publication of JPS6353194B2 publication Critical patent/JPS6353194B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Catalysts (AREA)

Abstract

PURPOSE: To prepare the title compound useful as an intermediate of a heat-resistant resin, from an easily available raw material, directly, in one step, and in high yield, by the gas phase oxidation of pentaalkylphenol, 2,3,5,6-tetraalkylphenol, etc.
CONSTITUTION: The title compound is prepared by contacting a compound of formula (R1,4 are H or alkyl; R2,3,5,6 are alkyl; wherein alkyl means 1W4C alkyl, halogenated alkyl, hydroxyalkyl, and acetyl) with oxygen or oxygen-containing gas in the presence of a gas-phase oxidation catalyst, pref. vanadium oxide which may be incorporated with a compound of phosphorus or lithium, etc. The contact may be carried out by a fixed bed or a fluidized bed. The molar ratio of the raw material to oxygen is 1 to 100W10,000, and the reaction temperature is 300W650°C.
COPYRIGHT: (C)1980,JPO&Japio
JP6157179A 1979-05-21 1979-05-21 Preparation of pyromellitic anhydride Granted JPS55154966A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6157179A JPS55154966A (en) 1979-05-21 1979-05-21 Preparation of pyromellitic anhydride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6157179A JPS55154966A (en) 1979-05-21 1979-05-21 Preparation of pyromellitic anhydride

Publications (2)

Publication Number Publication Date
JPS55154966A true JPS55154966A (en) 1980-12-02
JPS6353194B2 JPS6353194B2 (en) 1988-10-21

Family

ID=13174936

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6157179A Granted JPS55154966A (en) 1979-05-21 1979-05-21 Preparation of pyromellitic anhydride

Country Status (1)

Country Link
JP (1) JPS55154966A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6424491U (en) * 1987-08-03 1989-02-09

Also Published As

Publication number Publication date
JPS6353194B2 (en) 1988-10-21

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