JPS5463039A - Preparation of pyromellitic acid and/or pyromellitic anhydride - Google Patents

Preparation of pyromellitic acid and/or pyromellitic anhydride

Info

Publication number
JPS5463039A
JPS5463039A JP12958977A JP12958977A JPS5463039A JP S5463039 A JPS5463039 A JP S5463039A JP 12958977 A JP12958977 A JP 12958977A JP 12958977 A JP12958977 A JP 12958977A JP S5463039 A JPS5463039 A JP S5463039A
Authority
JP
Japan
Prior art keywords
pyromellitic
acid
anhydride
mixture
carboxylic acid
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
JP12958977A
Other languages
Japanese (ja)
Other versions
JPS6115864B2 (en
Inventor
Motoo Kawamata
Shiro Fujikake
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 JP12958977A priority Critical patent/JPS5463039A/en
Publication of JPS5463039A publication Critical patent/JPS5463039A/en
Publication of JPS6115864B2 publication Critical patent/JPS6115864B2/ja
Granted legal-status Critical Current

Links

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  • Furan Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To prepare the high purity title compound selectively and in high yield by dissolving an aromatic poly-valent carboxylic acid mixture containing pyromellitic acid in a specific medium, and adding benzene and/or an alkylbenzene to the solution, thereby precipitating the title compound.
CONSTITUTION: A mixture of aromatic poly-valent carboxylic acid and/or its anhydride containing pyromellitic acid and/or pyromellitic anhydride dissolved in a≥3C aliphatic carboxylic acid (e.g. acetic acid) and/or its anhydride. Then, benzene and/or alkylbenzene is added to this mixture to precipitate the objective compound selectively. Pyromellitic acid or pyromellitic anhydride can also be obtained from a mixture of aromatic poly-valent carboxylic acid containing a comparatively small amount of the compound, such as the distillation residue of anhydrous phtaoic acid obtained by the air oxidation of e.g. o-xylene.
USE: Starting material of heat-resistant resins, etc.
COPYRIGHT: (C)1979,JPO&Japio
JP12958977A 1977-10-31 1977-10-31 Preparation of pyromellitic acid and/or pyromellitic anhydride Granted JPS5463039A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12958977A JPS5463039A (en) 1977-10-31 1977-10-31 Preparation of pyromellitic acid and/or pyromellitic anhydride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12958977A JPS5463039A (en) 1977-10-31 1977-10-31 Preparation of pyromellitic acid and/or pyromellitic anhydride

Publications (2)

Publication Number Publication Date
JPS5463039A true JPS5463039A (en) 1979-05-21
JPS6115864B2 JPS6115864B2 (en) 1986-04-26

Family

ID=15013171

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12958977A Granted JPS5463039A (en) 1977-10-31 1977-10-31 Preparation of pyromellitic acid and/or pyromellitic anhydride

Country Status (1)

Country Link
JP (1) JPS5463039A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004111026A1 (en) * 2003-06-17 2004-12-23 Nippon Shokubai Co., Ltd. Bis (fluorine-containing phthalic anhydride) and method for production thereof
JP2005029572A (en) * 2003-06-17 2005-02-03 Nippon Shokubai Co Ltd Bis(fluorine-containing phthalic anhydride) and method for production thereof
JP2010168395A (en) * 2003-06-17 2010-08-05 Nippon Shokubai Co Ltd Intermediate raw material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004111026A1 (en) * 2003-06-17 2004-12-23 Nippon Shokubai Co., Ltd. Bis (fluorine-containing phthalic anhydride) and method for production thereof
JP2005029572A (en) * 2003-06-17 2005-02-03 Nippon Shokubai Co Ltd Bis(fluorine-containing phthalic anhydride) and method for production thereof
US7700647B2 (en) 2003-06-17 2010-04-20 Nippon Shokubai Co., Ltd. Fluorinated bis (phthalic anhydride) and method for producing the same
JP2010168395A (en) * 2003-06-17 2010-08-05 Nippon Shokubai Co Ltd Intermediate raw material

Also Published As

Publication number Publication date
JPS6115864B2 (en) 1986-04-26

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