JPS56120637A - Preparation of high-purity terephthalic acid - Google Patents

Preparation of high-purity terephthalic acid

Info

Publication number
JPS56120637A
JPS56120637A JP1659481A JP1659481A JPS56120637A JP S56120637 A JPS56120637 A JP S56120637A JP 1659481 A JP1659481 A JP 1659481A JP 1659481 A JP1659481 A JP 1659481A JP S56120637 A JPS56120637 A JP S56120637A
Authority
JP
Japan
Prior art keywords
ions
equivalent
maintained
terephthalic acid
bromine compound
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
JP1659481A
Other languages
Japanese (ja)
Other versions
JPS582221B2 (en
Inventor
Makoto Komatsu
Toru Tanaka
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.)
Mitsubishi Gas Chemical Co Inc
Original Assignee
Mitsubishi Gas Chemical Co 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 Mitsubishi Gas Chemical Co Inc filed Critical Mitsubishi Gas Chemical Co Inc
Priority to JP56016594A priority Critical patent/JPS582221B2/en
Publication of JPS56120637A publication Critical patent/JPS56120637A/en
Publication of JPS582221B2 publication Critical patent/JPS582221B2/en
Expired 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

Abstract

PURPOSE: To obtain high-purity terephthalic acid for direct polymerization, by the oxidation of p-tolualdehyde with molecular oxygen, in the presence of water and Mn, Ce, a bromine compound and a mineral acid in a specific proportional as a catalyst.
CONSTITUTION: p-Tolualdehyde is oxidized with molecular oxygen in the presence of water as a solvent, heavy metallic catalysts and a bromine compound. As the heavy metallic catalysts, Mn and Ce are used and the bromine compound is maintained at 0.5W12wt% based on the reaction solution as bromide ions, and the g- equivalent of the hydrogen ions of the mineral acid is maintained at 1W85% based on the total g-equivalent of hydrogen, Mn and Ce ions, and the total g-equivalent of hydrogen ions, Mn and Ce is maintained at 0.5W5 times that of g-equivalent of bormine ions.
COPYRIGHT: (C)1981,JPO&Japio
JP56016594A 1981-02-06 1981-02-06 Production method of high purity terephthalic acid Expired JPS582221B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56016594A JPS582221B2 (en) 1981-02-06 1981-02-06 Production method of high purity terephthalic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56016594A JPS582221B2 (en) 1981-02-06 1981-02-06 Production method of high purity terephthalic acid

Publications (2)

Publication Number Publication Date
JPS56120637A true JPS56120637A (en) 1981-09-22
JPS582221B2 JPS582221B2 (en) 1983-01-14

Family

ID=11920601

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56016594A Expired JPS582221B2 (en) 1981-02-06 1981-02-06 Production method of high purity terephthalic acid

Country Status (1)

Country Link
JP (1) JPS582221B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5490132A (en) * 1977-12-07 1979-07-17 Mitsubishi Gas Chem Co Inc Preparation of high purity terephthalic acid

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5490132A (en) * 1977-12-07 1979-07-17 Mitsubishi Gas Chem Co Inc Preparation of high purity terephthalic acid

Also Published As

Publication number Publication date
JPS582221B2 (en) 1983-01-14

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