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JPS5513255A - Preparation of terephthalic acid - Google Patents

Preparation of terephthalic acid

Info

Publication number
JPS5513255A
JPS5513255A JP8689078A JP8689078A JPS5513255A JP S5513255 A JPS5513255 A JP S5513255A JP 8689078 A JP8689078 A JP 8689078A JP 8689078 A JP8689078 A JP 8689078A JP S5513255 A JPS5513255 A JP S5513255A
Authority
JP
Japan
Prior art keywords
terephthalic acid
oxidized
solvent
tolualdehyde
containing gas
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
JP8689078A
Other languages
Japanese (ja)
Other versions
JPS5751818B2 (en
Inventor
Makoto Komatsu
Toru Tanaka
Ryoichi Oda
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 JP8689078A priority Critical patent/JPS5513255A/en
Publication of JPS5513255A publication Critical patent/JPS5513255A/en
Publication of JPS5751818B2 publication Critical patent/JPS5751818B2/ja
Granted 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)

Abstract

PURPOSE: To obtain terephthalic acid (T) in high yield according to an industrially practicable continuous process, by oxidizing a reaction mother liquor after separation of crude T prepared through high-temperature oxidation of p-tolualdehyde in the presence of Br-, at a high temperature, and by reusing the oxidized liquor.
CONSTITUTION: p-Tolualdehyde is oxidized with an O2-containing gas in water solvent in the presence of Br- at 180W280°C to give terephthalic acid (T). The amount of Br- is 0.5W12 wt.% based on the solvent, and 2 times or more, preferably 3W6 times that of the starting material. T is then separated by centrifugation, and the reaction mother liquor is oxidized with an O2-containing gas at 280W 370°C to remore very small amounts of inhibitory substances and reused as a reaction solvent containing the catalyst.
COPYRIGHT: (C)1980,JPO&Japio
JP8689078A 1978-07-17 1978-07-17 Preparation of terephthalic acid Granted JPS5513255A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8689078A JPS5513255A (en) 1978-07-17 1978-07-17 Preparation of terephthalic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8689078A JPS5513255A (en) 1978-07-17 1978-07-17 Preparation of terephthalic acid

Publications (2)

Publication Number Publication Date
JPS5513255A true JPS5513255A (en) 1980-01-30
JPS5751818B2 JPS5751818B2 (en) 1982-11-04

Family

ID=13899423

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8689078A Granted JPS5513255A (en) 1978-07-17 1978-07-17 Preparation of terephthalic acid

Country Status (1)

Country Link
JP (1) JPS5513255A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4892970A (en) * 1985-12-30 1990-01-09 Amoco Corporation Staged aromatics oxidation in aqueous systems

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52101687A (en) * 1976-02-23 1977-08-25 Kuraray Yuka Kk Recovery of catalyst

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52101687A (en) * 1976-02-23 1977-08-25 Kuraray Yuka Kk Recovery of catalyst

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4892970A (en) * 1985-12-30 1990-01-09 Amoco Corporation Staged aromatics oxidation in aqueous systems

Also Published As

Publication number Publication date
JPS5751818B2 (en) 1982-11-04

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