JPS57200328A - Preparation of terephthalic acid - Google Patents

Preparation of terephthalic acid

Info

Publication number
JPS57200328A
JPS57200328A JP56085118A JP8511881A JPS57200328A JP S57200328 A JPS57200328 A JP S57200328A JP 56085118 A JP56085118 A JP 56085118A JP 8511881 A JP8511881 A JP 8511881A JP S57200328 A JPS57200328 A JP S57200328A
Authority
JP
Japan
Prior art keywords
oxidation
terephthalic acid
xylene
post
maintained
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
JP56085118A
Other languages
Japanese (ja)
Other versions
JPH0257529B2 (en
Inventor
Hiroshi Hashizume
Yoshiaki Izumisawa
Haruo Habu
Yasuo Saruwatari
Shigeki Harada
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 Kasei Corp
Original Assignee
Mitsubishi Kasei Corp
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 Kasei Corp filed Critical Mitsubishi Kasei Corp
Priority to JP56085118A priority Critical patent/JPS57200328A/en
Publication of JPS57200328A publication Critical patent/JPS57200328A/en
Publication of JPH0257529B2 publication Critical patent/JPH0257529B2/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)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

PURPOSE: To reduce the combustion loss of acetic acid solvent in the preparation of high purity terephthalic acid by the combination of oxidation, low-temperature post-oxidation, and high-temperature post-oxidation of p-xylene, by using a specific process.
CONSTITUTION: High purity terephthalic acid is prepared continuously by reacting p-xylene with oxygen in acetic acid solvent in the presence of a catalyst containing a heavy metal and bromine. The process is carried out by (1) charging p-xylene and O2 in the first tank reactor maintained at 180W230°C, (2) oxidizing at least 95wt% of p-xylene to terephthalic acid, (3) transferring the oxidation product to the second tank reactor 2 maintained at a temperature lower than the first reactor by 0W50°C to effect the first post-oxidation with O2, (4) raising the pressure of the resultant mixture, (5) heating the mixture at ≥235°C with the tubular heater 4 to effect the second post-oxidation, (6) keeping the resultant mixture in a tank 5 maintained at ≥235°C at least for 5min, and finally (7) crystallizing with the crystallizer 6 and filtering the product to recover the terephthalic acid.
COPYRIGHT: (C)1982,JPO&Japio
JP56085118A 1981-06-03 1981-06-03 Preparation of terephthalic acid Granted JPS57200328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56085118A JPS57200328A (en) 1981-06-03 1981-06-03 Preparation of terephthalic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56085118A JPS57200328A (en) 1981-06-03 1981-06-03 Preparation of terephthalic acid

Publications (2)

Publication Number Publication Date
JPS57200328A true JPS57200328A (en) 1982-12-08
JPH0257529B2 JPH0257529B2 (en) 1990-12-05

Family

ID=13849709

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56085118A Granted JPS57200328A (en) 1981-06-03 1981-06-03 Preparation of terephthalic acid

Country Status (1)

Country Link
JP (1) JPS57200328A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59190947A (en) * 1983-04-11 1984-10-29 Toyobo Co Ltd Production of terephthalic acid of high purity
US4772748A (en) * 1982-12-10 1988-09-20 Mitsubishi Chemical Industries Limited Process for producing highly pure terephthalic acid
FR2710638A1 (en) * 1993-09-28 1995-04-07 Samsung General Chemicals Co Process for the preparation of isomers of benzene dicarboxylic acids of high purity

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6323982A (en) * 1986-07-05 1988-02-01 バスフ・アクチエンゲゼルシャフト Binder for transfer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6323982A (en) * 1986-07-05 1988-02-01 バスフ・アクチエンゲゼルシャフト Binder for transfer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4772748A (en) * 1982-12-10 1988-09-20 Mitsubishi Chemical Industries Limited Process for producing highly pure terephthalic acid
JPS59190947A (en) * 1983-04-11 1984-10-29 Toyobo Co Ltd Production of terephthalic acid of high purity
JPH0559099B2 (en) * 1983-04-11 1993-08-30 Toyo Boseki
FR2710638A1 (en) * 1993-09-28 1995-04-07 Samsung General Chemicals Co Process for the preparation of isomers of benzene dicarboxylic acids of high purity

Also Published As

Publication number Publication date
JPH0257529B2 (en) 1990-12-05

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