JPS57188543A - Preparation of terephthalic acid - Google Patents

Preparation of terephthalic acid

Info

Publication number
JPS57188543A
JPS57188543A JP56071565A JP7156581A JPS57188543A JP S57188543 A JPS57188543 A JP S57188543A JP 56071565 A JP56071565 A JP 56071565A JP 7156581 A JP7156581 A JP 7156581A JP S57188543 A JPS57188543 A JP S57188543A
Authority
JP
Japan
Prior art keywords
additional oxidation
terephthalic acid
temperature
xylene
carrying
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
JP56071565A
Other languages
Japanese (ja)
Other versions
JPH0257528B2 (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 JP56071565A priority Critical patent/JPS57188543A/en
Publication of JPS57188543A publication Critical patent/JPS57188543A/en
Publication of JPH0257528B2 publication Critical patent/JPH0257528B2/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 the acetic acid solvent in the preparation of high purity terephthalic acid in one plant, by catalytically oxidizing p-xylene under specific conditions, carrying out the additional oxidation at low temperature, raising the pressure, and carrying out the additional oxidation in the course of temperature increase before the high temperature additional oxidation.
CONSTITUTION: The reaction of p-xylene with molecular oxygen in acetic acid solvent in the presence of a catalyst containing heavy metal and bromine, is carried out as follows. (i) ≥95wt% of the p-xylene is oxidized (1) to terephthalic acid at 180W230°C. (ii) The oxidation mixture is subjected to the additional oxidation (2) at a temperature lower than the above temperature by 0W50°C. (iii) The pressure of the system is increased (3), and heated (4) at ≥235°C while carrying out the additional oxidation with 0.003mol, besed on 1mol of the terephthalic acid, of molecular oxygen. (iv) Additional oxidation is further carried out (5) at ≥235°C under the above condition of the amount of molecular oxygen. (v)The product is crystallized (6) and filtered (7) to obtain the high purity terephthalic acid which can be directly used as a raw material of a polyester, continuously.
COPYRIGHT: (C)1982,JPO&Japio
JP56071565A 1981-05-13 1981-05-13 Preparation of terephthalic acid Granted JPS57188543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56071565A JPS57188543A (en) 1981-05-13 1981-05-13 Preparation of terephthalic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56071565A JPS57188543A (en) 1981-05-13 1981-05-13 Preparation of terephthalic acid

Publications (2)

Publication Number Publication Date
JPS57188543A true JPS57188543A (en) 1982-11-19
JPH0257528B2 JPH0257528B2 (en) 1990-12-05

Family

ID=13464357

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56071565A Granted JPS57188543A (en) 1981-05-13 1981-05-13 Preparation of terephthalic acid

Country Status (1)

Country Link
JP (1) JPS57188543A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59106435A (en) * 1982-12-10 1984-06-20 Mitsubishi Chem Ind Ltd Production of high-purity terephthalic acid
JPS6038841U (en) * 1983-08-26 1985-03-18 ナイルス部品株式会社 Turn signal restoration device
JPH02134344A (en) * 1988-11-15 1990-05-23 Mitsubishi Kasei Corp Production of terephthalic acid
WO2007103029A1 (en) * 2006-03-01 2007-09-13 Eastman Chemical Company Polycarboxylic acid production system employing enhanced multistage oxidative digestion
US7326807B2 (en) 2006-03-01 2008-02-05 Eastman Chemical Company Polycarboxylic acid production system with enhanced heating for oxidative digestion
US7326808B2 (en) 2006-03-01 2008-02-05 Eastman Chemical Company Polycarboxylic acid production system employing cooled mother liquor from oxidative digestion as feed to impurity purge system
US7393973B2 (en) 2006-03-01 2008-07-01 Eastman Chemical Company Polycarboxylic acid production system with enhanced residence time distribution for oxidative digestion
US7420082B2 (en) 2006-03-01 2008-09-02 Eastman Chemical Company Polycarboxylic acid production system employing hot liquor removal downstream of oxidative digestion
US7501537B2 (en) 2006-03-01 2009-03-10 Eastman Chemical Company Polycarboxylic acid production system employing oxidative digestion with reduced or eliminated upstream liquor exchange
US7829037B2 (en) 2006-03-01 2010-11-09 Eastman Chemical Company Oxidation system with sidedraw secondary reactor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5555138A (en) * 1978-10-19 1980-04-22 Mitsubishi Chem Ind Ltd Preparation of highly pure terephthalic acid

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5555138A (en) * 1978-10-19 1980-04-22 Mitsubishi Chem Ind Ltd Preparation of highly pure terephthalic acid

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59106435A (en) * 1982-12-10 1984-06-20 Mitsubishi Chem Ind Ltd Production of high-purity terephthalic acid
US4772748A (en) * 1982-12-10 1988-09-20 Mitsubishi Chemical Industries Limited Process for producing highly pure terephthalic acid
JPH0451539B2 (en) * 1982-12-10 1992-08-19 Mitsubishi Chem Ind
JPS6038841U (en) * 1983-08-26 1985-03-18 ナイルス部品株式会社 Turn signal restoration device
JPH02134344A (en) * 1988-11-15 1990-05-23 Mitsubishi Kasei Corp Production of terephthalic acid
JP2504545B2 (en) * 1988-11-15 1996-06-05 三菱化学株式会社 Manufacturing method of terephthalic acid
WO2007103029A1 (en) * 2006-03-01 2007-09-13 Eastman Chemical Company Polycarboxylic acid production system employing enhanced multistage oxidative digestion
US7326807B2 (en) 2006-03-01 2008-02-05 Eastman Chemical Company Polycarboxylic acid production system with enhanced heating for oxidative digestion
US7326808B2 (en) 2006-03-01 2008-02-05 Eastman Chemical Company Polycarboxylic acid production system employing cooled mother liquor from oxidative digestion as feed to impurity purge system
US7393973B2 (en) 2006-03-01 2008-07-01 Eastman Chemical Company Polycarboxylic acid production system with enhanced residence time distribution for oxidative digestion
US7420082B2 (en) 2006-03-01 2008-09-02 Eastman Chemical Company Polycarboxylic acid production system employing hot liquor removal downstream of oxidative digestion
US7501537B2 (en) 2006-03-01 2009-03-10 Eastman Chemical Company Polycarboxylic acid production system employing oxidative digestion with reduced or eliminated upstream liquor exchange
US7829037B2 (en) 2006-03-01 2010-11-09 Eastman Chemical Company Oxidation system with sidedraw secondary reactor

Also Published As

Publication number Publication date
JPH0257528B2 (en) 1990-12-05

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