JPS5587744A - Recovery of terephthalic acid - Google Patents

Recovery of terephthalic acid

Info

Publication number
JPS5587744A
JPS5587744A JP15927478A JP15927478A JPS5587744A JP S5587744 A JPS5587744 A JP S5587744A JP 15927478 A JP15927478 A JP 15927478A JP 15927478 A JP15927478 A JP 15927478A JP S5587744 A JPS5587744 A JP S5587744A
Authority
JP
Japan
Prior art keywords
terephthalic acid
column
acetic acid
suspension
temperature
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.)
Pending
Application number
JP15927478A
Other languages
Japanese (ja)
Inventor
Masatoshi Tauchi
Hiroshi Takeuchi
Kazuki Saka
Yoshiyuki Asahina
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.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
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 Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP15927478A priority Critical patent/JPS5587744A/en
Priority to DE2906945A priority patent/DE2906945C2/en
Priority to GB7906255A priority patent/GB2014985B/en
Priority to US06/014,216 priority patent/US4201871A/en
Publication of JPS5587744A publication Critical patent/JPS5587744A/en
Pending 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

  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To recover the title compound for direct polymerization in high purity, in a simple operation and high purification effect, by residence of hydrous hot acetic acid suspension of terephthalic acid crystal displacement-washed slowly in a continuous countercurrent contact column, in an agitated vessel for a specific time at a specific temperature.
CONSTITUTION: The suspension containing terephthalic acid, obtained by oxidation of an aromatic compound in the liquid phase with a molecular oxygen-containing gas, is brought into slow continuous countercurrent contact in a column with hydrous acetic acid at a column temperature (T) not lower than the oxidation one by 10°C and the rising speed of the acetic acid between 0.005cm/sec and 5cm/sec, for an average residence time of terephthalic acid crystals between 30 seconds and 10 minutes. The hot acetic acid suspension of terephthalic acid crystals as a downflow from the column is kept in an agitated vessel at a temperature not lower than T in the column by 10°C for 5W80 minutes on an average. This simple operation a permits high purification effect and a recovery of high-purity terephthalic acid.
COPYRIGHT: (C)1980,JPO&Japio
JP15927478A 1978-02-23 1978-12-26 Recovery of terephthalic acid Pending JPS5587744A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP15927478A JPS5587744A (en) 1978-12-26 1978-12-26 Recovery of terephthalic acid
DE2906945A DE2906945C2 (en) 1978-02-23 1979-02-22 Process for obtaining high-purity terephthalic acid
GB7906255A GB2014985B (en) 1978-02-23 1979-02-22 Purification of terephthalic acid
US06/014,216 US4201871A (en) 1978-02-23 1979-02-22 Process for recovering terephthalic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15927478A JPS5587744A (en) 1978-12-26 1978-12-26 Recovery of terephthalic acid

Publications (1)

Publication Number Publication Date
JPS5587744A true JPS5587744A (en) 1980-07-02

Family

ID=15690190

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15927478A Pending JPS5587744A (en) 1978-02-23 1978-12-26 Recovery of terephthalic acid

Country Status (1)

Country Link
JP (1) JPS5587744A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0719576A1 (en) 1994-12-26 1996-07-03 Mitsubishi Gas Chemical Company, Inc. Process for producing highly pure terephthalic acid
EP0822176A3 (en) * 1996-07-29 1998-11-04 Mitsubishi Gas Chemical Company, Inc. Process for producing highly pure terephthalic acid by use of dispersion medium replacement apparatus
JP2007517896A (en) * 2004-01-15 2007-07-05 イーストマン ケミカル カンパニー Process for producing a dry carboxylic acid cake suitable for use in polyester production
KR20180033124A (en) 2015-07-22 2018-04-02 미쯔비시 가스 케미칼 컴파니, 인코포레이티드 Method for producing high purity terephthalic acid
KR20180132656A (en) 2016-03-31 2018-12-12 미쯔비시 가스 케미칼 컴파니, 인코포레이티드 Method for producing terephthalic acid
KR20190046866A (en) 2016-09-14 2019-05-07 미쯔비시 가스 케미칼 컴파니, 인코포레이티드 Method for producing high purity terephthalic acid

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0719576A1 (en) 1994-12-26 1996-07-03 Mitsubishi Gas Chemical Company, Inc. Process for producing highly pure terephthalic acid
EP0822176A3 (en) * 1996-07-29 1998-11-04 Mitsubishi Gas Chemical Company, Inc. Process for producing highly pure terephthalic acid by use of dispersion medium replacement apparatus
JP2007517896A (en) * 2004-01-15 2007-07-05 イーストマン ケミカル カンパニー Process for producing a dry carboxylic acid cake suitable for use in polyester production
KR20180033124A (en) 2015-07-22 2018-04-02 미쯔비시 가스 케미칼 컴파니, 인코포레이티드 Method for producing high purity terephthalic acid
US10273197B2 (en) 2015-07-22 2019-04-30 Mitsubishi Gas Chemical Company, Inc. Method for producing high-purity terephthalic acid
KR20180132656A (en) 2016-03-31 2018-12-12 미쯔비시 가스 케미칼 컴파니, 인코포레이티드 Method for producing terephthalic acid
US10385001B2 (en) 2016-03-31 2019-08-20 Mitsubishi Gas Chemical Company, Inc. Method of producing terephthalic acid
KR20190046866A (en) 2016-09-14 2019-05-07 미쯔비시 가스 케미칼 컴파니, 인코포레이티드 Method for producing high purity terephthalic acid
US10683253B2 (en) 2016-09-14 2020-06-16 Mitsubishi Gas Chemical Company, Inc. Method for producing high-purity terephthalic acid

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