JPS5488234A - Purification of terephthalic acid - Google Patents

Purification of terephthalic acid

Info

Publication number
JPS5488234A
JPS5488234A JP15493077A JP15493077A JPS5488234A JP S5488234 A JPS5488234 A JP S5488234A JP 15493077 A JP15493077 A JP 15493077A JP 15493077 A JP15493077 A JP 15493077A JP S5488234 A JPS5488234 A JP S5488234A
Authority
JP
Japan
Prior art keywords
terephthalic acid
water
catalyst
alkali substance
tolualdehyde
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
JP15493077A
Other languages
Japanese (ja)
Other versions
JPS5751374B2 (en
Inventor
Makoto Komatsu
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 JP15493077A priority Critical patent/JPS5488234A/en
Publication of JPS5488234A publication Critical patent/JPS5488234A/en
Publication of JPS5751374B2 publication Critical patent/JPS5751374B2/ja
Granted legal-status Critical Current

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To obtain high-purity terephthalic acid easily, by adding an alkali substance to an aqueous solution of crude terephthalic acid, obtained through oxidation of p-tolualdehyde in water in the presence of a bromine compound catalyst with oxygen, followed by hydrogenation and recrystallization.
CONSTITUTION: Crude terephthalic acid, obtained by oxidation of p-tolualdehyde in the liquid phase in the presence of a bromine compound, e.g. HBr, with oxygen in water, is dissolved in water and incorporated with an alkali substance. The mixture is then hydrogenated with H2 in the presence of a catalyst, and recrystallized to give the purified objective compound. Hydroxides and carbonates of Na, K, Ca, etc. may be used as the alkali substance in an amount equivalent to or more than Br contained in the raw material.
EFFECT: Activity lowering of the hydrogenation catalyst can be prevented.
COPYRIGHT: (C)1979,JPO&Japio
JP15493077A 1977-12-22 1977-12-22 Purification of terephthalic acid Granted JPS5488234A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15493077A JPS5488234A (en) 1977-12-22 1977-12-22 Purification of terephthalic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15493077A JPS5488234A (en) 1977-12-22 1977-12-22 Purification of terephthalic acid

Publications (2)

Publication Number Publication Date
JPS5488234A true JPS5488234A (en) 1979-07-13
JPS5751374B2 JPS5751374B2 (en) 1982-11-01

Family

ID=15595043

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15493077A Granted JPS5488234A (en) 1977-12-22 1977-12-22 Purification of terephthalic acid

Country Status (1)

Country Link
JP (1) JPS5488234A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6226246A (en) * 1985-06-17 1987-02-04 アモコ・コ−ポレ−シヨン Purification of terephthalic acid
KR20000041505A (en) * 1998-12-22 2000-07-15 유현식 Method for the preparation of aromatic polycarbonic acid
KR100330085B1 (en) * 1998-12-22 2002-11-22 삼성종합화학주식회사 A process for producing aromatic polycarboxylic acid

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678106A (en) * 1970-04-02 1972-07-18 Fmc Corp OXIDATION OF p-XYLENE AND p-TOLUIC ACID TO TEREPHTHALIC ACID IN AQUEOUS MEDIUM
JPS5145581A (en) * 1974-10-16 1976-04-19 Hitachi Ltd Kankyoyo so2 keikobunsekikei
JPS5159829A (en) * 1974-11-22 1976-05-25 Mitsui Petrochemical Ind KOJUNDOTEREFUTARUSANNOSEIZOHOHO

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678106A (en) * 1970-04-02 1972-07-18 Fmc Corp OXIDATION OF p-XYLENE AND p-TOLUIC ACID TO TEREPHTHALIC ACID IN AQUEOUS MEDIUM
JPS5145581A (en) * 1974-10-16 1976-04-19 Hitachi Ltd Kankyoyo so2 keikobunsekikei
JPS5159829A (en) * 1974-11-22 1976-05-25 Mitsui Petrochemical Ind KOJUNDOTEREFUTARUSANNOSEIZOHOHO

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6226246A (en) * 1985-06-17 1987-02-04 アモコ・コ−ポレ−シヨン Purification of terephthalic acid
KR20000041505A (en) * 1998-12-22 2000-07-15 유현식 Method for the preparation of aromatic polycarbonic acid
KR100330085B1 (en) * 1998-12-22 2002-11-22 삼성종합화학주식회사 A process for producing aromatic polycarboxylic acid

Also Published As

Publication number Publication date
JPS5751374B2 (en) 1982-11-01

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