JPS54160330A - Preparation of high-purity terephthalic acid of stable quality - Google Patents

Preparation of high-purity terephthalic acid of stable quality

Info

Publication number
JPS54160330A
JPS54160330A JP6808878A JP6808878A JPS54160330A JP S54160330 A JPS54160330 A JP S54160330A JP 6808878 A JP6808878 A JP 6808878A JP 6808878 A JP6808878 A JP 6808878A JP S54160330 A JPS54160330 A JP S54160330A
Authority
JP
Japan
Prior art keywords
constant
terephthalic acid
dialkylbenzene
hydrogen
exhaust 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
JP6808878A
Other languages
Japanese (ja)
Other versions
JPS6236024B2 (en
Inventor
Katsuya Murakami
Yuji Kadowaki
Ichiro Harada
Takanori Tsugiya
Katsuhiko Nishiguchi
Tetsuo Mizukami
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.)
Kuraray Yuka Co Ltd
Original Assignee
Kuraray Yuka 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 Kuraray Yuka Co Ltd filed Critical Kuraray Yuka Co Ltd
Priority to JP6808878A priority Critical patent/JPS54160330A/en
Publication of JPS54160330A publication Critical patent/JPS54160330A/en
Publication of JPS6236024B2 publication Critical patent/JPS6236024B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To maintain the coloration and 4-CBA content of terephthalic cid constant, by controlling the reaction conditions in air oxidation of a p-dialkylbenzene constant while measuring the components in the exhaust gas continuously.
CONSTITUTION: A p-dialkylbenzene is oxidized with air in the presence of a heavy metal catalyst and a brimine compound in acetic acid to give terephthalic acid. The contents of gaseous carbon constituents comprising CO, CO2 and methyl acetate and hydrogen or methane in the reactor exhaust gas are determined continuously or intermittently to control the reaction conditions, e.g. temperatures. (1) The hydrogen or methane content in the exhaust gas or formation rate of hydrogen or methane and (2) the ratio of the formation rate of the gaseous, carbon constituents to the p-dialkylbenzene feed rate are maintained constant to form terephthalic acid of constant quality.
COPYRIGHT: (C)1979,JPO&Japio
JP6808878A 1978-06-05 1978-06-05 Preparation of high-purity terephthalic acid of stable quality Granted JPS54160330A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6808878A JPS54160330A (en) 1978-06-05 1978-06-05 Preparation of high-purity terephthalic acid of stable quality

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6808878A JPS54160330A (en) 1978-06-05 1978-06-05 Preparation of high-purity terephthalic acid of stable quality

Publications (2)

Publication Number Publication Date
JPS54160330A true JPS54160330A (en) 1979-12-19
JPS6236024B2 JPS6236024B2 (en) 1987-08-05

Family

ID=13363625

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6808878A Granted JPS54160330A (en) 1978-06-05 1978-06-05 Preparation of high-purity terephthalic acid of stable quality

Country Status (1)

Country Link
JP (1) JPS54160330A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4835307A (en) * 1984-12-13 1989-05-30 Amoco Corporation Method and apparatus for controlling the manufacture of terephthalic acid to control the level and variability of the contaminant content and the optical density
EP0858989A1 (en) * 1997-02-12 1998-08-19 Mitsui Chemicals, Inc. Method of controlling the quality of terephthalic acid

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51127037A (en) * 1975-04-11 1976-11-05 Ici Ltd Continuous production of telephthalic acid
JPS5334738A (en) * 1976-09-09 1978-03-31 Toray Ind Inc Continuous preparation of terephthalic acid

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51127037A (en) * 1975-04-11 1976-11-05 Ici Ltd Continuous production of telephthalic acid
JPS5334738A (en) * 1976-09-09 1978-03-31 Toray Ind Inc Continuous preparation of terephthalic acid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4835307A (en) * 1984-12-13 1989-05-30 Amoco Corporation Method and apparatus for controlling the manufacture of terephthalic acid to control the level and variability of the contaminant content and the optical density
EP0858989A1 (en) * 1997-02-12 1998-08-19 Mitsui Chemicals, Inc. Method of controlling the quality of terephthalic acid

Also Published As

Publication number Publication date
JPS6236024B2 (en) 1987-08-05

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