JPS54160330A - Preparation of high-purity terephthalic acid of stable quality - Google Patents
Preparation of high-purity terephthalic acid of stable qualityInfo
- 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
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
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)
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)
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 |
-
1978
- 1978-06-05 JP JP6808878A patent/JPS54160330A/en active Granted
Patent Citations (2)
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)
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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