JPS54154726A - Recovery of terephthalic acid - Google Patents
Recovery of terephthalic acidInfo
- Publication number
- JPS54154726A JPS54154726A JP6347478A JP6347478A JPS54154726A JP S54154726 A JPS54154726 A JP S54154726A JP 6347478 A JP6347478 A JP 6347478A JP 6347478 A JP6347478 A JP 6347478A JP S54154726 A JPS54154726 A JP S54154726A
- Authority
- JP
- Japan
- Prior art keywords
- terephthalic acid
- acid
- acetic acid
- suspension
- crystals
- 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
Links
Abstract
PURPOSE: A suspension containing terephthalic acid resulting from oxidation of organic aromatic compounds in liquid phase is continuously brought into contact with acetic acid countercurrently, thus obtaining high-purity terephthalic acid crystals which can be used for direct polycondensation.
CONSTITUTION: Terephthalic acid is obtained by oxidizing organic aromatic compounds in liquid phase in a lower aliphatic monocarboxylic acid with a gas containing molecular oxygen, wherein the suspension of reaction product is slowly brought into contact with water-containing acetic acid countercurrently at a temperature not more than 10°C lower than the oxidation reaction temperature in the same tower, whereby the reaction mother liquor is replaced with the water-containing acetic acid and simultaneously impurities are extracted from the crystals of terephthalic acid, thus giving the suspension containing high-purity terephthalic acid.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6347478A JPS54154726A (en) | 1978-05-27 | 1978-05-27 | 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 |
---|---|---|---|
JP6347478A JPS54154726A (en) | 1978-05-27 | 1978-05-27 | Recovery of terephthalic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54154726A true JPS54154726A (en) | 1979-12-06 |
Family
ID=13230258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6347478A Pending JPS54154726A (en) | 1978-02-23 | 1978-05-27 | Recovery of terephthalic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54154726A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
JP2008274294A (en) * | 1999-12-17 | 2008-11-13 | Ticona Gmbh | Method and device for separating solid phase from liquid phase |
-
1978
- 1978-05-27 JP JP6347478A patent/JPS54154726A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008274294A (en) * | 1999-12-17 | 2008-11-13 | Ticona Gmbh | Method and device for separating solid phase from liquid phase |
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5555138A (en) | Preparation of highly pure terephthalic acid | |
ES2064912T3 (en) | PROCEDURE TO PRODUCE ISOPHTHALIC ACID OF HIGH PURITY. | |
JPS5384933A (en) | Preparation of terephthalic acid | |
JPS523030A (en) | Process for manufacturing high purity terephthalic acid | |
JPS5337636A (en) | Production of terphthalic acid | |
JPS5432431A (en) | Replacement and separation of mother liquor in terephthalic acid suspension | |
JPS54154726A (en) | Recovery of terephthalic acid | |
JPS57188543A (en) | Preparation of terephthalic acid | |
JPS5587744A (en) | Recovery of terephthalic acid | |
JPS54119427A (en) | Preparation of benzenecarboxylic acid | |
JPS52108946A (en) | Production of purified terephthalic acid | |
JPS5291835A (en) | Prepation of terephtalic acid for direct polymerization | |
JPS54141721A (en) | Preparation of methacrylic acid | |
JPS643147A (en) | Production of high-purity terephthalic acid | |
JPS51136640A (en) | Process for continuous preparation of high purity terephthalic acid | |
JPS5735544A (en) | Preparation of terephthalic acid | |
JPS5681534A (en) | Preparation of terephthalic acid | |
JPS5214739A (en) | Process for recovery of terephthalic acid | |
GB1155589A (en) | Improved process for the production of Terephthalic Acid | |
JPS57200328A (en) | Preparation of terephthalic acid | |
JPS52101687A (en) | Recovery of catalyst | |
JPS51136639A (en) | Process for continuous preparation of terephthalic acid | |
JPS55143934A (en) | Preparation of terephthalic acid | |
JPS5527037A (en) | Recovering oxidizing catalyst | |
JPS54112833A (en) | Purification of terephthalic acid |