JPS54112833A - Purification of terephthalic acid - Google Patents
Purification of terephthalic acidInfo
- Publication number
- JPS54112833A JPS54112833A JP2022578A JP2022578A JPS54112833A JP S54112833 A JPS54112833 A JP S54112833A JP 2022578 A JP2022578 A JP 2022578A JP 2022578 A JP2022578 A JP 2022578A JP S54112833 A JPS54112833 A JP S54112833A
- Authority
- JP
- Japan
- Prior art keywords
- terephthalic acid
- acetic acid
- solvent
- condensate
- dialkylbenzene
- 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: To obtain high-purity terephthalic acid, by suspending crude terephthalic acid, prepared by oxidizing a p-dialkylbenzene in an acetic acid solvent, with a condensate obtained rom evaporated gas as a suspending solvent at a specific temperature to remove impurities effectively.
CONSTITUTION: Crude terephthalic acid, obtained by oxidizing a p-dialkylbenzene with an oxygen-containing gas in th presence of a Co, an Mn, and a Br compounds in acetic acid solvent, is suspended and purified by an aqueous acetic acid, which is a condensate obtained from an evaporated gas, at 100°C or above, preferably 140W 230°C. The condensate preferably contains 5W20 wt.% of water.
USE: Raw material for direct polymerization of polyethylene terephthalate.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2022578A JPS54112833A (en) | 1978-02-23 | 1978-02-23 | Purification 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 |
---|---|---|---|
JP2022578A JPS54112833A (en) | 1978-02-23 | 1978-02-23 | Purification of terephthalic acid |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54112833A true JPS54112833A (en) | 1979-09-04 |
Family
ID=12021215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2022578A Pending JPS54112833A (en) | 1978-02-23 | 1978-02-23 | Purification of terephthalic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54112833A (en) |
Cited By (1)
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 |
-
1978
- 1978-02-23 JP JP2022578A patent/JPS54112833A/en active Pending
Cited By (1)
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 |
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