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
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 title abstract 8
- 238000000746 purification Methods 0.000 title 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 9
- 239000007789 gas Substances 0.000 abstract 3
- 239000002904 solvent Substances 0.000 abstract 3
- 230000001590 oxidative effect Effects 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- -1 polyethylene terephthalate Polymers 0.000 abstract 1
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract 1
- 239000005020 polyethylene terephthalate Substances 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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 |
| 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 |
| DE2906945A DE2906945C2 (en) | 1978-02-23 | 1979-02-22 | Process for obtaining high-purity 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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