发明名称 |
Verfahren zur Herstellung von Terephthalsäure |
摘要 |
A terephthalic acid slurry in acetic acid is produced by oxidising p-xylene in acetic acid, removing water by evaporation of a stream of water and acetic acid, and returning acetic acid to the oxidation step. The terephthalic acid is separated from the reaction medium in a first zone to leave a deposit on a band, the deposit is washed with a first aqueous medium in a second zone, removed from the band in a third zone, and admixed with a second aqueous medium. Reaction medium is passed from the first zone to the oxidation step and terephthalic acid is recovered, preferably after further purification. <IMAGE> |
申请公布号 |
DE69230569(T2) |
申请公布日期 |
2000.07.27 |
申请号 |
DE1992630569T |
申请日期 |
1992.02.02 |
申请人 |
E.I. DU PONT DE NEMOURS AND CO., WILMINGTON |
发明人 |
HINDMARSH, ERIC;TURNER, JOHN ARTHUR;URE, ALAN MACPHERSON |
分类号 |
B01J23/42;B01J23/44;C07B61/00;C07C51/265;C07C51/42;C07C51/43;C07C51/487;C07C63/26 |
主分类号 |
B01J23/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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