发明名称 |
Process for the oxidative purification of terephthalic acid |
摘要 |
Disclosed is a process to produce a purified carboxylic acid slurry. The process comprises removing impurities from a crystallized product in a solid liquid displacement zone to form the purified carboxylic acid slurry. The purified carboxylic acid slurry is further cooled in a cooling zone and subsequently filtered and dried in a filtration and drying zone. The process produces purified carboxylic acid product having good color and low impurity levels without the use of purification steps like hydrogenation or filtrate purge.
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申请公布号 |
US2004110981(A1) |
申请公布日期 |
2004.06.10 |
申请号 |
US20030645734 |
申请日期 |
2003.08.21 |
申请人 |
SHEPPARD RONALD BUFORD;TENNANT BRENT ALAN;WOODRUFF THOMAS EARL;LIN ROBERT |
发明人 |
SHEPPARD RONALD BUFORD;TENNANT BRENT ALAN;WOODRUFF THOMAS EARL;LIN ROBERT |
分类号 |
C07C51/43;C07C51/47;C07C51/487;(IPC1-7):C07C69/52;C07C51/42 |
主分类号 |
C07C51/43 |
代理机构 |
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代理人 |
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