发明名称 |
Process for preparing color-stabilized acetaminophen |
摘要 |
A method is provided for purifying a crude N-acetyl-para-aminophenol (APAP) containing color bodies or their precursors, the method comprising: a) forming a wet crude APAP; and b) subsequently drying said crude APAP in the presence of a sufficient amount of an acetylating agent for a sufficient period of time to convert said color bodies or their precursors to substantially non-color bodies.
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申请公布号 |
US5344979(A) |
申请公布日期 |
1994.09.06 |
申请号 |
US19930054733 |
申请日期 |
1993.04.29 |
申请人 |
HOECHST CELANESE CORPORATION |
发明人 |
ZEY, EDWARD G.;BLAY, GEORGE A. |
分类号 |
C07C231/24;(IPC1-7):C07C231/24 |
主分类号 |
C07C231/24 |
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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