Process for preparing color-stabilized acetaminophen

Details Process for preparing color-stabilized acetaminophen Process for preparing color-stabilized acetaminophen

1993-04-29

1994-09-06

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564144, 564223, C07C23124

Patent

active

053449797

ABSTRACT:
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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