Improved method for the purification of acetaminophen

Details Improved method for the purification of acetaminophen Improved method for the purification of acetaminophen

C - Chemistry, Metallurgy

07

C

C07C 231/24 (2006.01) B01J 20/20 (2006.01) C07C 233/25 (2006.01)

Patent

CA 2053604

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 hot aqueous solution of the crude APAP; and b) subsequently contacting the hot solution with an acid washed adsorbent carbon, e.g., an activated carbon, which acid washed carbon, prior to such contact, has been pretreated by contacting it with an aqueous solution of a reducing sulfite.

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