An acid washed adsorbent carbon used in a method for the...

Details An acid washed adsorbent carbon used in a method for the... An acid washed adsorbent carbon used in a method for the...

B - Operations, Transporting

01

J

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

Patent

CA 2413901

An acid washed adsorbent carbon which has been contacted with an aqueous solution of a reducing sulfite is provided which may be used in a method 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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