FOERBAETTRAT FOERFARANDE FOER RENING AV ASETAMINOFEN

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 adsordent carbon, e.g., an activate...

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Bibliographic Details
Main Authors FRUCHEY, O. STANLEY, WHEELER, LARRY O, ZEY, EDWARD G
Format Patent
LanguageFinnish
Published 01.11.1991
Edition5
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary: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 adsordent 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.
Bibliography:Application Number: FI19910005164