Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1983-01-31
1984-10-02
Waltz, Thomas A.
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
252402, 564 4, C07C10338
Patent
active
044749856
ABSTRACT:
A process for increasing the color-free shelf life of a crude N-acetyl aminophenol prepared by the acetylation of an aminophenol wherein the N-acetyl aminophenol contains color-forming impurities which are the products of oxidation of the aminophenol and other side reactions. The process comprises dissolving the crude N-acetyl aminophenol in a solvent containing a reducing agent, heating the solution at about the boiling point, crystallizing the N-acetyl aminophenol from the solution, washing the crystalline N-acetyl aminophenol with solvent containing reducing agent and thereafter separating and drying the crystalline N-acetyl aminophenol.
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Keel Billy L.
Klaus Irvin S.
Oftedahl Marvin L.
Beusen Jon H.
Cole Arnold H.
Logomasini James C.
Monsanto Company
Waltz Thomas A.
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