C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 209/84 (2006.01) C07C 209/90 (2006.01) C07C 211/08 (2006.01) C07C 213/10 (2006.01) C07C 215/08 (2006.01)
Patent
CA 2061914
Case AM-6285+ ABSTRACT A tert-amine which contains an acid-activated color body precursor is treated to prevent it or a derivative thereof, e.g., an amine oxide, betaine, or quaternary ammonium compound, from turning pink when exposed to acidic conditions by contacting it at an effective temperature with a discoloration inhibitor which is (1) an inorganic sulfite selected from alkali metal sulfites and bisulfites, (2) an alkanal containing at least two carbons, (3) an acetylalkylcarbinol, (4) an amido compound which contains a -CO.NH- group, (5) ammonium carbonate, (6) a dialkylacetal, or (7) ascorbic acid. Ambient temperatures are satisfactory for the treatments with the other discoloration inhibitors, but temperatures above 100°C are required when the discoloration inhibitor is an inorganic sulfite.
Borland James E.
Sauer Joe D.
Smith Kim R.
Borland James E.
Corporation Ethyl
Macrae & Co.
Sauer Joe D.
Smith Kim R.
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