Patent ID: 6462235
Filing Date: 2002-10-08
Classification: C07C

Abstract:
A process for producing an oxime, comprising:reacting a carbonyl compound in the liquid phase with hydrogen peroxide and ammonia in the presence of a) a heterogeneous catalyst and b) an ammonium salt, a substituted ammonium salt or a mixture of an ammonium salt and a substituted ammonium salt; wherein said heterogeneous catalyst comprises titanium, silicon and oxygen; wherein said ammonium salt or said substituted ammonium salt is represented by formula: [R1R2R3R4]+Xâˆ’wherein R1, R2, R3 and R4 each independently of one another are hydrogen, an aliphatic, unbranched or branched alkyl radical having 1 to 20 carbon atoms, a cycloaliphatic radical having 3 to 12 carbon atoms, or an aromatic radical having a total of 6 to 12 carbon atoms; and wherein Xâˆ’ is an anion.