PROCESS FOR THE PREPARATION OF COPPER(II) CHLORIDE FROM COPPER(II) OXYCHLORIDE USING TERTIARY AMINE HYDROCHLORIDES

摘要

Copper(II) chloride is prepared from copper(II) oxychloride in a nonpolar solvent, preferably during oxychlorination. As the source of hydrogen chloride, the hydrochlorides of certain tertiary amines having 12-40 carbon atoms in total are utilized. The amine contains at most one N-methyl group and its dissociation constant Ka of the equilibrium reaction NR3H(+)+H2O--NR3+H3O(+) is 10-3.5 to 10-8.5. Preferred tertiary amines are a trialkylamine of 15-36 carbon atoms; an N-alkylazacycloalkane of the formula IMAGE wherein R is alkyl of 6-15 carbon atoms, 5/=n/=8, ALK represents one or more alkyl substituents, and the N-alkylazacycloalkane contains at least 15 carbon atoms; or an N,N-dialkylaniline wherein each alkyl group independently contains 6-12 carbon atoms and the benzene ring is optionally substituted by one or more alkyl groups of 1-3 carbon atoms each.