C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/510.2
C07C 63/20 (2006.01) C07C 63/68 (2006.01) C07F 1/00 (2006.01)
Patent
CA 1051012
Abstract The copper II salt of 4-chlorophthalic acid prepared by reacting 4-chlorophthalic acid or a mono- alkali metal salt thereof with copper II ion in aqueous solution under conditions of controlled pH. The copper II salt of 4-chlorophthalic acid is useful as an intermediate in the preparation of chlorine-containing copper phthalo- cyanine pigment.
236060
E.i. Du Pont de Nemours And Company
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