Method of forming copper complexes of azo-dyestuffs using non-sa

Details Method of forming copper complexes of azo-dyestuffs using non-sa Method of forming copper complexes of azo-dyestuffs using non-sa

1981-07-09

1983-08-23

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260145R, 260145C, 260146R, 260147, 260148, 260149, 260150, 260208, C09B 4508, C09B 4518, C09B 4528

Patent

active

044003170

ABSTRACT:
A method of directly producing copperized azo-dyestuffs of predetermined inorganic salt content is disclosed wherein an ortho, ortho'-dihydroxyazo-dyestuff is reacted with about one molar equivalent of a copper (II) compound consisting of from 1.0 to 0.1 molar equivalent of a non-salt-forming copper compound selected from CuCO.sub.3.Cu(OH).sub.2, 2CuCO.sub.3.Cu(OH).sub.2, Cu(OH).sub.2, CuO and mixtures thereof, and correspondingly from 0 to 0.9 molar equivalent of a salt-forming copper (II) compound selected from CuSO.sub.4, CuCl.sub.2 and Cu(NO.sub.3).sub.2. The disclosed method provides standard strength copperized dyestuff compositions at increased yields and without the need to precipitate the product from the reaction solution.

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