Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
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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American Hoechst Corporation
Higel Floyd D.
Williams Stephan P.
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