Process for the preparation of high yield pigments

Details Process for the preparation of high yield pigments Process for the preparation of high yield pigments

C - Chemistry, Metallurgy

09

B

260/275, 260/321

C09B 48/00 (2006.01) C09B 57/04 (2006.01) C09B 67/10 (2006.01) C09B 67/22 (2006.01) C09B 67/54 (2006.01)

Patent

CA 1296006

Process for the preparation of high yield pigments Abstract of the Disclosure A process for the preparation of high yield pigments of the series of the diketopyrrolopyrroles, quinacridones, isoindolinones and isoindolines by protolysis of the pigment salt obtained by treating the crude pigment with a strong base or of the pigment salt obtained in the course of the synthesis, which process comprises treating said pigment salt, in an organic solvent, with water such that the organic solvent is simultaneously removed during the protolysis. The pigments so obtained are high yield pigments and have a particularly fine crystalline form and excellent purity.

501023

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