Process for enhancing the filterability of organic pigments

Details Process for enhancing the filterability of organic pigments Process for enhancing the filterability of organic pigments

1990-09-26

1991-05-07

Silverman, Stanley

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210778, 106493, B01D 3702

Patent

active

050134558

ABSTRACT:
A process for enhancing the filterability of organic pigments, which comprises adding to an aqueous pigment suspension 0.5 to 15% by weight, based on the pigment, of an unbranched aliphatic 1,2-dihydroxy compound containing 8 to 22 carbon atoms, and stirring the mixture for at least 15 minutes in the temperature range from 20.degree. to 100.degree. C.
Pigments treated by the process of this invention have substantially enhanced filterability as compared with identical pigments which have not been treated with the 1,2-dihydroxy compound.

REFERENCES:
patent: 4810390 (1989-03-01), Flierl et al.

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