"PROCESS FOR PREPARING DYES AND/OR BRIGHTENER FORMULATIONS"

Application 1226/DEL/1999 published 2007-01-12, filed 1999-09-14
Process for preparing formulations comprising dyes and/or brighteners which possess at least one free SO3H and/or COOH group, characterized in that an aqueous suspension comprising a) dyes and/or brighteners which possess at least one free SO3H and/or COOH group and b) inorganic synthesis salts is desalinated using a microfiltration membrane having pore diameters of from 0.05 to 40 um.

Applicant

1)BAYER AKTIENGESELLSCHAFT,
:D-51368 LEVERKUSEN, GERMANY Germany

Inventor

1)WOLFGANG ZARGES 2)ROLF BROCKMANN 3)ERWIN BACHER 4)DETLEF SZEYMIES

International Info

Classification: C11D 003/42

Priority Information

198 43 381.6 Germany 1998-09-22