欧盟法规
REACH注册C&L通报REACH预注册专利信息
专利号:US-4702744-A
优先权日:1985-06-13
标题:Process for the preparation of concentrated solutions of anionic dyestuffs and dyestuff additives by cation exchange with cation exchange resin
发明人:WOLFF JOACHIM; KOLL JOCHEN; WOLF KARLHEINZ; KLIPPER REINHOLD M; LANGE PETER M
权利人:BAYER AG
摘要:Stable, concentrated aqueous solutions of, in particular, anionic reactive dyestuffs are obtained in a comparatively simple manner by freeing from salts, preferably by means of membrane separation processes, solutions of these substances just as they are obtained in the course of synthesis, and by replacing, with the aid of ion exchangers, the cations which cause sparing solubility.
专利号:CA-1283919-C
优先权日:1985-04-03
标 题:Synthesis and use of novel pyrazolo(3,2-c)-s-triazole photographic couplers