Sepg. gold and silver complexes from aq. systems of cyanide or halogen - by absorption on strongly basic anion exchanger based on polymeric crosslinked organo:siloxane ammonium cpds.

摘要

The complexes are sepd. from the aq. systems by contacting with exchanger (I) based on polymeric crosslinked organosiloxane ammonium cpds. with silicic acid-like backbone. (I) comprises units of formula (1) (where R1, R2 = gp. of formula (2); where N atoms in unit of formula (1) are linked with Si atoms in gp. of formula (2) through gps. R6; R3 has same meaning as R1 or R2 = opt. branched 1-20C alkyl, 5-8C cycloalkyl, or benzyl.