ACIDES EPOXY-ETHANE POLYPHOSPHONIQUES SUBSTITUES, ET SELS ET ESTERS DE CEUX-CI

摘要

1312423 Sequestering MONSANTO CO 19 April 1971 [13 April 1970] 26859/71 Heading C1C [Also in Divisions C2 and D1] Metal ions contained in water are sequestered by incorporating into the water a compound of Formula I where X and Y are -P(O)(OR) 2 , -C(O)-OR, hydrogen, optionally substituted phenyl or C 1-30 alkyl, and each R is a hydrogen, metal or optionally substituted ammonium ion. The sequestered ions may be ferric, calcium, copper, nickel, cobalt or chromium ions.