Patent ID: 8591636
Filing Date: 2013-11-26
Classification: B01J,C23C

Abstract:
1. A composition comprising 0.5 to 100 ppm of a zero-valent metal, a stabilizer compound and water; wherein the zero-valent metal is selected from the group consisting of palladium, silver, cobalt, nickel, gold, copper and ruthenium; wherein the stabilizer compound is a compound of formula (I) or formula (II) wherein R 1 and R 5 are independently selected from the group consisting of H, (C 1 -C 6 )alkyl, (CR 6 R 6 ) a Z and (CH═CH)Z; R 2 and R 4 are independently selected from the group consisting of H, (CR 6 R 6 ) a Z, HO(C 1 -C 6 )alkyl, R 7 R 7 N(C 1 -C 6 )alkyl and (CH═CH)Z; R 3 ═H, (C 1 -C 6 )alkyl or NR 7 R 7 ; each R 6 is independently H or NR 7 R 7 ; each R 7 is independently H or (C 1 -C 6 )alkyl; each R 8 is selected from the group consisting of H, (C 1 -C 6 )alkyl and NHR 7 ; each R 9 is H or CO 2 R 6 ; Z═CO 2 R 7 , C(O)NR 7 R 7 or NHR 7 ; a=0-6; wherein (i) at least one of R 1 and R 5 is (CR 6 R 6 ) a Z or (ii) R 3 is NR 7 R 7 ; and wherein at least one R 8 is NHR 7 ; wherein the composition has a pH of from >7 to 14; and wherein the composition is free of precipitate for 3 months upon storage at 20° C.