Bis-bibenzimidazole composition

Details Bis-bibenzimidazole composition Bis-bibenzimidazole composition

C - Chemistry, Metallurgy

07

D

C07D 235/20 (2006.01) C07D 487/14 (2006.01) C22B 3/26 (2006.01) C22B 3/36 (2006.01)

Patent

CA 2062035

SMC 36233 ABSTRACT Bis-bibenzimiazole Composition A composition of bibenzimidazoles of the Formula (I): Image (I) wherein X & Y which may be the same or different and, taken together, contain a total of from 12 to 52 saturated carbon atoms, are (a) each selected from -R, -COR, -CH2COOr, -CH(COOR)2 and -COOR; or (b) together form a group selected from Image and Image wherein R is an optionally substituted hydrocarbyl group, A & B taken together with the two carbon atoms to which they are linked form an optionally substituted benzene ring; and C & D taken together with the teo carbon atoms to which they are linked form an optionally substituted benzene ring; characterised in that at least 50% by weight of the bibenzimidazoles in the composition are of Formula (II) Image (II) SMC 36233 wherein X & Y are as hereinbefore defined; T, U, V & W which may be the same different, are H, R1 or OR1 provided at least one of T, U, V & W is R1 or OR1; and R1 is C1-6-alkyl; which are suitable for use in the extraction of zinc from aqueous solutions of zinc in the presence of other metals.

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