Bis-bibenzimidazole composition

A composition of bibenzimidazoles of the Formula (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 whe...

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Bibliographische Detailangaben
Hauptverfasser:	THORP, DEREK, QUAN, PETER M, DALTON, RAYMOND F
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS HETEROCYCLIC COMPOUNDS METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS SEPARATION TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A composition of bibenzimidazoles of the Formula (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 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 two 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) wherein X and Y are as hereinbefore defined; T, U, V & W which may be the same or different, are H, R or OR provided at least one of T, U, V & W is R or OR ; and R 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.