| abstract |
(57) [Summary] (Modified) [Structure] The composition of the bibenzimidazole represented by the formula (II) and the compound represented by the formula (II) itself. [Wherein, X and Y are the same or different independent groups, or are a group having a total saturated carbon number of 12 to 52, which are bonded together to form one divalent group, (a) -R, -CH 2 CO Forming an OR, —COO, etc., or (b) linked together to form the following groups: Where R is an optionally substituted hydrocarbyl group; T, U, V and W are the same or different groups and are H, R 1 or OR 1 , but T, U, At least one of V and W is R 1 or OR 1 ; R 1 is C 1 -C 6 alkyl] [Effects] This composition comprises zinc from an aqueous solution of zinc in the presence of other metals. It is suitable for use in extraction and is a better metal extractant than the prior art bisbenzimidazole-based compositions containing no substituents at the 5,5 ', 6 or 6'-position. |