Purification of metals

摘要

A solid composition comprises:
MnO2; anda compound represented by the general formula (I);wherein:R is a polymer;each Y is independently a hydrogen or a negative charge;Z is either hydrogen or is not present;each n is independently 1, 2, 3, 4, 5 or 6;wherein the MnO2 is bound to the compound of formula (I) so as to coat the surface thereof. Such a composition may be used for the separation of polyvalent metal species, such as Mo, from one or more accompanying impurities.

主权项

1. A method for separating a polyvalent metal species from one or more accompanying impurities, comprising:
(i) contacting the polyvalent metal species and accompanying impurities with a composition comprising MnO2 and a compound of formula (I): wherein:
R is a polymer;each Y is independently a hydrogen or a negative charge;Z is either hydrogen or is not present;each n is independently 1, 2, 3, 4, 5 or 6; and wherein at least 50% of the surface of the compound of formula (I) is coated with MnO2 so that the polyvalent metal binds to MnO2; (ii) dissolving the MnO2 bound to the polyvalent metal to form a solution; and (iii) contacting the solution with a complexing agent, so that the polyvalent metal binds to the compound of formula (I).