| 主权项 |
1. A magnetic reagent for separating a value mineral from a non-value mineral, said reagent comprising:
a plurality of magnetite microparticles having an average diameter of less than 50 microns; and a compound of formula (I),
R—(CONH—O—X)n (I) wherein the compound of formula (I) has a molecular weight of about 2,000 or less; n is an integer from 1 to 3; each X is individually selected from the group consisting of H, M and NR′4, wherein M is a metal ion; and each R′ is individually selected from the group consisting of H, C1-C10 alkyl, C6-C10 aryl, and C7-C10 aralkyl; R comprises from about 1 to about 50 carbons; andwherein the plurality of magnetite microparticles and the compound of formula (I) are present in a weight ratio of magnetite microparticles: compound of formula (I) from about 10:1 to about 1:10. |
