| 主权项 |
1. A method for froth flotation of a mineral-containing ore, the method comprising contacting the ore with:
a) a product obtainable by the condensation, in one or several steps, of:
i) a compound having the formulawhere R1 is a hydrocarbyl group having 7-24 carbon atoms, which may be branched or linear, saturated or unsaturated, AO is an alkyleneoxy group having 2-4 carbon atoms, n is a number between 0 and 20, and Y is O, C(═O)NH or NZ, where Z is a group R2, where R2 is a C1-C4 alkyl group, or the benzyl group, provided that when Y is NZ or C(═O)NH, then n is ≧1;
ii) a dicarboxylic acid or a derivative thereof having the formula (IIa) or (IIb)where D is —OH, —Cl, or —OR4, where R4 is a C1-C4 alkyl group; R3 is an alkylene radical of formula —(CH2)z—, in which z is an integer from 0 to 10, and in which the alkylene radical may be substituted by 1 or 2 —OH groups; the group —CH═CH—, a cycloalkylene, a cycloalkenylene, or an arylene group; and
iii) an alkanolamine having the formula (III)where each x independently is a number between 1 and 5 and Σx on average is a number between 2 and 10, AO is an alkyleneoxy group having 2-4 carbon atoms, R5 is a C1-C3 alkyl group or a group [AO]x where AO and x have the same meaning as above;followed by reaction with an alkylating agent R6X, where R6 is a hydrocarbyl group and X− is an anion derived from the alkylating agent R6X; or
b) a product obtainable by the condensation of:
i) compound (I), or of a compound obtained by partial or total quaternisation of (I);ii) (IIa) or (IIb); andiii) a compound obtained by partial or total quaternisation of the alkanolamine (III). |
