| 摘要 |
The invention relates to adducts of phosphinic acid with maleic acid semiesters and salts thereof corresponding to the following general formula <IMAGE> in which R1 is hydrogen or a methyl group, R2 is a linear or branched, optionally hydroxyl substituted C8-C18 alkyl or cycloalkyl group or an aryl group corresponding to the formula <IMAGE> in which R3 and R4 may be the same or different and are hydrogen or a linear or branched unsubstituted C7-C12 alkyl group, M is H, Na, K or NH4, m is an integer of from 1 to 8, and n is 1 or 2. The invention also relates to a process for production of the adducts and to their use for the flotation of non-sulfidic minerals. |
