USE OF ASPARAGINIC ACID DERIVATIVE AS COLLECTOR IN FOAM FLOATATION PROCESSES Russian patent published in 2009 - IPC B03D1/02 B03D1/04 

FIELD: chemistry.

SUBSTANCE: present invention pertains to use of asparaginic acid derivative as a collector of calcic-phosphate-containing minerals, such as apatite, during foam floatation. The derivative has formula (I), where R^I is a hydrophobic group, containing a hydrocarbon group with 6-24 carbon atoms; R^II is an alkyl group with 1-7 carbon atoms or a group with formula (B)_yH, where B is an alkyleneoxy group with 2-4 carbon atoms, y assumes values from 1 to 10; M is a group, selected from a group consisting of a cation or hydrogen. According to the method of producing the derivative, maleic acid or its salt is reacted in alkaline conditions with a primary amine, with subsequent reaction of the obtained intermediate compound with glycidyl ester. The obtained intermediate compound is then reacted with a halide compound.

EFFECT: increased efficiency of floatation.

18 cl, 2 ex, 4 tbl