METHOD FOR FLOATATION OF MATERIALS CONTAINING ALKALI-EARTH METAL Russian patent published in 1994 - IPC

FIELD: concentration of mineral deposits. SUBSTANCE: method involves treating ore with collector containing monocarboxylic fatty acid and monoesterified dicarboxylic acid, and separating a valuable component into foam product. Fatty acid has a general formula R^ICOOH where R^I - hydrocarbon group with 5-23 carbon atoms while monoesterified dicarboxylic acid has a general formula where R^II - aliphatic hydrocarbon group with 7-21 carbon atoms; R^III - hydrocarbon residue with 2-6 carbon atoms; A - alkyleneoxy-group consisting of alkylene oxide with 2-4 carbon atoms, the weight ratio between monoesterified dicarboxylic acid and the total amount of fatty acid ranges from 1: 15 to 9:1; A may be represented by oxyethylene group; R^III is a -CH=CH- group or -C₆H₄- phenyl group; monocarboxylic acid contains acyl group with 10-18 carbon atoms; the weight ratio between monoesterified dicarboxylic acid and monocarboxylic acid varies from 1:7 to 6: 1. EFFECT: higher efficiency. 5 cl