MINERAL COLLECTOR COMPOSITIONS OF FATTY HYDROXAMIC ACIDS MIXED WITH OILS AND A METHOD FOR PREPARATION THEREOF

摘要

FIELD: mineral dressing. SUBSTANCE: alkylhydroxamic acid salt is prepared by reaction of C6-C22-fatty acid ester with hydroxylamine salt and base in presence of oil and water and then acidified to form organic and aqueous layer, the former containing C6-C22- fatty hydroxamic acid essentially free of starting esters and ester hydrolysis and reesterification products. Organic layer is separated from aqueous layer and is used to prepare title composition. EFFECT: increased yield of composition and simplified procedure. 7 cl, 3 tbl, 32 ex