METHOD FOR PRODUCTION OF FATTY ACID POLYVALENT METAL SALTS Russian patent published in 2005 - IPC

FIELD: production of vegetable oils and fats acid polyvalent metal salts useful as catalysts and siccatives in tannery, paint-vehicle industry, etc.

SUBSTANCE: claimed salts are obtained by reaction of alkali salts of fatty acids with aqueous solution of water soluble polyvalent metal salt or mixture thereof. Alkali or ammonia salts are obtained by qualitative alkali hydrolysis of respective vegetable oil, fats, low viscous oxidates or mixture thereof under strenuous stirring and gradual temperature rising from 20-30°C to 60-100°C with equivalent amount alkali or ammonium in form of 3,26-48,46 % aqueous solution for 3-10 min in presence of initial additive of sodium stearate or oleate in amount of 0.5-1.0 % based on mass of hydrolyzed substance up to residual alkali content in system not more than 2-3 % based on starting value, followed by stirring for 10-15 min. In obtained reaction mixture under stirring and at mentioned above elevated temperature previously prepared and heated up to 60-98°C aqueous solution of water soluble polyvalent metal salt or mixture thereof for 10-20 min is introduced in amount of 1 g-eq/mol of alkali used for hydrolysis followed by stirring for 15-20 min. Then obtained salt composition is separated from aqueous phase by filtration, centrifugation or extraction with organic solvent.

EFFECT: polyvalent metal salts with anion composition fully (quantitatively and qualitatively) corresponding to acid composition of respective oil or fat.

5 cl, 3 tbl, 21 ex