METHOD FOR PREPARING RARE-EARTH ELEMENT CARBOXYLATES

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FIELD : chemical technology. SUBSTANCE : invention relates to the improved method for synthesis of rare-earth element carboxylates. Method involves interaction of rare-earth element oxide or oxides with carboxylic acid or mixture of carboxylic acids at increased temperature in the presence of rare-earth element salt or mixture of rare-earth elements wherein the mole ratio rare-earth element salt or mixture of rare-earth element salts : rare-earth element oxide or rare-earth element oxides is maintained as = 1 : (20-150). The end substances can be used as catalysts used in polymerization of coupled dienes based on rare-earth element carboxylates and can be used in synthesis of cis-1, 4-homopolymers and cis-1, 4-copolymers in industry of synthetic rubbers. Method shows the simplified technology and improved ecology. EFFECT : improved method of synthesis. 10 ex