Rare earth salt or phosphoric acid diethyl ester rare earth salt

摘要

Direct reaction of phosphoric acid dioleyl or phosphoric acid dialkyl ester of high purity rare earth and rare earth hydroxide or oxide, phosphoric acid or phosphoric acid dialkyl ester rare earth salt of useful high purity as a polymerization catalyst of the conjugated diene polymer and to provide a method for producing a dioleyl rare earth salt. In the present invention, a non-polar solvent and rare earth hydroxide or rare earth oxide, phosphate dioleyl or phosphoric acid dialkyl ester of high purity, the same elements and the desired product hydrogen halide acid, or phosphorous acid as a catalyst is allowed to react in the presence of at least one compound selected from rare earth halides made of.