| 简介 |
PROBLEM TO BE SOLVED : To provide a rare earth alkoxide solution for an asymmetric synthetic catalyst material exerting stable high catalytic activity, and to provide a method for production thereof.
SOLUTION : This method comprises obtaining a crude rare earth alkoxide solution by reacting a rare earth metal and an alcohol or reacting a rare earth metal chloride and an alkali metal alkoxide in an alcohol-containing solvent, exchanging the alcohol or solvent to a 6-10C aromatic or 5-12C saturated hydrocarbon solvent without completely removing the alcohol or solvent to dry, filtering the resulting solution and adjusting its concentration to produce the rare earth alkoxide solution having high catalytic activity and high reproducibility. |
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