Preparation process, preparation apparatus and preparation method of methyl phosphinate

The invention discloses an efficient, low-pollution and safe methyl phosphinate preparation process, a corresponding methyl phosphinate preparation apparatus and a methyl phosphinate preparation method, and belongs to the technical field of methyl phosphinate production. According to the present invention, under a negative pressure of -0.095 to -0.001 MPa at a reaction temperature of 35-90 DEG C, methyl phosphorus dichloride and alcohol ROH are subjected to a reaction to prepare the methyl phosphinate, wherein the reaction by-products such as the chlorinated hydrocarbon and the alcohol can instantaneously be vaporized to absorb the heat so as to rapidly take away the heat released by the reaction and make the reaction be stably performed at the low temperature, and the hydrogen chloride, the chlorinated hydrocarbon, the alcohol and the like can be rapidly removed from the reaction system so as to avoid the side reaction occurrence caused by the hydrogen chloride, reduce the generation of the toxic substance,