A kind of preparation method of diethyl methylphosphonite
A technology of diethyl methylphosphonite and methylphosphine dichloride, which is applied in the field of preparation of diethyl methylphosphonite, can solve the problems of cumbersome recovery process, low recovery rate and high price, and improve the Reaction yield, low production cost, low cost effect
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[0029] Add ethanol, solvent and calcium oxide (the proportioning of each component is shown in the following table 1) in the reactor, heat up and reflux for 2h; then under the protection of nitrogen, slowly drop methyl phosphine dichloride 40g under cooling and stirring, After dripping, raise the temperature to 30°C and keep it warm for 4 hours to obtain a reaction liquid; filter the obtained reaction liquid, wash the filter cake with a small amount of solvent, and finally rectify the filtrate under reduced pressure to obtain diethyl methylphosphonite.
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