Method for preparing 3-methoxypropionitrile

The invention discloses a method for preparing 3-methoxypropionitrile. The method is characterized by comprising the following steps of: (1) adding a methanol alkali metal compound into methanol, heating to 30-80 DEG C, and keeping the temperature for a period of time; (2) dropwise adding acrylonitrile, controlling the temperature at 30-80 DEG C, reacting for 2-8 hours after the acrylonitrile is dropwise added, adding a modification additive, modifying the reaction liquid for 30 minutes to obtain methoxypropionitrile, and enabling the residual acrylonitrile to be less than 0.5%; and (3) after the reaction is finished, supplementing the modification additive to generate a precipitate, and distilling to obtain the methoxypropionitrile. Compared with the prior art, the method does not need to operation of removing alkali metal hydroxide, shortens the activation time, and reduces the methanol consumption, and the temperature can meet the requirement in industrial cooling water; the method is simple and easy to op