Production method of chloromethyl ethyl ether
A technology of chloromethyl ethyl ether and its production method, which is applied in ether preparation, organic chemistry, etc., can solve the problems of cumbersome post-processing and high production cost, and achieve the effects of complete reaction, environment improvement and cost reduction
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Embodiment 1
[0019] Put 320g of paraformaldehyde and 460g of absolute ethanol into a 1000ml reaction bottle, start stirring, control the temperature between 0-20°C, and pass in hydrogen chloride, a by-product of the production of methyl isocyanate, when the ethanol content is lower than 0.5% When standing and stratifying, the bottom layer of chloromethyl ethyl ether has a weight of 928g, a content of 99.1%, and a yield of 97.3%. In terms of ethanol, it can directly carry out the synthesis of compounds such as acetochlor; the formaldehyde in the upper aqueous solution can be recycled and used mechanically.
Embodiment 2
[0023] 320g of paraformaldehyde and 485g of 95% ethanol (industrial grade) are dropped into a 1000 ml reaction bottle, and the stirring is started, and the temperature is controlled between 0-20° C., and the by-product hydrogen chloride produced in the production of methyl isocyanate is introduced. When the ethanol content is lower than 0.5%, stand for stratification, the bottom layer of chloromethyl ethyl ether has a weight of 885g, a content of 99.1%, and a yield of 92.8%. In terms of ethanol, it can directly carry out the synthesis of compounds such as acetochlor; formaldehyde can be recycled.
Embodiment 3
[0025] Put 865g of 37% formaldehyde aqueous solution and 485g of 95% ethanol into a 1000ml reaction bottle, start stirring, control the temperature between 0-20°C, and pass the by-product hydrogen chloride in the production of methyl isocyanate, when the ethanol content When it is lower than 0.5%, it is allowed to stand for stratification. The weight of chloromethyl ethyl ether in the bottom layer is 875g, the content is 98.3%, and the yield is 91.0%. In terms of ethanol, it can directly carry out the synthesis of compounds such as acetochlor, and the formaldehyde in the upper aqueous solution can be recovered apply.
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