Preparation method for homoserine lactone hydrochloride
A technology of homoserine lactone and hydrochloride, which is applied in the chemical industry, can solve the problems of high environmental and on-site operation requirements, non-compliance with green production environmental protection requirements, and high raw material prices, so as to reduce consumption and cost input and yield High, high reaction conversion effect
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Embodiment 1
[0014] Weigh 150.0g of DL-methionine solid and 94.5g of monochloroacetic acid solid, put them into a ball mill at a speed of 1000r / min, grind at normal pressure 25°C for 30min, rinse with ethanol and dry to obtain 135g of white solid powder DL-homoserine Lactone hydrochloride. Detect product by melting point method and calculate product purity and reaction conversion rate: product melting point 216-222.5 ℃ (decomposition) (literature value 220-221 ℃), calculate DL-homoserine lactone hydrochloride content 99.0%, DL-methionine conversion The rate is 98.14%.
Embodiment 2
[0016] Weigh 150.0g of L-methionine solid and 94.5g of monochloroacetic acid solid, put them into a ball mill at a speed of 1000r / min, grind at normal pressure 30°C for 30min, rinse with ethanol and dry to obtain 130g of white solid powder L-homoserine Lactone hydrochloride. The product is detected by the melting point method and the product purity and conversion rate are calculated: the melting point of the product is 219-221°C (literature value 220-221°C), the calculated L-homoserine lactone hydrochloride content is 99.5%, and the L-methionine conversion rate is 94.5% %.
Embodiment 3
[0018] Weigh 150.0g of D-methionine solid and 94.5g of monochloroacetic acid solid, put them into a ball mill at a speed of 1000r / min, grind for 30min at normal pressure 35°C, rinse with ethanol and dry to obtain 132g of white solid powder D-homoserine Lactone hydrochloride. The product is detected by the melting point method and the product purity and reaction conversion rate are calculated: the product melting point is 218-220°C (literature value 220-221°C), the calculated D-homoserine lactone hydrochloride content is 99.3%, and the D-methionine conversion rate is 95.9% %.
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