103-81-1 supplier 2-Phenylacetamide Manufacturer

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103-81-1 supplier  2-Phenylacetamide Manufacturer

Production method
Styrene, sulfur, liquid ammonia and water were put into the autoclave and reacted at 165 degrees C, about 6.5MPa pressure, and then heated and evaporated to remove hydrogen sulfide gas, with activated carbon decolorization, cooling, crystallization, filtration, drying and benzoylamide. This method can be improved for continuous piped production, styrene and polyammonium sulfide liquid by volume ratio of 1:2, through high-pressure pipe, reaction temperature of 200 degrees C, reaction pressure of 6-7.8MPa, reaction time of 1.5h. The post-treatment process of the reaction product is similar to that of the autoclave intermittent method. Raw material consumption quota: styrene (99%)1117kg/t, sulfur (98.5%)716kg/t, liquid ammonia (99%) 539kg/t, activated carbon 47kg/t. Another method of production is to heat hydrolysis in sulphuric acid or hydrochloric acid by using benzodiazepine (which is reacted by chlorpylphenic acid and sodium cyanide in a diamide solution). Add benzene acetylene to the concentrated hydrochloric acid, stir to dissolve, and react for half an hour at 50 degrees C. Then slowly add water to the cooling crystallization, after cooling filtration, washing with ice water is crude. Crude products with sodium carbonate solution washing, and then washing with ice water, drying can be more pure benzoylamide. Raw material consumption quota: chlorpyride (95%)1190kg/t, sodium cyanide (95%)527kg/t, dimethylamine (industrial) 20kg/t, sodium carbonate (industrial) 185kg/t, sulphuric acid (92.5%) 1760kg/t.