METHOD FOR PRODUCING ACRYLONITRILE AND PREPARING HYDROGEN CYANIDE AND ACETONITRILE AS CO-PRODUCTS (VARIANTS) Russian patent published in 2005 - IPC

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to methods (variants) for producing acrylonitrile and preparing hydrogen cyanide and acetonitrile as co-products. Methods involve addition of hydrocarbon that is taken among propylene or propane, ammonia and oxygen-containing gas to the reaction zone containing a catalyst for oxidative ammonolysis and reaction is carried out at increased temperature to form acrylonitrile, hydrogen cyanide and acetonitrile, and isolation of acrylonitrile, hydrogen cyanide and acetonitrile from reactor also. According to the first variant reaction is carried out in the presence of alcohols mixture containing methanol and a second alcohol among ethanol, propanol or their mixtures wherein the weight ratio of methanol to the second alcohol in alcohols mixture is maintained depending on necessary amounts of hydrogen cyanide and acetonitrile. According to the second variant reaction is carried out in the presence of alcohols mixture containing methanol and ethanol taken in the weight ratio from about 99:1 to 1::99. According to the third variant reaction is carried out in the presence of one or more alcohols taken among crude methanol, crude ethanol or crude propanol. According to the fourth variant reaction is carried out in the presence of one or more crude (C₁-C₄)-alcohol. Proposed method provides enhancing yield of one or both co-products, i. e. HCN and acetonitrile, formed in producing acrylonitrile.

EFFECT: improved producing method.

21 cl, 2 tbl, 8 ex