AMMOXIDATION OF THE CARBOXYLIC ACIDS IN THE MIXTURE OF THE NITRILES Russian patent published in 2007 - IPC C07C253/24 C07C255/03 C07C255/08 

FIELD: chemical industry; petrochemical industry; methods (versions) of the ammoxidation of the carboxylic acids in the mixture of nitriles.

SUBSTANCE: the invention is pertaining to the methods (versions) of the ammoxidation or to the method of increasing of the yield of the acetonitrile in the form of the by-product produced in the process of manufacture of acrylonitrile, which provide for injection of the reactants, which contain at least one hydrocarbon selected from the group, which includes propylene and the propane, at least one С1-С4 carboxylic acid, ammonia and the gas containing the molecular oxygen, into the reaction zone containing the catalyst of the ammoxidation, and realization of the reaction of the indicated reactants above the indicated catalyst at the heightened temperature with production of the yield, which contains acrylonitrile, hydrogen cyanide and acetonitrile. The method may additionally include the contact of the effluent of the reaction zone with the liquid of extinguishing, which contains the water and at least one С₁-С₄ carboxylic acid, and the addition of at least a part of the extinguishing liquid into the reaction zone after the extinguishing liquid contacting the liquid of the reaction zone. The invention allows to increase the yield and, predominantly, the ratio of the by-product - acetonitrile to the acrylonitrile produced in the process of the ammoxidation of the hydrocarbon, such as propylene or propane into acrylonitrile.

EFFECT: the ensures the increased yield and the ratio of the by-product - acetonitrile to the acrylonitrile produced in the process of the ammoxidation of the hydrocarbon, such as propylene or propane into acrylonitrile.

22 cl, 1 tbl, 1 ex