| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for increasing production of acetonitrile and hydrocyanic acid, capable of stably increasing the production of the acetonitrile and the hydrocyanic acid when acrylonitrile is produced by ammoxidation reaction of propylene, capable of preventing a yield of the acrylonitrile from being decreased, and making it possible that the reaction is stably continued for a long period. SOLUTION: This method for increasing the production of the acetonitrile and the hydrocyanic acid comprises using a catalyst which is supported on silica and comprises an oxide composition expressed by the formula (1): Moy Bip Feq Aa Bb Cc Dd Oe (A is Ni and/or Co; B is one or more kinds of elements selected from K, Rb, and Cs; C is Mg and/or Zn; and D is one or more kinds of elements selected from rare earth elements), feeding a fluidized bed reactor with one or more kinds of compounds selected from methyl acetate, acetone and methyl ethyl ether in a ratio on carbon base of 0.005-0.2 per propylene, and controlling an oxygen concentration in the outlet gas of the reactor to be 0.1-1.5 vol.%, when the acrylonitrile is produced by subjecting the propylene, ammonia, and oxygen to the ammoxidation reaction with the reactor in the presence of the catalyst. |
