| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a nitrile compound from a carbocyclic compound or a heterocyclic compound having an organic substituent, ammonia and air by a vapor-phase catalytic ammoxidation reaction, realizing a reaction under a good condition by adjusting a supplied gas composition and the contact time, or the like, without using a particular auxiliary apparatus and producing the nitrile compound on an industrial scale in high yield at a low cost. SOLUTION: The residual gas component left after the separation of the nitrile compound from the ammoxidation reaction gas is returned to a reactor at a specific ratio while keeping the molar ratio of the molecular oxygen to the organic substituent of the carbocyclic compound or heterocyclic compound supplied to the reactor within a specific range. COPYRIGHT: (C)2003,JPO
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