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AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsKenichi Nakamura, Shuji Ebata, Fumio Tanaka, Takuji Shitara
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In a process for producing a polynitrile compound comprising introducing a polysubstituted organic compound (POC) which is a carbon ring or heterocyclic compounds having a plurality of organic substituents into a reactor with ammonia and a gas containing oxygen and ammoxidizing POC in the presence of a catalyst, at least a portion of the unreacted POC and a mononitrile compound of an intermediate product in the reaction gas discharged from the reactor is separated, recovered and recycled to the reactor so that the flow rate of the mononitrile compound at the outlet of the reactor is 2 to 16% by mole of the total flow rate of POC and the mononitrile compound supplied to the reactor. Burning reaction of the side reaction is suppressed and the loss of POC can be decreased without adverse effects on productivity and the polynitrile compound can be obtained at a high yield.
A process for producing a polynitrile compound which comprises introducing a polysubstituted organic compound selected from carbon ring compounds having a plurality of organic substituents and heterocyclic compounds having a plurality of organic substituents into a reactor in combination with ammonia and a gas containing oxygen and ammoxidizing the polysubstituted organic compound in a presence of a catalyst, wherein at least a portion of the unreacted polysubstituted organic compound and a mononitrile compound of an intermediate product which are contained in a reaction gas discharged from the reactor is separated, recovered and recycled to the reactor in a manner such that a flow rate by mole of the mononitrile compound at an outlet of the reactor is adjusted in a range of 2 to 16% based on a total of flow rates by mole of the polysubstituted organic compound and the mononitrile compound supplied to the reactor.
Dependencies are inferred from the claim text.