Process for producing nitrile compounds
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsTakuji Shitara, Takashi Okawa, Shuji Ebata, Fumisada Kosuge
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Abstract
There is disclosed a process for producing a nitrile compounds by ammoxidation of a carbocyclic or heterocyclic compound having organic substituent(s) by reacting the compound with ammonia and an oxygen-containing gas, wherein unreacted ammonia is recovered from the reaction product gas and recycled to the reaction system.
Claims11
A process for producing a nitrile compounds by ammoxidation of a carbocyclic or heterocyclic compound having organic substituent(s) in which said compound was reacted with ammonia and an oxygen-containing gas, comprising:
- conducting the ammoxidation by vapor-phase catalytic reaction in the presence of a fluid catalyst containing at least one metal oxide selected from the group consisting of vanadium oxide, molybdenum oxide and iron oxide while controlling a water content of a gas fed to a reactor to 12% by volume or lower;
- recovering unreacted ammonia from a reaction product gas obtained by the ammoxidation;
- and
- recycling the recovered ammonia to the reaction system.
A process for producing a nitrile compounds by ammoxidation of a carbocyclic or heterocyclic compound having organic substituent(s) in which said compound is reacted with ammonia and an oxygen-containing gas, comprising:
- separating the nitrile compounds from a reaction product gas obtained by the ammoxidation;
- absorbing unreacted ammonia and by-produced hydrogen cyanide present in the residual gas, in water;
- distilling the obtained solution under a pressure of 0.2 to 0.7 MPa to recover the ammonia and hydrogen cyanide therefrom;
- and
- recycling the recovered ammonia and hydrogen cyanide to reaction system.
Dependencies are inferred from the claim text.