Ammoxidation process
AssigneeSun Ventures, Inc.
InventorsHoward P. Angstadt, Jack D. Tinkler, Richard V. Norton, Ronald D. Bushick
Life of this patent
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Abstract
In an ammoxidation process where reactant gases comprised of a lower alkyl-substituted aromatic hydrocarbon, oxygen, and ammonia are passed over an ammoxidation catalyst in a fixed or fluidized bed system, the improvement of reducing combustion of hydrocarbon and ammonia and achieving a more favorable product distribution by distributing a stream containing reactant oxygen throughout the catalyst bed.
Claims14
In an ammoxidation process where reactant gases comprised of a lower alkyl-substituted hydrocarbon, oxygen, and ammonia are passed over an ammoxidation catalyst in a fixed or fluidized bed system, the improvement of reducing combustion of hydrocarbon and ammonia burn by distributing said reactant oxygen at a multiplicity of positions along the length of said catalyst bed.
A process for the preparation of an aromatic dinitrile of the benzene and naphthalene series which comprises reacting a lower alkyl-substituted hydrocarbon of the benzene or naphthalene series with ammonia and oxygen at a temperature of between about 350.degree. and about 525.degree. C in the presence of a supported vanadium catalyst in a fixed bed, the mole ratio of ammonia to hydrocarbon being from about 2:1 to about 3:1, the mole ratio of oxygen to hydrocarbon being from about 2:1 to about 3:1, and distributing the oxygen through spaced apart inlets along the length of the bed.
A process for the preparation of terephthalonitrile which comprises reacting p-xylene in a fixed bed mode with ammonia and oxygen at a temperature between about 390.degree. and about 500.degree. C and at a pressure of from about 2 to about 10 atmospheres in the presence of a vanadium bronze catalyst said mole ratio of ammonia to p-xylene being from about 2:1 to about 3:1, the mole ratio of oxygen to hydrocarbon being from about 2:1 to about 3:1, and distributing the oxygen throughout the bed by passing said oxygen through spaced-apart inlets along the length of the bed.
A process for the preparation of an aromatic dinitrile of the benzene and naphthalene series which comprises reacting a lower alkyl-substituted hydrocarbon of the benzene or naphthalene series with ammonia and oxygen at a temperature of between about 350.degree. and about 525.degree. C in the presence of a supported vanadium catalyst in a fluidized bed, the mole ratio of ammonia to hydrocarbon being from about 2:1 to about 3:1, the mole ratio of oxygen to hydrocarbon being from about 2:1 to about 3:1, and distributing the oxygen through spaced apart inlets along the length of the bed.
A process for the preparation of terephthalonitrile which comprises reacting p-xylene in a fluidized bed mode with ammonia and oxygen at a temperature between about 390.degree. and about 500.degree. C and at a pressure of from about 2 to about 10 atmospheres in the presence of a vanadium bronze catalyst said mole ratio of ammonia to p-xylene being from about 2:1 to about 3:1, the mole ratio of oxygen to hydrocarbon being from about 2:1 to about 3:1, and distributing the oxygen throughout the bed by passing said oxygen through spaced-apart inlets along the length of the bed.
Dependencies are inferred from the claim text.