Sun Ventures, Inc.

Suntech, Inc.

Ronald D Bushick

Howard P Angstadt

Richard V Norton

Jack D Tinkler

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.

Ammoxidation process

In the process of making dicyanonaphthalene by reacting a di-lower alkylnaphthalene, ammonia and oxygen under ammoxidation conditions, the improvement which comprises carrying out said ammoxidation in the presence of a supported alkali-metal vanadium bronze catalyst, promoted with iron and with a molar ratio of ammonia to dialkylnaphthalene of from at least about 10:1 to about 30:1. The invention also embodies the iron promoted catalyst.

Ammoxidation catalyst

An ammoxidation process for the preparation of nitriles by reaction of m- or p-xylene with ammonia and oxygen using as catalyst an .alpha.-alumina supported vanadiumalkali metal bronze promoted with niobium, whereby a high proportion of dinitrile product is obtained. The invention also embodies the niobium promoted catalyst.

Ammoxidation process for making dicyanonaphthalene

An ammoxidation process for preparing nitriles from m- and p-xylene whereby the formation of carbon oxides is held to a minimum which comprises reacting the xylene and ammonia at a temperature of from about 375.degree.C. to about 500.degree.C. and in the presence of added oxygen, the molar ratio of ammonia to xylene being about 3:1 or less, the molar ratio of oxygen to xylene being about 3:1 or less, the volume percent concentration of the feed being preferably about 3% to 10% hydrocarbon, 7% to 20% ammonia, and 10% to 20% oxygen, and the catalyst for said reaction comprising at least about 1 to 10% by weight of a vanadium bronze supported on .alpha.-alumina.

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Glen Mills, PA, United States of America

Ronald D Bushick