The Standard Oil Company

Steven J Rowe

Wilfrid G Shaw

Dev D Suresh

Michael J Seely

Maria Strada Friedrich

Louis R Trott

Edward J Sockell

Kenneth P Keckler

Albert R Shuki

Vincent G Reiling

Kenneth L Bigler

Steve J Miko

Frank John Kocjancic

John T Shultz

Paul E Bott

Susan L Dio

Robert J Mack

A process for the substantial or complete elimination of ammonium sulfate generated during the production of acrylonitrile by the direct ammoxidation of propylene/propane, ammonia and an oxygen containing gas (e.g. air) over a fluid bed catalyst wherein the improvement comprises introducing methanol into said reactor in the upper portion of the reactor at a location where the methanol reacts with at least a portion if not substantially all of the excess ammonia without affecting the acrylonitrile yield. Preferably, methanol is introduced into the reactor at below its coking temperature. In particular, when an oxygen lean fluid bed catalyst is utilized, an additional oxygen containing gas is introduced into the reaction at a distance between about 8 to 14 inches from the methanol feed location.

Process for elimination of waste material during manufacture of

An improved process for substantially eliminating, preferably completely eliminating of nitride formation on feed conduits for fluid bed catalyst reactors used in the manufacture of unsaturated nitriles from corresponding olefins, NH.sub.3 and oxygen comprising maintaining the temperature of the ammonia inside the conduit below its dissociation temperature and/or maintaining the temperature of the inside surface of the conduit below the temperature at which any monoatomic nitrogen can react with the conduit to form a nitride.

Method for eliminating nitriding during acrylonitrile production

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Medina, OH, United States of America

Steven J Rowe