John Nathan Shultz

US Patent:

52568105, Oct 26, 1993

Filed:

Oct 14, 1992

Appl. No.:

7/960653

Inventors:

Steven J. Rowe - Medina OH
John T. Shultz - Medina OH
Robert J. Mack - Elida OH
Susan L. Dio - Port Lavaca TX

Assignee:

The Standard Oil Company - Cleveland OH

International Classification:

C07C25326

US Classification:

558320

Abstract:

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.

US Patent:

53268865, Jul 5, 1994

Filed:

Dec 9, 1991

Appl. No.:

7/803947

Inventors:

John T. Shultz - Medina OH

Assignee:

The Standard Oil Company - Cleveland OH

International Classification:

C07D30760

US Classification:

549259

Abstract:

Catalysts comprising a compound of vanadium, phosphorus and oxygen which are employed in the oxidation of n-butane to maleic anhydride are protected from contamination caused by side reactions which occur between the catalyst and steel process equipment by covering the process equipment surfaces which contact the catalyst at elevated temperatures with a coating comprising aluminum oxide.