The Standard Oil Company

James Frank Brazdil, Jr

Joseph Peter Bartek

Fernando A Cavalcanti

Robert K Grasselli

Joseph P Padolewski

John M Hupp

Mark A Toft

Kenneth P Keckler

Richard P Hauser

Preparation of vanadium antimonate based catalyst using sno2h2o

The invention is a method for the reduction of ammonia breakthrough during the manufacture of acrylonitrile comprising introducing a hydrocarbon selected from the group consisting of propane and isobutane; ammonia and an oxygen-containing gas into a lower portion of a fluid-bed reactor containing an ammoxidation catalyst to react in the presence of said catalyst to produce acrylonitrile. The method comprises introducing into the reactor at least one C,to C,olefin which will react with at least a portion of the unreacted ammonia and oxygen present in the reactor to substantially reduce the amount of ammonia present in the reactor effluent exiting the reactor.

Amelioration of ammonia breakthrough in an alkane ammoxidation process

A process of manufacturing acrylonitrile or methacrylonitrile by the catalytic reaction in the vapor phase of a paraffin selected from propane and isobutane with molecular oxygen and ammonia by catalytic contact of the reactants in a reaction zone with a catalyst, the feed composition having a mole ratio of the paraffin to ammonia in the range of from about 2.5 to 16 and a mole ratio of paraffin to oxygen in the range of from about 1.0 to 10, wherein said catalyst has the elements in the proportions indicated by the empirical formula:

Arsenic promoted vanadium-antimony-oxide based catalyst for selective

Molybdenum promoted vanadium-antimony-oxide based catalyst for selective

A method of preparing a catalyst having the elements and the proportions indicated by the following empirical formula:

Preparation of vanadium antimonate based catalysts using Sno.sub.2

An ammoxidation catalyst characterized by the following empirical formula comprising:

Catalysts for the ammoxidation of alkanes

Preparation of vanadium antimonate based catalysts using SnO.sub.2

A process for the recovery of unreacted ammonia from the reactor effluent obtained from a reaction zone used to produce acrylonitrile or methacrylonitrile comprising quenching the reactor effluent with an aqueous solution of ammonium phosphate wherein the ratio of ammonium ions to phosphate ions in the solution is between about 0.7 to about 1.3, preferably between about 0.9 to 1.2.

Process for recovery and recycle of ammonia from an acrylonitrile

A method of making a promoted vanadium antimony oxide catalyst comprising reacting a monoperoxovanadium ion while in aqueous solution with the antimony compound wherein the improvement comprises adding the antimony compound to the aqueous slurry in at least two steps.

Method for preparing vanadium antimony oxide based oxidation and

The process for the ammoxidation of a C.sub.3 to C.sub.5 paraffinic hydrocarbon to its corresponding .alpha.,.beta.-unsaturated hydrocarbon comprising reacting the C.sub.3 to C.sub.5 paraffinic hydrocarbon with ammonia and oxygen in a fluid bed reactor at a temperature of between 250.degree. C. to 600.degree. C. in the presence of a catalyst having the empirical formula as follows:

Paraffin ammoxidation using vanadium antimony oxide based catalysts with

The process of manufacturing a catalyst having the following empirical formula:

Surface modification and promotion of vanadium antimony oxide catalysts

This invention relates to a process for preparing an attrition resistant vanadium-antimony oxide catalyst by adding to a vanadium-antimony oxide catalyst slurry a lithium compound which upon contact with the aqueous catalyst slurry provides hydroxide, such as lithium hydroxide or lithium carbonate. The process comprises the steps of preparing a catalyst slurry comprising vanadium oxide and antimony oxide, adding the lithium compound to the catalyst slurry, concentrating the catalyst slurry to increase the solids content of the slurry, and drying the catalyst slurry to form attrition resistant particles of catalyst.

Preparation of attrition resistant vanadium-antimony oxide catalysts

A multi-component oxide catalyst comprising zinc and an alkali metal is described which is useful particularly for converting methane and/or natural gas to higher molecular weight hydrocarbon products such as ethane and ethylene. The catalyst is characterized by the formula

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Highland Heights, OH, United States of America

James Frank Brazdil, Jr