Thomas A Singleton

US Patent:

41327349, Jan 2, 1979

Filed:

May 3, 1976

Appl. No.:

5/682232

Inventors:

Thomas C. Singleton - Texas City TX

Assignee:

Monsanto Company - St. Louis MO

International Classification:

C07C 5114

US Classification:

562522

Abstract:

The rate of reaction of ethylenically unsaturated compounds, carbon monoxide and water in the presence of catalyst systems consisting essentially of a rhodium or iridium compound and a halogen promoter to produce carboxylic acids is accelerated by including a minor amount of a compound of cobalt, iron or manganese in the reaction system.

US Patent:

41511077, Apr 24, 1979

Filed:

May 31, 1977

Appl. No.:

5/801954

Inventors:

Thomas C. Singleton - Texas City TX

Assignee:

Monsanto Company - St. Louis MO

International Classification:

C07C 102

US Classification:

252373

Abstract:

The reaction of carbon monoxide and water to produce hydrogen and carbon dioxide is catalyzed by a rhodium or iridium component with an iodide promoter.

US Patent:

40071308, Feb 8, 1977

Filed:

Dec 29, 1975

Appl. No.:

5/644390

Inventors:

Harry S. Leach - Texas City TX
Thomas C. Singleton - Texas City TX
Yu Wen Wei - Houston TX

Assignee:

Monsanto Company - St. Louis MO

International Classification:

B01J 2396

US Classification:

252411R

Abstract:

A method for treating catalyst solution comprising the complex reaction product formed on mixing of a rhodium component or an iridium component and a halogen component in the presence of carbon monoxide to remove metallic corrosion products and recover rhodium or iridium and halogen values therefrom.

US Patent:

40615464, Dec 6, 1977

Filed:

Mar 29, 1976

Appl. No.:

5/671233

Inventors:

Thomas C. Singleton - Texas City TX

Assignee:

Monsanto Company - St. Louis MO

International Classification:

B01D 334

US Classification:

203 31

Abstract:

Formic acid is removed from acetic acid substantially free of halide impurities but containing small amounts of formic acid by contacting the acid with a compound of hexavalent chromium and recovering the purified acid from the resulting mixture by distillation, ion-exchange, or the like. In a preferred embodiment, the acid to be purified is distilled in the presence of a solution of the hexavalent chromium compound, the purified acid being obtained as the overhead product while the bottoms stream contains the reduced chromium compound. With the preferred chromium trioxide as treating agent, this compound can be recovered for re-use by adding a strong mineral acid to the bottoms stream from the distillation, electrolytically oxidizing the chromium compound contained therein, and separating chromium trioxide from the strong mineral acid solution.

US Patent:

44331657, Feb 21, 1984

Filed:

Dec 29, 1980

Appl. No.:

6/221230

Inventors:

Thomas C. Singleton - Texas City TX

Assignee:

Monsanto Company - St. Louis MO

International Classification:

C07C 5110
C07C 5112
C07C 6736
C07C 6737

US Classification:

562519

Abstract:

The present invention provides for an improved process wherein an olefin, an alcohol, or an ester, halide or ether derivative of said alcohol is reacted with carbon monoxide in a liquid phase in the presence of a catalyst system that contains (a) a rhodium component, and (b) an iodine or bromine component. By passing at least a portion of the liquid reaction mass from the reaction zone to a separation zone of substantially lower CO partial pressure, at least a portion of the carbonylation products, as well as unreacted carbon monoxide, inert gases, and unreacted olefin, alcohol, or alcohol derivatives are vaporized and can be withdrawn from the separation zone. Precipitation of the rhodium catalyst under carbon monoxide deficient conditions is prevented or retarded by addition to the system of a stabilizer component selected from N,N,N',N'-tetramethyl-o-phenylenediamine and 2,3'-dipyridyl.

US Patent:

44331665, Feb 21, 1984

Filed:

Dec 29, 1980

Appl. No.:

6/221231

Inventors:

Thomas C. Singleton - Texas City TX
Frank E. Paulik - St. Louis MO

Assignee:

Monsanto Company - St. Louis MO

International Classification:

C07C 5110
C07C 5112
C07C 6736
C07C 6737

US Classification:

562519

Abstract:

The present invention provides for an improved process wherein an olefin, an alcohol, or an ester, halide or ether derivative of said alcohol is reacted with carbon monoxide in a liquid phase in the presence of a catalyst system containing a rhodium component and an iodine or bromine component. By passing at least a portion of the liquid reaction mass from the reaction zone to a separation zone of substantially lower CO partial pressure, at least a portion of the carbonylation products, as well as unreacted carbon monoxide, inert gases, and unreacted olefin, alcohol, or alcohol derivatives are vaporized and can be withdrawn from the separation zone. Precipitation of the rhodium catalyst under carbon monoxide deficient conditions is prevented or retarded by addition to the system of a stabilizer which is a tin component which may be tin or a tin compound.