Michael J Mummey, 7230218 Aldine Westfield Rd, Spring, TX 77386

2013021, Aug 22, 2013

Aug 24, 2011

13/821050

Zhiping Shan - The Woodlands TX, US
Michael J. Mummey - Spring TX, US
William S. Frazee - Spring TX, US
Bennie A. Horrell - Spring TX, US

HUNTSMAN PETROCHEMICAL LLC - The Woodlands TX

B01J 27/198
C07D 307/60

549260, 502209, 423305, 549259

An oxidation catalyst comprising vanadium, phosphorus, and oxygen having average vanadium valence less than about 4.10, and a method of preparing such catalyst, is provided. The catalyst has side crush strength of at least about 5 lbs. and improved yield of maleic anhydride from n-butane between about 1% and about 6% absolute. The catalyst is formed by exposing a conventional active VPO catalyst having average vanadium valence between about 4.10 and about 4.40 to an organic solvent having a dielectric constant between about 5 and about 55 under conditions that facilitate an oxidation-reduction reaction, reducing the valence of the vanadium below 4.10.

5641722, Jun 24, 1997

Sep 15, 1994

8/306489

Scott F. Mitchell - St. Charles MO
Robert A. Keppel - Chesterfield MO
Michael J. Mummey - Foley MO

Huntsman Petrochemical Corporation - Salt Lake City UT

B01J 27198

502209

An activated porous phosphorus/vanadium oxide catalyst adapted for the catalytic oxidation of a hydrocarbon to produce a carboxylic acid anhydride. The catalyst comprises a shaped body having a volume of at least about 0. 02 cc, a phosphorus content of between about 1. 05 and about 1. 20, a B. E. T. surface area of at least about 15 m. sup. 2 /g, an average vanadium oxidation state of between about 4. 06 and about 4. 3, a total pore volume of at least about 0. 15 cc/g, a normalized apparent shaped body density of between about 1. 0 and about 2. 0 g/cc, and a crush strength of at least about 4 pounds. At least about 20% of the pore volume of the catalyst is constituted of pores having a diameter between about 0. 1 and about 3. 3. mu. M, and at least about 40% of the pore volume is constituted of pores having a diameter of less than about 0. 1. mu. M.

5773382, Jun 30, 1998

Jan 3, 1997

8/775938

Scott F. Mitchell - St. Charles MO
Robert A. Keppel - Chesterfield MO
Michael J. Mummey - Foley MO

Huntsman Petrochemical Corporation - Austin TX

B01J 27198

502209

An activated porous phosphorus/vanadium oxide catalyst adapted for the catalytic oxidation of a hydrocarbon to produce a carboxylic acid anhydride. The catalyst comprises a shaped body having a volume of at least about 0. 02 cc, a phosphorus content of between about 1. 05 and about 1. 20, a B. E. T. surface area of at least about 15 m. sup. 2 /g, an average vanadium oxidation state of between about 4. 06 and about 4. 3, a total pore volume of at least about 0. 15 cc/g, a normalized apparent shaped body density of between about 1. 0 and about 2. 0 g/cc, and a crush strength of at least about 4 pounds. At least about 20% of the pore volume of the catalyst is constituted of pores having a diameter between about 0. 1 and about 3. 3. mu. M, and at least about 40% of the pore volume is constituted of pores having a diameter of less than about 0. 1. mu. M.

6046343, Apr 4, 2000

Feb 25, 1999

9/257633

Michael J. Mummey - Austin TX
Robert A. Keppel - Chesterfield MO
A. Lamar Reeves - Gonzalez FL

Huntsman Petrochemical Corporation - Austin TX

C07D30734

549259

Improved methods and apparatus for manufacture of maleic anhydride by catalytic oxidation of n-butane or other hydrocarbon having four carbon atoms in a straight chain over a fixed catalyst bed comprising a phosphorus vanadium oxide catalyst. Movement of catalyst bodies with respect to each other and with respect to the walls of the reaction chamber is restrained so as to prevent the catalyst bodies from abrading against each other or the reactor chamber walls in a manner that would cause formation of catalyst fines. Methods and apparatus are also provided for removal of fines from a fixed catalyst bed. The methods of the invention are effective to prevent loss of catalyst from a tubular reactor, and to control degradation of solvent absorbent in a process in which maleic anhydride is separated from the reaction gas by absorption into such a solvent.

4855459, Aug 8, 1989

Jan 19, 1988

7/145795

Michael J. Mummey - Foley MO

Monsanto Company - St. Louis MO

C07D30760

549260

Maleic anhydride is produced by the catalytic vapor phase partial oxidation of a nonaromatic hydrocarbon having at least four carbon atoms in a straight chain with molecular oxygen or a molecular oxygen-containing gas in the presence of phosphorus-vanadium mixed oxide oxidation catalyst. The catalyst is diluted with an inert solid material in an amount sufficient to form a catalyst-inert solid material composition effective to stabilize the maleic anhydride yield such that the average yield decay is less than 0. 30% of the established initial maleic anhydride yield per month over an extended period of sustained operations.

5877331, Mar 2, 1999

Nov 12, 1997

8/968172

Michael J. Mummey - Austin TX
Robert A. Keppel - Chesterfield MI
A. Lamar Reeves - Gonzalez FL

Huntsman Petrochemical Corporation - Austin TX

C07D30760

549259

Improved methods and apparatus for manufacture of maleic anhydride by catalytic oxidation of n-butane or other hydrocarbon having four carbon atoms in a straight chain over a fixed catalyst bed comprising a phosphorus vanadium oxide catalyst. Movement of catalyst bodies with respect to each other and with respect to the walls of the reaction chamber is restrained so as to prevent the catalyst bodies from abrading against each other or the reactor chamber walls in a manner that would cause formation of catalyst fines. Methods and apparatus are also provided for removal of fines from a fixed catalyst bed. The methods of the invention are effective to prevent loss of catalyst from a tubular reactor, and to control degradation of solvent absorbent in a process in which maleic anhydride is separated from the reaction gas by absorption into such a solvent.

5734066, Mar 31, 1998

Feb 13, 1992

7/835152

Robert A. Keppel - Chesterfield MO
Scott F. Mitchell - St. Charles MO
Michael J. Mummey - Foley MO

Huntsman Petrochemical Corporation - Austin TX

C07D30760

549259

An improved process for the manufacture of maleic anhydride by catalytic oxidation of n-butane in which the feed flow channel to the catalytic reactor contains an autoignition suppression agent containing acid sites or trivalent phosphorus as an ignition inhibiting component. The autoignition suppression agent may also be used in other gas/liquid containment envelopes for flammable mixtures of hydrocarbons and oxygen. A novel apparatus and method are disclosed for assessing the influence of system conditions on autoignition of hydrocarbon/oxygen mixtures.