Scott Alden Stevenson

US Patent:

6946422, Sep 20, 2005

Filed:

Dec 12, 2002

Appl. No.:

10/317647

Inventors:

Scott A. Stevenson - Houston TX, US
Wugeng Liang - Katy TX, US

Assignee:

Saudi Basic Industries Corporation - Riyadh

International Classification:

B01J023/00
B01J027/192
B01J021/08
B01J021/12
B01J021/14

US Classification:

502311, 502212, 502248, 502249, 502255, 502305, 502306, 502316, 502317, 502321, 502322

Abstract:

A process for making a catalyst containing oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals, such as tungsten, cobalt, nickel, antimony, magnesium, zinc, phosphorus, potassium, rubidium, thallium, manganese, barium, chromium, boron, sulfur, silicon, aluminum, titanium, cerium, tellurium, tin, vanadium, zirconium, lead, cadmium, copper and niobium wherein metal compounds are dissolved and then precipitated as a catalyst precursor which is calcined to form a mixed metal oxide catalyst. The process of the present invention uses an organic acid, such as acetic acid, instead of nitric acid to dissolve the bismuth compound and, optionally, other metal compounds. The catalyst synthesized by this process may be used for the production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene.

US Patent:

7232788, Jun 19, 2007

Filed:

Mar 14, 2005

Appl. No.:

11/079038

Inventors:

Wugeng Liang - Katy TX, US
Scott A. Stevenson - Houston TX, US
James W. Kauffman - Katy TX, US
John S. Ledford - Mason OH, US
Joseph R. Linzer - Houston TX, US

Assignee:

Saudi Basic Industries Corporation - Riyadh

International Classification:

B01J 23/00
B01J 21/00
B01J 20/00

US Classification:

502311, 502240, 502255, 502263, 502305, 502313, 502314, 502315, 502316, 502321, 502322, 502349, 502350, 502415, 502439

Abstract:

A catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene, contains oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals. The catalyst has a certain relative amount ratio of cesium to bismuth, a certain relative amount ratio of iron to bismuth and a certain relative amount ratio of bismuth, iron, cesium and certain other metals to molybdenum and, optionally, tungsten. For a catalyst of the formula:MoBiWFeCoNiSbCsMgZnPOwherein a is 0. 1 to 1. 5, b is 0 to 4, c is 0. 2 to 5. 0, d is 0 to 9, e is 0 to 9, f is 0 to 2. 0, g is from 0. 4 to 1. 5, h is 0 to 1. 5, i is 0 to 2. 0, j is 0 to 0. 5 and x is determined by the valences of the other components, c:g=3. 3–5. 0, c:a=2. 0–6. 0 and (3a+3c+2d+2e+g+2h+2i)/(2×12+2b)=0. 95–1. 10.

US Patent:

7273829, Sep 25, 2007

Filed:

Dec 22, 2005

Appl. No.:

11/316211

Inventors:

Wugeng Liang - Katy TX, US
Scott A. Stevenson - Houston TX, US
Joseph R. Linzer - Houston TX, US

Assignee:

Saudi Basic Industries Corporation - Riyadh

International Classification:

B01J 23/00

US Classification:

502300, 502240, 502241, 502242, 502243, 502245, 502246, 502247, 502248, 502250, 502263, 502302

Abstract:

The invention is a supported or bound heteropoly acid catalyst composition, a method of making the catalyst composition and a process for the oxidation of saturated and/or unsaturated aldehydes to unsaturated carboxylic acids using the catalyst composition. The catalyst composition has an active heteropoly acid component containing molybdenum, vanadium, phosphorus and cesium and an inert heteropoly acid component containing molybdenum, phosphorus and cesium, potassium, rubidium or sodium at a relative molybdenum:cesium/potassium/rubidium/sodium molar ratio of above about 12:2. The catalyst is made by dissolving compounds of the components of each of the heteropoly acid compounds in a solution, precipitating the heteropoly acid compounds, contacting the heteropoly acid compounds to form a catalyst precursor and calcining the catalyst precursor to form a heteropoly acid compound catalyst. Unsaturated aldehydes, such as methacrolein, may be oxidized in the presence of the heteropoly acid compound catalyst to produce an unsaturated carboxylic acid, such as methacrylic acid.

US Patent:

7501377, Mar 10, 2009

Filed:

May 24, 2007

Appl. No.:

11/805660

Inventors:

Wugeng Liang - Katy TX, US
Scott A. Stevenson - Houston TX, US
James W. Kauffman - Katy TX, US
John S. Ledford - Sugar Land TX, US
Joseph R. Linzer - Issaquah WA, US

Assignee:

Saudi Basic Industries Corporation - Riyadh

International Classification:

B01J 23/00
B01J 21/00
B01J 20/00

US Classification:

502311, 502240, 502255, 502263, 502305, 502313, 502314, 502315, 502316, 502321, 502322, 502349, 502350, 502415, 502439

Abstract:

A catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene, contains oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals. The catalyst has a certain relative amount ratio of cesium to bismuth, a certain relative amount ratio of iron to bismuth and a certain relative amount ratio of bismuth, iron, cesium and certain other metals to molybdenum and, optionally, tungsten. For a catalyst of the formula:MoBiWFeCoNiSbCsMgZnPOwherein a is 0. 1 to 1. 5, b is 0 to 4, c is 0. 2 to 5. 0, d is 0 to 9, e is 0 to 9, f is 0 to 2. 0, g is from 0. 4 to 1. 5, h is 0 to 1. 5, i is 0 to 2. 0, j is 0 to 0. 5 and x is determined by the valences of the other components, c:g=3. 3-5. 0, c:a=2. 0-6. 0 and (3a+3c+2d+2e+g+2h+2i)/(2×12+2b)=0. 95-1. 10.

US Patent:

7649111, Jan 19, 2010

Filed:

Jul 25, 2005

Appl. No.:

11/189116

Inventors:

Wugeng Liang - Katy TX, US
Scott A. Stevenson - Houston TX, US
Angie McGuffey - Sugar Land TX, US
Joseph R. Linzer - Houston TX, US

Assignee:

Saudi Basic Industries Corporation

International Classification:

C07C 51/16
C07C 51/235
B01J 27/00
B01J 27/198
B01J 27/19
B01J 27/192

US Classification:

562531, 562532, 562533, 562535, 502208, 502209, 502211, 502212

Abstract:

A heteropolyacid catalyst for oxidation of isobutyraldehyde, methacrolein or mixtures or combinations thereof to methacrylic acid is disclosed where the heteropolyacid catalyst includes at least molybdenum (Mo), phosphorus (P), vanadium (V), and a first component including bismuth (Bi) and/or boron (B). The heteropolyacid catalyst can also optionally include a second component including potassium (K), rubidium (Rb), cesium (Cs), and/or thallium (Tl) and optionally a third component including antimony (Sb), cerium (Ce), niobium (Nb), indium (In), iron (Fe), chromium (Cr), cobalt (Co), nickel (Ni), manganese (Mn), arsenic (As), silver (Ag), zinc (Zn), germanium (Ge), gallium (Ga), zirconium (Zr), magnesium (Mg), barium (Ba), lead (Pb), tin (Sn), titanium (Ti), aluminum (Al), silicon (Si), tantalum (Ta), tungsten (W), and/or lanthanum (La). The heteropolyacid catalyst can also include an ammonium-containing compound designed to increase a value of medium pores in the final heteropolyacid catalyst. A method for oxidizing isobutanal to methacrylic acid using the heteropolyacid catalyst is also disclosed.

US Patent:

7649112, Jan 19, 2010

Filed:

Jul 25, 2005

Appl. No.:

11/189124

Inventors:

Scott A. Stevenson - Houston TX, US
Wugeng Liang - Katy TX, US

Assignee:

Saudi Basic Industries Corporation

International Classification:

C07C 51/16

US Classification:

562535

Abstract:

An integrated facility is disclosed for simultaneous production of butanal and methacrylic acid products where the facility utilizes a mixed methacrolein and isobutanal stream to make methacrylic acid. The facility is also designed to utilize downstream n-butanal products such as n-butanol and/or 2-ethyl-hexanol to make butyl-methacrylates and 2-ethyl-hexyl-methacrylate. A method is also disclosed which integrates the production of butanal derived products and methacrylic acid derived products.

US Patent:

7732367, Jun 8, 2010

Filed:

Jul 25, 2005

Appl. No.:

11/189095

Inventors:

Scott A. Stevenson - Houston TX, US
Wugeng Liang - Katy TX, US
James W. Kauffman - Katy TX, US
Lixia Cai - Maple Glen PA, US
Angie McGuffey - Sugarland TX, US
Joseph R. Linzer - Houston TX, US

Assignee:

Saudi Basic Industries Corporation

International Classification:

B01J 27/00
B01J 27/198
B01J 27/188
B01J 27/19
B01J 27/192
B01J 27/185
B01J 27/182
B01J 23/00
B01J 23/10
B01J 23/32
B01J 23/02
B01J 23/06
B01J 23/04
C07C 67/00
C07C 51/16
C07C 51/235
C07C 43/30
C07C 43/32

US Classification:

502208, 502209, 502210, 502211, 502212, 502213, 502214, 502300, 502302, 502305, 502324, 502325, 502340, 502344, 502349, 502353, 562535, 568598, 560208

Abstract:

A catalyst for oxidation of unsaturated and/or saturated aldehyde to unsaturated acids is disclosed where the catalyst including at least molybdenum (Mo), phosphorus (P), vanadium (V), bismuth (Bi), and a first component selected from the group consisting of potassium (K), rubidium (Rb), cesium (Cs), thallium (Tl), or mixtures or combinations thereof, where the catalyst has at least 57% medium pores and a nitric acid to molybdenum mole ratio of at least 0. 5:1 or at least 6. 0:1 moles of HNOper mole of Mo. Methods for making and using such catalysts are also disclosed.

US Patent:

7745675, Jun 29, 2010

Filed:

Dec 20, 2006

Appl. No.:

11/642421

Inventors:

Paul E. Ellis - Sugar Land TX, US
Gopalakrishnan G. Juttu - Sugar Land TX, US
Alla K. Khanmamedova - Sugar Land TX, US
Scott F. Mitchell - The Woodlands TX, US
Scott A. Stevenson - Houston TX, US

Assignee:

Saudi Basic Industries Corporation - Riyadh

International Classification:

C07C 2/42
B01J 38/42
B01J 38/44
B01J 38/10

US Classification:

585418, 585419, 585904, 502 35, 502 37, 502 38, 502 53, 502 55

Abstract:

This invention relates to a process for regeneration of a zeolite catalyst, specifically an aluminosilicate zeolite with germanium substituted in the framework for silicon and with platinum deposited on the zeolite. The catalyst may be used in a process for aromatization of alkanes, specifically C-Calkanes. The regeneration process 1) removes coke and sulfur from the catalyst via oxidation, 2) redisperses platinum on the surface of the catalyst via chlorine gas, 3) removes chlorine and bind Pt to the surface of the zeolite by steaming, 4) reduces the catalyst in hydrogen, and 5) optionally, resulfides the catalyst. The zeolite may be a MFI zeolite. The catalyst may be bound with an inert material which does not act as a binding site for platinum during the regeneration process, for example, silica.