Mark D Paster

US Patent:

6573409, Jun 3, 2003

Filed:

May 19, 2000

Appl. No.:

09/575107

Inventors:

Jerry R. Ebner - St. Charles MO
Zhi Guo - Chicago IL
Arnold Hershman - St. Louis MO
Loraine M. Klein - Streamwood IL
William D. McGhee - Fenton MO
Mark D. Paster - Chesterfield MO
Indra Prakash - Hoffman Estates IL

Assignee:

The Nutrasweet Company - Mt. Prospect IL

International Classification:

C07C 4500

US Classification:

568449, 568450, 568471, 568850

Abstract:

3,3-Dimethylbutanal is prepared from 3,3-dimethylbutanol. Intermediate 3,3-dimethylbutanol is obtained by reacting ethylene, isopropylene and sulfuric acid to produce a 3,3-dimethylbutyl ester which is hydrolyzed to the alcohol. The hvdrolysis step is effectively carried out by reactive distillation. Alternatively, 3,3-dimethylbutanal is prepared from 3,3-dimethylbutanol obtained by reduction of the corresponding carboxylic acid or 1,2-epoxy-3,3-dimethylbutane, or by hydrolysis of 1-halo-3,3-dimethylbutane. Fixed bed gas phase and stirred tank liquid phase processes are provided for converting 3,3-dimethylbutanol to 3,3-dimethylbutanal by catalytic dehydrogenation.

US Patent:

6803487, Oct 12, 2004

Filed:

May 29, 2003

Appl. No.:

10/447815

Inventors:

Jerry R. Ebner - St. Charles MO
Zhi Guo - Chicago IL
Arnold Hershman - St. Louis MO
Loraine M. Klein - Streamwood IL
William D. McGhee - Fenton MO
Mark Paster - Chesterfield MO
Indra Prakash - Hoffman Estates IL

Assignee:

The Nutrasweet Company - Mt. Prospect IL

International Classification:

C07C 4529

US Classification:

568449, 450471, 450840

Abstract:

3,3-Dimethylbutanal is prepared from 3,3-dimethylbutanol. Intermediate 3,3-dimethylbutanol is obtained by reacting ethylene, isopropylene and a mineral acid to produce a 3,3-dimethylbutyl ester which is hydrolyzed to the alcohol. The hydrolysis step is effectively carried out by reactive distillation. Alternatively, 3,3-dimethylbutanal is prepared from 3,3-dimethylbutanol obtained by reduction of the corresponding carboxylic acid or 1,2-epoxy-3,3-dimethylbutane, or by hydrolysis of 1-halo-3,3-dimethylbutane. Fixed bed gas phase and stirred tank liquid phase processes are provided for converting 3,3-dimethylbutanol to 3,3-dimethylbutanal by catalytic dehydrogenation.

US Patent:

7164049, Jan 16, 2007

Filed:

Mar 27, 2003

Appl. No.:

10/400558

Inventors:

Jerry R. Ebner - St. Charles MO, US
Zhi Guo - Chicago IL, US
Arnold Hershman - St. Louis MO, US
Loraine M. Klein - Streamwood IL, US
William D. McGhee - Fenton MO, US
Mark Paster - Chesterfield MO, US
Indra Prakash - Hoffman Estates IL, US

Assignee:

The Nutrasweet Company - Norwalk CT

International Classification:

C07C 27/00

US Classification:

568876, 568877

Abstract:

3,3-Dimethylbutanal is prepared from 3,3-dimethylbutanol. Intermediate 3,3-dimethylbutanol is obtained by reacting ethylene, isopropylene and a mineral acid to produce a 3,3-dimethylbutyl ester which is hydrolyzed to the alcohol. The hydrolysis step is effectively carried out by reactive distillation. Alternatively, 3,3-dimethylbutanal is prepared from 3,3-dimethylbutanol obtained by reduction of the corresponding carboxylic acid or 1,2-epoxy-3,3-dimethylbutane, or by hydrolysis of 1-halo-3,3-dimethylbutane. Fixed bed gas phase and stirred tank liquid phase processes are provided for converting 3,3-dimethylbutanol to 3,3-dimethylbutanal by catalytic dehydrogenation.

US Patent:

7348459, Mar 25, 2008

Filed:

Oct 24, 2006

Appl. No.:

11/552395

Inventors:

Jerry R. Ebner - St. Charles MO, US
Zhi Guo - Chicago IL, US
Arnold Hershman - St. Louis MO, US
Loraine M. Klein - Streamwood IL, US
William D. McGhee - Fenton MO, US
Mark D. Paster - Chesterfield MO, US
Indra Prakash - Hoffman Estates IL, US

Assignee:

The Nutrasweet Company - Mt. Prospect IL

International Classification:

C07C 45/29

US Classification:

568449, 568450

Abstract:

3,3-Dimethylbutanal is prepared from 3,3-dimethybutanol. Intermediate 3,3-dimethylbutanol is obtained by reacting ethylene, isopropylene and a mineral acid to produce a 3,3-dimethylbutyl ester which is hydrolyzed to the alcohol. The hydrolysis step is effectively carried out by reactive distillation. Alternatively, 3,3-dimethylbutanal is prepared from 3,3-dimethylbutanol obtained by reduction of the corresponding carboxylic acid or 1,2-epoxy-3,3-dimethylbutane, or by hydrolysis of 1-halo-3,3-dimethylbutane. Fixed bed gas phase and stirred tank liquid phase processes are provided for converted 3,3-dimethylbutanol to 3,3-dimethylbutanal by catalytic dehydrogenation.

US Patent:

60874716, Jul 11, 2000

Filed:

Apr 14, 1998

Appl. No.:

9/060120

Inventors:

Devdatt L. Kurdikar - Maryland Heights MO
Fred E. Strauser - St. Charles MO
A. John Solodar - University City MO
Mark D. Paster - Chesterfield MO

Assignee:

Monsanto Company - St. Louis MO

International Classification:

C08F 600

US Classification:

528480

Abstract:

Polyhydroxyalkanoate (PHA) polyester is extracted from biomass by dissolving the PHA in a non-halogenated solvent which comprises a PHA-poor solvent that dissolves less than 1% of the PHA at temperatures less than the solvent boiling point, or a mixture of a PHA-poor solvent and a PHA-good solvent. Following extraction of PHA under pressure at a temperature above about 80. degree. C. , typically above the boiling point of the PHA-poor solvent, PHA polymer is precipitated by cooling the PHA-enriched solvent mixture. Suitable PHA-poor solvents can include linear and branched R. sub. 1 --OH alcohols and R. sub. 2 --COOR. sub. 3 esters where R. sub. 1 =C. sub. 1 -C. sub. 4, R. sub. 2 =H, C. sub. 1,C. sub. 2, or C. sub. 3, and R. sub. 3 =C. sub. 1 -C. sub. 5.

US Patent:

54516978, Sep 19, 1995

Filed:

Dec 27, 1993

Appl. No.:

8/173010

Inventors:

William D. McGhee - Bridgeton MO
Mark D. Paster - Chesterfield MO
Dennis P. Riley - Ballwin MO
Kenneth W. Ruettimann - St. Louis MO
A. John Solodar - University City MO
Thomas E. Waldman - Chesterfield MO

Assignee:

Monsanto Company - St. Louis MO

International Classification:

C07C26304

US Classification:

560345

Abstract:

A process for preparing isocyanates comprising contacting carbon dioxide and a primary amine in the presence of an aprotic organic solvent and a base selected from the group consisting of a phosphazene compound, an organic, nitrogenous base and mixtures thereof, wherein the organic, nitrogenous base selected from the group consisting of guanidine compounds, amidine compounds, tertiary amines and mixtures thereof to produce the corresponding ammonium carbamate salt, reacting the ammonium carbamate salt with an anhydride dehydrating agent to produce a product stream comprising the corresponding isocyanate, the aprotic organic solvent and the base salt derived from the anhydride, separating the base salt from the product stream, recovering and recycling the base, and regenerating and recycling the anhydride dehydrating agent.

US Patent:

6043063, Mar 28, 2000

Filed:

Apr 14, 1998

Appl. No.:

9/060121

Inventors:

Devdatt L. Kurdikar - Maryland Heights MO
Fred E. Strauser - St. Charles MO
A. John Solodar - University City MO
Mark D. Paster - Chesterfield MO
Jawed Asrar - Chesterfield MO

Assignee:

Monsanto Company - St. Louis MO

International Classification:

C12P 742
C12P 762
C12N 120
C08G 6306

US Classification:

435135

Abstract:

Polyhydroxyalkanoate (PHA) polyester is extracted from biomass by dissolving the PHA in a non-halogenated solvent which comprises a PHA-good solvent or a mixture thereof. Suitable PHA-good solvents can be selected from the disclosed alcohols, esters, amides and ketones. The PHA can be recovered, for example, by cooling, by solvent evaporation, or by addition of a PHA-poor solvent, wherein the PHA-poor solvent preferably dissolves less than about 1% (w/v) of the PHA at a temperature below the solvent boiling point. Preferred PHA types for use in the invention are poly (hydroxybutyrate-co-hydroxyvalerate), poly(3-hydroxybutyrate-co-4-hydroxybutyrate), and polymers/copolymers of hydroxyterminated polyhydroxybutyrate.