Stephen E Fitzpatrick

US Patent:

8138371, Mar 20, 2012

Filed:

Mar 11, 2009

Appl. No.:

12/401987

Inventors:

Stephen W. Fitzpatrick - Framingham MA, US

Assignee:

Biofine Technologies LLC - Framingham MA

International Classification:

C07C 51/00
C07C 53/00

US Classification:

562515, 562609

Abstract:

Processes for producing formic acid from a carbohydrate-containing material include hydrolyzing a carbohydrate-containing material (e. g. , cellulose) in the presence of a mineral acid to form an intermediate hydrolysate comprising one or more sugars, and hydrolyzing the intermediate hydrolysate to form a hydrolysate product including formic acid.

US Patent:

20120172625, Jul 5, 2012

Filed:

Mar 16, 2012

Appl. No.:

13/422528

Inventors:

Stephen W. Fitzpatrick - Framingham MA, US

International Classification:

C07C 51/00

US Classification:

562515

Abstract:

Processes for producing formic acid from a carbohydrate-containing material include hydrolyzing a carbohydrate-containing material (e.g., cellulose) in the presence of a mineral acid to form an intermediate hydrolysate comprising one or more sugars, and hydrolyzing the intermediate hydrolysate to form a hydrolysate product including formic acid.

US Patent:

57868980, Jul 28, 1998

Filed:

Aug 23, 1996

Appl. No.:

8/697435

Inventors:

Stephen T. Fitzpatrick - Gorham ME

International Classification:

G01N 2184
G01N 930
B04B 1500

US Classification:

356426

Abstract:

A method and structure for analysis of the size and/or distribution of low-density particles by centrifugal sedimentation in a centrifuge chamber containing a fluid where the particles to be tested are delivered to the bottom of the centrifuge chamber and allowed to float upwards in the higher density fluid within the centrifuge chamber to be analyzed.

US Patent:

48974978, Jan 30, 1990

Filed:

Apr 26, 1988

Appl. No.:

7/186234

Inventors:

Stephen W. Fitzpatrick - Framingham MA

Assignee:

Biofine Incorporated - Wilmington DE

International Classification:

C07D30748
C07D30750

US Classification:

549489

Abstract:

A process for producing furfural and levulinic acid from lignocellulose includes subjecting a sample of lignocellulose to acid degradation at an elevated temperature for a minute or less, during which time at least fifty percent of the furfural that theoretically can be derived from the sample is generated. The resulting mixture is then subjected to a second acid degradation at an elevated temperature to produce levulinic acid. During the second acid degradation, furfural vapors are continuously collected from the mixture.

US Patent:

56081057, Mar 4, 1997

Filed:

Jun 7, 1995

Appl. No.:

8/475630

Inventors:

Stephen W. Fitzpatrick - Framingham MA

Assignee:

Biofine Incorporated - Wilmington DE

International Classification:

C07C 5100
C07C30748

US Classification:

562515

Abstract:

A continuous process for producing levulinic acid from carbohydrate-containing materials in high yields is described. According to the process, a carbohydrate-containing material is supplied continuously to a first reactor and hydrolyzed at between 210. degree. C. and 230. degree. C. for between 13 seconds and 25 seconds in the presence of between 1% and 5% by weight mineral acid. The hydrolysis produces hydroxymethylfurfural, which is removed continuously from the first reactor and supplied continuously to a second reactor. In the second reactor, the hydroxymethylfurfural is hydrolyzed further at between 195. degree. C. and 215. degree. C. for between 15 minutes and 30 minutes to produce levulinic acid, which is continuously removed from the second reactor. The levulinic acid preferably is produced in at least 60%, and more preferably at least 70%, of the theoretical yield based on the hexose content of the carbohydrate-containing material.

US Patent:

20140323759, Oct 30, 2014

Filed:

Jun 30, 2014

Appl. No.:

14/319932

Inventors:

Stephen W. Fitzpatrick - Framingham MA, US

International Classification:

C07C 51/00

US Classification:

562515

Abstract:

Processes for producing formic acid from a carbohydrate-containing material include hydrolyzing a carbohydrate-containing material (e.g., cellulose) in the presence of a mineral acid to form an intermediate hydrolysate comprising one or more sugars, and hydrolyzing the intermediate hydrolysate to form a hydrolysate product including formic acid.