Rathin Datta

US Patent:

6464880, Oct 15, 2002

Filed:

Sep 19, 2000

Appl. No.:

09/664838

Inventors:

Rathin Datta - Chicago IL
Shih-Perng Tsai - Naperville IL
Michael P. Henry - Batavia IL

Assignee:

University of Chicago - Chicago IL

International Classification:

B01D 6100

US Classification:

210651, 210638, 21050027, 21050036, 264 41, 264154, 156 43

Abstract:

A method is provided for producing porous hydrophilic materials whereby nonporous materials are subjected to ester hydrolysis to generate site-specific perforations. Processes for separating aqueous phase from organic and aqueous mixtures utilizing the invented materials also are provided.

US Patent:

6495014, Dec 17, 2002

Filed:

Jul 12, 2001

Appl. No.:

09/806683

Inventors:

Rathin Datta - Chicago IL
YuPo Lin - Westmont IL
Dennis Burke - Roscoe IL
Shih-Perng Tsai - Naperville IL

Assignee:

University of Chicago - Chicago IL

International Classification:

C25C 700

US Classification:

204533, 204252, 204524, 204536, 204633, 204634, 521 28, 210290

Abstract:

A porous immobilized ion-exchange material is provided. Also provided is an electrodeionization device incorporating the material. A method for subjecting a fluid to electrodeionization, is provided utilizing porous immobilized ion-exchange material. A salient feature of the material is that it can be regenerated in situ.

US Patent:

6797684, Sep 28, 2004

Filed:

Mar 11, 2002

Appl. No.:

10/095596

Inventors:

Mark Henneberry - El Paso IL
Joshua A. Snively - Winter Haven FL
Gerald J. Vasek - Westmont IL
Rathin Datta - Chicago IL

Assignee:

Vertec Biosolvents, Inc. - Downers Grove IL
Florida Chemical Co., Inc. - Winter Haven FL

International Classification:

C11D 1700

US Classification:

510417, 510365, 510505

Abstract:

A solvent that is biodegradable, provides effective solvency for a broad range of tasks and is generally benign to human health is disclosed. This solvent is a mixture of a lactate ester and d-limonene.

US Patent:

6890893, May 10, 2005

Filed:

Aug 14, 2002

Appl. No.:

10/218922

Inventors:

Rathin Datta - Chicago IL, US

Assignee:

Vertec BioSolvents, Inc. - Downers Grove IL

International Classification:

C11D007/50
C11D007/26

US Classification:

510407, 510174, 510212, 510245, 510365, 510417, 510505, 510506, 134 38

Abstract:

A solvent composition that comprises a C-Clactate ester and an odor-reducing amount of a tertiary amine having a boiling point at one atmosphere of about 80 C. to about 160 C. is disclosed. The composition (a) is substantially free of odor due to the tertiary amine, (b) exhibits a reduced amount of odor due to the lactate ester as compared to the same composition without the tertiary amine, and (c) is a homogeneous liquid or gel at zero degrees Celsius. A method of reducing the odor of a lactate ester-based solvent is also disclosed.

US Patent:

6933381, Aug 23, 2005

Filed:

Feb 2, 2001

Appl. No.:

09/775760

Inventors:

Charles B. Mallon - Belle Mead NJ, US
John S. Vames - Highland Park NJ, US
John I. Sarlis - Laval, Quebec, CA
Benito See - Belle Mead NJ, US
David M. Trampe - Somerville NJ, US
Rathin Datta - Chicago IL, US

International Classification:

C08B011/00
C08B011/12

US Classification:

536124, 536 56, 536 84, 536127, 5361231, 536 91, 536 30, 536 43, 536 90, 536 99, 536 44, 536 553, 536120, 536 57, 424488

Abstract:

Process for the production of polysaccharide ethers, e. g. cellulose ethers, are disclosed wherein salts formed during the process, e. g. , sodium nitrate or sodium acetate, are converted to their corresponding acids and bases by means of an electric current, preferably in combination with a bipolar membrane and suitable catiion and/or anion membranes. The acids and bases recovered from the process can be recycled, thereby avoiding the need to provide for disposal of salts.

US Patent:

7754104, Jul 13, 2010

Filed:

Jul 23, 2007

Appl. No.:

11/781450

Inventors:

Rathin Datta - Chicago IL, US
James E. Opre - Downers Grove IL, US

Assignee:

Vertec Biosolvent, Inc. - Mt. Prospect IL

International Classification:

C23G 5/00

US Classification:

252364, 510108, 510210, 510405, 510417

Abstract:

A solvent composition of about 90 to about 10 percent by weight C-Clactate ester and about 10 to about 90 percent by weight C-Caliphatic alcohol with low odor and enhanced performance properties is disclosed. This composition can also be mixed with other solvents and continue to provide the low odor and enhanced performance properties.

US Patent:

7923227, Apr 12, 2011

Filed:

Oct 6, 2009

Appl. No.:

12/574499

Inventors:

Robert Hickey - Okemos MI, US
Rahul Basu - Naperville IL, US
Rathin Datta - Chicago IL, US
Shih-Perng Tsai - Naperville IL, US

Assignee:

Coskata, Inc. - Warrenville IL

International Classification:

C12P 7/06

US Classification:

435161, 435 41, 435136, 435157, 4352971, 4352972, 4352973, 4352974

Abstract:

A stable system for producing liquid products such as ethanol, butanol and other chemicals from syngas components contacts CO or a mixture of COand Hwith a hydrophilic membrane under anaerobic conditions and transfers these components into contact with microorganisms contained as a biofilm on the membrane. Maintaining the microorganisms as a biolayer on the surface of the membrane facilitates cleaning of the membrane surface that retains the biofilm. In addition the shell gas space that surrounds the membranes may be flooded to reduce or remove the biofilm. Agitation of the liquid, by for example the bubbling of gas in the surrounding shell space, can fully or partially remove the biofilm from the membrane.

US Patent:

8017384, Sep 13, 2011

Filed:

Apr 29, 2008

Appl. No.:

12/111734

Inventors:

Shih-Perng Tsai - Naperville IL, US
Rathin Datta - Chicago IL, US
Rahul Basu - Naperville IL, US
Seong-Hoon Yoon - Naperville IL, US
Richard E. Tobey - St. Charles IL, US

Assignee:

Caliper Life Sciences, Inc. - Mountain View CA

International Classification:

C12M 1/12

US Classification:

4352974, 4352891, 4352971, 4352972, 4352973, 4352975

Abstract:

A modular membrane supported bioreactor for anaerobic conversion of gas into liquid products including membrane module(s) having a plurality of hollow fibers packed across a cross sectional area of the membrane module in a direction transverse to the axis of the membrane module; a membrane vessel for retaining the membrane module(s) at least partially submerged in a process liquid and isolated from ambient atmosphere; and a gas supply conduit operably connected to the hollow fibers for supplying a process gas to the hollow fiber lumens. The gas supply conduit enables the formation of a biofilm on the outer surface of the hollow fiber wall by interaction of microorganisms with the process gas and the production of a liquid product that mixes with the process liquid.