Bin Chen

US Patent:

6372879, Apr 16, 2002

Filed:

Jun 29, 2001

Appl. No.:

09/895990

Inventors:

Conor M. Dowling - Blue Bell PA
Bin Chen - Wayne PA
Sri R. Seshadri - Holland PA

Assignee:

ATOFINA Chemicals, Inc. - Philadelphia PA

International Classification:

C08G 6302

US Classification:

528279, 528275, 528285, 5283081, 5283083, 502103, 502113, 502118, 502161, 502170

Abstract:

The present invention is based upon the discovery that nontitanyl oxalates can enhance the catalytic functionality of titanyl oxalate catalysts. This invention provides a novel catalytic composition containing a titanyl oxalate catalyst and a metallic oxalate catalyst enhancer and optionally containing a metallic cocatalyst such as an antimony based catalyst. A synergistic relationship has been discovered between titanyl oxalate catalyst and the catalyst enhancer. A synergistic relationship has also been discovered between the titanyl oxalate catalyst, catalyst enhancer and a metallic cocatalyst such as antimony oxide or antimony triacetate. Also provided is an improved process of producing polyester by the polycondensation of polyester forming reactants in the presence of a catalytically effective amount of a polycondensation catalyst, wherein the improvement comprises utilizing, as the polycondensation catalyst, the novel catalyst composition containing a titanyl oxalate such as lithium titanyl oxalate and a catalyst enhancer such as a nontitanyl metallic oxalate like lithium oxalate and optionally containing a metallic catalyst such as antimony oxide or antimony triacetate. The improved process produces an improved polyester having lower acetaldehyde numbers and good color. The titanyl oxalate/catalyst enhancer composition can be used as a polycondensation catalyst in combination with other catalysts to achieve synergistic catalytic activity.

US Patent:

6528691, Mar 4, 2003

Filed:

May 14, 1999

Appl. No.:

09/312267

Inventors:

Maher Y. Elsheikh - Tredyffrin PA
Bin Chen - Tredyffrin PA

Assignee:

Atofina Chemicals, Inc. - Philadelphia PA

International Classification:

C07C 1708

US Classification:

570167

Abstract:

A gas phase process for the preparation of 245fa is provided, wherein 1233zd is contacted with HF in the presence of a supported antimony catalyst.

US Patent:

7590517, Sep 15, 2009

Filed:

May 28, 2003

Appl. No.:

10/446171

Inventors:

Robert Doerksen - Philadelphia PA, US
Bin Chen - Baton Rouge LA, US
William F. DeGrado - Media PA, US
Michael L. Klein - Ocean City NJ, US

Assignee:

The Trustees of the University of Pennsylvania - Philadelphia PA

International Classification:

G06G 7/48

US Classification:

703 11

Abstract:

Methods, systems, and computer program products for computational polymer processing including, without limitation, computational amphiphilic polymer design, conformational energy minimization, generation and refinement of torsional parameters for sub-units of potential polymers, generation of modified force field parameters, and prediction of conformational information for potential polymers. A target polymer backbone or portion thereof is identified. Small model compounds that have structural connectivities that are similar to structural connectivities of the target polymer backbone or portion thereof, are identified, whereby the combination of the small model compounds serve as a model of the target polymer or portion thereof. Gradient-corrected density functional theory (“DFT”) torsional potentials are calculated for the small model compounds, wherein energies are calculated at unconstrained and constrained geometries of the selected small model compounds. New torsional parameters are then obtained from the DFT torsional potentials.

US Patent:

20020183569, Dec 5, 2002

Filed:

Jul 26, 2002

Appl. No.:

10/206688

Inventors:

Michael Bolmer - Lower Providence PA, US
Bin Chen - Tredyffrin PA, US
Maher Elsheikh - Tredyffrin PA, US

International Classification:

C07C017/00
C07C019/08

US Classification:

570/165000

Abstract:

A process for the preparation of 142 is provided, wherein 140 is fluorinated in the gas phase with HF in the presence of a fluorination catalyst. 142 is a known foam blowing agent.

US Patent:

20050187374, Aug 25, 2005

Filed:

Feb 20, 2004

Appl. No.:

10/783485

Inventors:

Bin Chen - Wayne PA, US
Conor Dowling - Blue Bell PA, US
Sri Seshadri - Holland PA, US

International Classification:

C08G063/78

US Classification:

528275000

Abstract:

A catalyst composition for preparing polyesters comprises a titanium compound and one or more catalyst enhancers. The titanium compound may be either a titanyl compound of the formula XTiOYor a titanium salt of the formula XTiY, where each X is independently selected from the group consisting of H, Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba and ammonium; m=0, 1 or 2; Y is a ligand of the formula CHO, wherein a=1 to 30, b=0 to 60, and c=1 to 10; and o=2, 3, or 4. The catalyst enhancer may be selected from either or both of two classes: 1) compounds selected from the group consisting of oxalate and C1-C26 carboxylate salts of Li, Na, K, Rb, Cs, Be, Ca, Mg, Sr, and Ba; and 2) compounds selected from the group consisting of soluble compounds of Al, Co, Zn, and Sn.

US Patent:

60749857, Jun 13, 2000

Filed:

Aug 3, 1999

Appl. No.:

9/369307

Inventors:

Maher Y. Elsheikh - Tredyffrin PA
Bin Chen - Tredyffrin PA

Assignee:

Elf Atochem North America, Inc. - Philadelphia PA

International Classification:

B01J 2118
B01J 2706
B01J 2300
C07C 1700
C07C 1708

US Classification:

502439

Abstract:

A supported Lewis acid catalyst such as antimony V on a fluorine-treated moisture-free activated carbon support is provided, as are fluorination processes using such a catalyst.

US Patent:

62114212, Apr 3, 2001

Filed:

Sep 26, 2000

Appl. No.:

9/669365

Inventors:

Maher Y. Elsheikh - Tredyffrin PA
Bin Chen - Tredyffrin PA

Assignee:

Atofina Chemicals, Inc. - Philadelphia PA

International Classification:

C07C 1720

US Classification:

570160

Abstract:

An uncatalyzed liquid phase process is provided for producing 1,1,1-trifluoropropene via the fluorination of 1,1,3-trichloro-1-propene.

US Patent:

58958258, Apr 20, 1999

Filed:

Dec 1, 1997

Appl. No.:

8/980747

Inventors:

Maher Y. Elsheikh - Wayne PA
Michael S. Bolmer - Collegeville PA
Bin Chen - Exton PA

Assignee:

Elf Atochem North America, Inc. - Philadelphia PA

International Classification:

C07C 1708

US Classification:

570167

Abstract:

A process for the preparation of 245fa is provided, wherein 1233zd is first fluorinated to 1234ze, followed by fluorination of 1234ze to 245fa. 245fa is a known foam blowing agent and refrigerant.