John J Wismer, 601501 Main St, Collegeville, PA 19426

6479718, Nov 12, 2002

Mar 28, 2002

10/108607

Maher Y. Elsheikh - Tredyffrin PA
Jonathan M. Tracy - Pottstown PA
John A. Wismer - Lower Makefield PA

Atofina Chemicals, Inc. - Philadelphia PA

C07C 1708

570167, 570165, 570166, 570168, 570169

An improved liquid phase process is provided for the fluorination of perchloroethylene to 1,1-dichloro-2,2,2-trifluoroethane in the presence of an antimony catalyst.

8642818, Feb 4, 2014

Nov 12, 2009

13/127615

Maher Y. Elsheikh - Wayne PA, US
Philippe Bonnet - Lyons, FR
John A. Wismer - Washington Crossing PA, US

Arkema Inc. - King of Prussia PA

C07C 17/20

570170, 570151

The invention relates to a process for manufacturing 1,1,1,2-tetrafluoropropene (1234yf, CF—CF═CH) from 1,1,3,3-tetrachlororopropene (1230za, CCl═CH—CHCl) and/or 1,1,1,3,3-pentachloropropane (240fa, CClCHCHCl). The process comprises an isomerization step of 1-chloro-3,3,3 trifluoropropene (1233zd, CF—CH═CHCl) to 2-chloro-3,3,3 trifluoropropene (1233xf or CF—CCl═CH).

8642819, Feb 4, 2014

Nov 12, 2009

13/127817

Maher Y. Elsheikh - Wayne PA, US
Philippe Bonnet - Lyons, FR
John A. Wismer - Washington Crossing PA, US

Arkema Inc. - King of Prussia PA

C07C 19/08

570170, 570151

The present invention provides a process for the manufacture of trans 1-chloro-3,3,3-trifluoropropene (E-1233zd). The first step of the process comprises the fluorination of 1,1,3,3-tetrachlororopropene (1230za, CCh═CH—CHCh) and/or 1,1,1,3,3-pentaachloropropane (240fa) to a mixture of cis 1233zd (Z-1233zd) and trans 1233zd (E-1233zd). The second step of the process comprises a separation of the mixture formed in the first step to isolate cis 1233zd (Z-1233zd) from the mixture. The third step of the process comprises isomerization of cis 1233zd (Z-1233zd) to trans 1233zd (E-1233zd).

5639924, Jun 17, 1997

Nov 29, 1994

8/346489

Maher Yousef Elsheikh - Wayne PA
Michael Sheppard Bolmer - Collegeville PA
Jean Pierre Schirmann - Paris, FR
John Aloysius Wismer - Washington Crossing PA
Wayne E. Brooks - Paducah KY

Elf Atochem North America, Inc. - Philadelphia PA

C07C 1908

570168

Process for synthesizing 1,1,1-trifluoroethane (143a) in the gaseous phase by reacting 1,1-defluoro-1-chloroethane in gaseous phase in the presence of a Cr catalyst. The process may be run isothermally or adiabatically, without co-feeding air or other oxygen containing gas, in the presence or absence of a Ni, Co, Zn or Mn cocatalyst for the Cr catalyst. The catalyst may be unsupported or supported with a support preferably selected from activated carbon, alumina and fluorided alumina. The formation of olefin byproduct can be kept to less than 10 ppm in accordance with the process of the invention.

5242672, Sep 7, 1993

May 2, 1988

7/188863

Jeffrey H. Yen - Woolwich NJ
Glenn T. Carroll - Jeffersonville PA
Vijay R. Srinivas - Uwchlan PA
William J. Tuszynski - Milford Township, Bucks County PA
John A. Wismer - Devon PA

Elf Atochem North America, Inc. - Philadelphia PA

C01B 1720
E21B 3706

423562

A process for removing sulfur from an organic polysulfide by reaction with an aqueous stripping solution of at least one sulfide salt and/or hydrosulfide salt in a multi-stage, continuous, countercurrent flow, reaction system wherein the sulfur is stripped from the polysulfide into the aqueous stripping solution phase which is separated from the polysulfide organic phase.

5608124, Mar 4, 1997

May 1, 1992

7/879068

John A. Wismer - Devon PA

Elf Atochem North America, Inc. - Philadelphia PA

C07C 1720

570164

A continuous non-catalytic process for the manufacture of 1,1-dichloro-1-fluoroethane/1-chloro-1,1-difluoroethane mixtures from 1,1-dichloro-1-fluoroethane is provided. Hydrogen fluoride and 1,1,1-trichloroethane are continuously feed a molar ratio of from about 3. 0 to about 5. 2 to form a liquid phase hydrofluorination reaction mixture. Vapor phase reaction product is continuously withdrawn from the reaction zone, and hydrogen fluoride is continuously selectively refluxed back to the reaction mixture. 1,1,1-Trichloroethane utilization approaches 100% , with selectivity for 1,1-dichloro-1-fluoroethane between 15% and 85%, based upon the amount of 1,1-dichloro-1-fluoroethane and 1-chloro-1,1-difluoroethane contained in the gaseous reaction product.

4950364, Aug 21, 1990

May 4, 1989

7/347603

John A. Wismer - Devon PA

Pennwalt Corporation - Philadelphia PA

B01D 338
C07C 1738

203 50

1,1-Dichloro-1-fluroethane and 1,1,1,3,3-pentafluorobutane are separated from their liquid mixtures, such as liquid mixtures resulting from the hydrofluorination of 1,1,1-trichloroethane or vinylidene chloride. 1,1-Dichloro-1-fluoroethane and 1,1,1,3,3-pentafluorobutane are completely separated by distillation, by adding to the mixture thereof a liquid containing at least about 3 moles of hydrogen fluoride per mole of 1,1-dichloro-1-fluoroethane in the mixture subject to separation.

4975156, Dec 4, 1990

May 4, 1989

7/347606

John A. Wismer - Devon PA

Atochem North America, Inc. - Philadelphia PA

B01D 300
C07C 1738

203 39

1,1-Dichloro-1-fluoroethane, 1-chloro-1,1-difluoroethane and hydrogen fluoride are separated from their liquid mixtures, such as liquid mixtures resulting from the hydrofluorination, of 1,1,1-trichloroethane or vinylidene chloride. 1,1-Dichloro-1-fluoroethane and 1-chloro-1,1-difluoroethane are first separated by distillation into their respective mixtures with hydrogen fluoride, which are thereafter subjected to parallel phase separations resulting in two hydrogen fluoride-enriched liquid phases, a 1-chloro-1,1-difluoroethane-enriched liquid phase and a 1,1-dichloro-1-fluoroethane-enriched liquid phase. 1-Chloro-1,1-difluoroethane and 1,1-dichloro-1-fluoroethane are purified from the respective halohydrocarbon-enriched liquid phases by distillation. The hydrogen fluoride-enriched stream generated from the phase separation of the hydrogen fluoride/1,1-dichloro-1-fluoroethane mixture is recycled to the hydrofluorination reaction mixture.