Jeffrey C Knapp

US Patent:

7803975, Sep 28, 2010

Filed:

Jul 11, 2007

Appl. No.:

11/827209

Inventors:

Jeffrey P. Knapp - Wilmington DE, US

Assignee:

E.I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C07C 17/38
C07C 21/18

US Classification:

570177, 570136

Abstract:

Disclosed is a process for separating fluoroolefin from a composition comprising HF and fluoroolefin, said process comprising extracting said composition with an extractant. Also disclosed is a composition comprising HF, at least one fluoroolefin, and at least one extractant.

US Patent:

7888539, Feb 15, 2011

Filed:

Feb 19, 2008

Appl. No.:

12/033199

Inventors:

Velliyur Nott Mallikarjuna Rao - Wilmington DE, US
Jeffrey P. Knapp - Wilmington DE, US

Assignee:

E.I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C07C 17/38
C09K 11/08

US Classification:

570178, 2523014 H

Abstract:

The present disclosure related to azeotrope and near-azeotrope compositions comprising PFC-C318 and HFC-236cb. The present disclosure further relates to processes for removing PFC-C318 from HFC-236cb. And the present disclosure further relates to azeotrope and near azeotrope compositions comprising hydrogen fluoride and PFC-C318.

US Patent:

7964760, Jun 21, 2011

Filed:

May 21, 2008

Appl. No.:

12/124441

Inventors:

Mark Brandon Shiflett - Wilmington DE, US
Akimichi Yokozeki - Wilmington DE, US
Jeffrey P. Knapp - Wilmington DE, US

Assignee:

E.I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C07C 17/38

US Classification:

570180, 570263

Abstract:

This invention relates to a process for separating 1,1,2,2-tetrafluoroethane or 1,1,1,2-tetrafluoroethane from a mixture comprising both 1,1,1,2-tetrafluoroethane and 1,1,2,2-tetrafluoroethane wherein at least one ionic liquid is used to enhance the efficiency of the separation.

US Patent:

8007677, Aug 30, 2011

Filed:

Sep 7, 2007

Appl. No.:

12/440068

Inventors:

Jeffrey P. Knapp - Wilmington DE, US
Barry Asher Mahler - Glen Mills PA, US
Velliyur Nott Mallikarjuna Rao - Wilmington DE, US

Assignee:

E.I. du Pont de Nemours and Company - Wilmington DE

International Classification:

A62D 1/00
C09K 5/00
C09K 5/04
B01F 1/00
C23G 5/00
H01B 3/24
B01D 3/34
C07C 17/00
C07C 17/25
C07C 19/08
C07C 21/18
C07C 17/38
C11D 17/00
C11D 17/08

US Classification:

252 2, 252 67, 252364, 252570, 203 29, 203 38, 570155, 570178, 510408, 510415

Abstract:

Disclosed herein are azeotrope and near-azeotrope compositions comprising E-1,1,1,2,3-pentafluoropropene (E-HFC-1225ye) and hydrogen fluoride. The azeotrope and near-azeotrope compositions are useful in processes to produce and in processes to purify E-HFC-1225ye and/or Z-1,1,1,2,3-pentafluoropropene (Z-HFC-1225ye). Also disclosed are processes for the extractive distillation to separate E-HFC-1225ye from Z-HFC-1225ye.

US Patent:

8147709, Apr 3, 2012

Filed:

May 7, 2009

Appl. No.:

12/437014

Inventors:

Barry Asher Mahler - Glen Mills PA, US
Mario Joseph Nappa - Newark DE, US
Jeffrey P. Knapp - Wilmington DE, US

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

C09K 5/04

US Classification:

252 67, 510175

Abstract:

Disclosed are compositions comprising HFC-245eb and at least one additional compound selected from the group consisting of HFO-1234ze, HFC-245fa, HFC-236cb, HFC-236ea, HFC-236fa, HFC-227ea, HFC-227ca, HFO-1225yc, HFO-1225zc, HFO-1225ye, methane, ethane, propane, HFC-23, HFC-143a, HFC-134, HFC-134a, FC-1216, HFO-1234yf, HFC-254eb, HFO-1243zf, and HFC-254fb. Compositions comprising HFC-245eb are useful in processes to make HFO-1234yf. Also disclosed are compositions comprising HFO-1234yf and at least one additional compound selected from the group consisting of HFO-1234ze, HFC-254eb, HFC-254fb, HFO-1243zf, HFCHFC-245eb, HFC-245fa, HFC-245cb, HFC-236cb, HFC-236ea, HFC-236fa, HFC-227ea, HFC-227ca, HFO-1225yc, HFO-1225zc, HFO-1225ye, methane, ethane, propane, HFC-23, HFC-134, HFC-134a, HFO-1132a and FC-1216. Compositions comprising HFO-1234yf are useful as heat transfer compositions for use in refrigeration, air-conditioning and heat pump systems.

US Patent:

8273928, Sep 25, 2012

Filed:

Aug 24, 2007

Appl. No.:

11/844403

Inventors:

Jeffrey P. Knapp - Wilmington DE, US
Barry Asher Mahler - Glen Mills PA, US
Donald J. Toton - New Castle DE, US

Assignee:

E I Du Pont de Nemours and Company - Wilmington DE

International Classification:

C07C 21/18

US Classification:

570136, 570134, 570135

Abstract:

The present disclosure relates to a process for separating a fluoroolefin from a mixture comprising hydrogen fluoride and fluoroolefin, comprising azeotropic distillation both with and without an entrainer. In particular are disclosed processes for separating any of HFC-1225ye, HFC-1234ze, HFC-1234yf or HFC-1243zf from HF.

US Patent:

8333902, Dec 18, 2012

Filed:

Feb 29, 2012

Appl. No.:

13/408686

Inventors:

Barry Asher Mahler - Glen Mills PA, US
Mario Joseph Nappa - Newark DE, US
Jeffrey P. Knapp - Wilmington DE, US

Assignee:

E I du Pont de Nemours and Company - Wilmington DE

International Classification:

C09K 5/04

US Classification:

252 67

Abstract:

Disclosed are compositions comprising HFC-245eb and at least one additional compound selected from the group consisting of HFO-1234ze, HFC-245fa, HFC-236cb, HFC-236ea, HFC-236fa, HFC-227ea, HFC-227ca, HFO-1225yc, HFO-1225zc, HFO-1225ye, methane, ethane, propane, HFC-23, HFC-143a, HFC-134, HFC-134a, FC-1216, HFO-1234yf, HFC-254eb, HFO-1243zf, and HFC-254fb. Compositions comprising HFC-245eb are useful in processes to make HFO-1234yf. Also disclosed are compositions comprising HFO-1234yf and at least one additional compound selected from the group consisting of HFO-1234ze, HFC-254eb, HFC-254fb, HFO-1243zf, HFCHFC-245eb, HFC-245fa, HFC-245cb, HFC-236cb, HFC-236ea, HFC-236fa, HFC-227ea, HFC-227ca, HFO-1225yc, HFO-1225zc, HFO-1225ye, methane, ethane, propane, HFC-23, HFC-134, HFC-134a, HFO-1132a and FC-1216. Compositions comprising HFO-1234yf are useful as heat transfer compositions for use in refrigeration, air-conditioning and heat pump systems.

US Patent:

8410039, Apr 2, 2013

Filed:

Jul 29, 2011

Appl. No.:

13/194001

Inventors:

Joan Ellen Bartelt - Wilmington DE, US
Jeffrey P. Knapp - Wilmington DE, US

Assignee:

E I du Pont de Nemours and Company - Wilmington DE

International Classification:

C11D 7/50

US Classification:

510407, 510177, 510201, 510202, 510365, 510408, 510411, 134 38

Abstract:

The present disclosure provides azeotropic and azeotrope-like compositions comprised of methylperfluoroheptene ethers and trans-1,2-dichloroethylene. The present disclosure also provides for methods of use for the azeotropic and azeotrope-like compositions.