Donald J Toton from 15 Andover Ct, New Castle, DE 19720, age 79, Phone: (302)3222528

Us Patents

Processes For Separation Of Fluoroolefins From Hydrogen Fluoride By Azeotropic Distillation
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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.

Catalytic Isomerization Between E And Z Isomers Of 1,2,3,3,3-Pentafluoropropene
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US Patent:

8044252, Oct 25, 2011
Filed:

Jul 11, 2007
Appl. No.:

12/373588
Inventors:

Mario Joseph Nappa - Newark DE, US
Donald J. Toton - New Castle DE, US
Velliyur Nott Mallikarjuna Rao - Wilmington DE, US
Assignee:

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

C07C 17/00
US Classification:

570236
Abstract:

A process is disclosed to increase the Z/E ratio of 1,2,3,3,3-pentafluoropropene. The process involves contacting a starting material comprising 1,2,3,3,3-pentafluoropropene with a catalyst on AlFor carbon, wherein the catalyst is selected from the group consisting of SbClF, TiClF, SnClFand TaClFwherein w is from 0 to 4, x is from 0 to 3, y is from 0 to 3, z is from 0 to 4, to obtain a product wherein the Z/E ratio of 1,2,3,3,3-pentafluoropropene is increased relative to the Z/E ratio of 1,2,3,3,3-pentafluoropropene in the starting material. A process is also disclosed to decrease the Z/E ratio of 1,2,3,3,3-pentafluoropropene. The process involves contacting a starting material comprising 1,2,3,3,3-pentafluoropropene with a catalyst on AlFor carbon, wherein the catalyst is selected from the group consisting of SbClF, TiClF, SnClFand TaClFwherein w is from 0 to 4, x is from 0 to 3, y is from 0 to 3, z is from 0 to 4, to obtain a product wherein the Z/E ratio of 1,2,3,3,3-pentafluoropropene is decreased relative to the Z/E ratio of 1,2,3,3,3-pentafluoropropene in the starting material.

Vapor Phase Production Of 1,1,1,2,3,3,3-Heptafluoropropane From Hydrogen Fluoride And Hexafluoropropylene
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US Patent:

20030088132, May 8, 2003
Filed:

Oct 31, 2002
Appl. No.:

10/285193
Inventors:

Ralph Miller - Newark DE, US
Mario Nappa - Newark DE, US
Donald Toton - New Castle DE, US
International Classification:

C07C017/08
C07C019/08
US Classification:

570/164000
Abstract:

A process for the production of HFC-227ea from HF and HFP is provided. This process takes advantage of an azeotropic composition of HF and HFC-227ea in order to produce HFC-227ea essentially free of HF and recycle unreacted HF back to the reactor. The recycle of said azeotropic composition, also allows the use of HFC-227ea as a diluent to aid in control of reactor temperature for a highly exothermic reaction.

Processes For Separation Of Fluoroolefins From Hydrogen Fluoride By Azeotropic Distillation
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US Patent:

20120305382, Dec 6, 2012
Filed:

Aug 16, 2012
Appl. No.:

13/587468
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:

B01D 3/36
US Classification:

203 67, 203 50, 203 68
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.

Integrated Process For The Production Of Z-1,1,1,4,4,4-Hexafluoro-2-Butene
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US Patent:

20170369403, Dec 28, 2017
Filed:

Sep 8, 2017
Appl. No.:

15/699067
Inventors:

- WILMINGTON DE, US
STEPHAN M. BRANDSTADTER - PHILADELPHIA PA, US
PATRICIA CHEUNG - GLEN MILLS PA, US
MARIO JOSEPH NAPPA - LEESBURG FL, US
SHENG PENG - HOCKESSIN DE, US
DONALD J. TOTON - NEW CASTLE DE, US
International Classification:

C07C 17/25
C07C 17/281
C07C 17/23
C07C 17/354
Abstract:

Disclosed is a process for the preparation of cis-1,1,1,4,4,4-hexafluoro-2-butene comprising contacting 1,1,1-trifluorotrichloroethane with hydrogen in the presence of a catalyst comprising ruthenium to produce a product mixture comprising 1316mxx, recovering said 1316mxx as a mixture of Z- and E-isomers, contacting said 1316mxx with hydrogen, in the presence of a catalyst selected from the group consisting of copper on carbon, nickel on carbon, copper and nickel on carbon and copper and palladium on carbon, to produce a second product mixture, comprising E- or Z-CFC-1326mxz, and subjecting said second product mixture to a separation step to provide E- or Z-1326mxz. The E- or Z-1326mxz can be dehydrochlorinated in an aqueous basic solution with an alkali metal hydroxide in the presence of a phase transfer catalyst to produce hexafluoro-2-butyne, which can then be selectively hydrogenated to produce Z-1, 1,1,4,4,4-hexafluoro-2-butene using using either Lindlar's catalyst, or a palladium catalyst further comprising a lantanide element or silver.

Integrated Process For The Production Of Z-1,1,1,4,4,4-Hexafluoro-2-Butene
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US Patent:

20160347694, Dec 1, 2016
Filed:

Feb 6, 2015
Appl. No.:

15/114944
Inventors:

- Wilmington DE, US
STEPHAN M. BRANDSTADTER - PHILADELPHIA PA, US
PATRICIA CHEUNG - GLEN MILLS PA, US
MARIO JOSEPH NAPPA - NEWARK DE, US
SHENG PENG - HOCKESSIN DE, US
DONALD J. TOTON - NEW CASTLE DE, US
Assignee:

THE CHEMOURS COMPANY FC, LLC - WILMINGTON
International Classification:

C07C 17/25
C07C 17/354
C07C 17/281
Abstract:

Disclosed is a process for the preparation of cis-1,1,1,4,4,4-hexafluoro-2-butene comprising contacting 1,1,1-trifluorotrichloroethane with hydrogen in the presence of a catalyst comprising ruthenium to produce a product mixture comprising 1316mxx, recovering said 1316mxx as a mixture of Z- and E-isomers, contacting said 1316mxx with hydrogen, in the presence of a catalyst selected from the group consisting of copper on carbon, nickel on carbon, copper and nickel on carbon and copper and palladium on carbon, to produce a second product mixture, comprising E- or Z-CFC-1326mxz, and subjecting said second product mixture to a separation step to provide E- or Z-1326mxz. The E- or Z-1326mxz can be dehydrochlorinated in an aqueous basic solution with an alkali metal hydroxide in the presence of a phase transfer catalyst to produce hexafluoro-2-butyne, which can then be selectively hydrogenated to produce Z-1,1,1,4,4,4-hexafluoro-2-butene using either Lindlar's catalyst, or a palladium catalyst further comprising a lantanide element or silver.