Karl R Krause

US Patent:

20120046505, Feb 23, 2012

Filed:

May 7, 2010

Appl. No.:

13/318557

Inventors:

Mario Joseph Nappa - Newark DE, US
Patricia Cheung - Glen Mills PA, US
Karl R. Krause - Kennett Square PA, US
Michael A. Sisk - Hockessin DE, US

Assignee:

E. I. DU PONT DE NEMOURS AND COMPANY - Wilmington DE

International Classification:

C07C 17/395

US Classification:

570180

Abstract:

A process is disclosed for reducing the amount of monofluoroacetate. The process involves (a) contacting a hydrofluorocarbon with a reactant basic aqueous solution to produce an organic phase solution containing a hydrofluoroolefin and an aqueous phase solution containing a monofluoroacetate; and (b) heating the aqueous phase solution to an effective temperature to reduce the amount of monofluoroacetate in the aqueous phase solution, wherein fluoride concentration in the aqueous phase solution is substantially high. Another process is disclosed for reducing the amount of monofluoroacetate. The process involves (a) contacting a first batch of hydrofluorocarbon with a first batch of reactant basic aqueous solution to produce a first batch of organic phase solution containing a hydrofluoroolefin and a first batch of aqueous phase solution containing a monofluoroacetate; (b) separating the first batch of organic phase solution from the first batch of aqueous phase solution; (c) mixing a second batch of hydrofluorocarbon and a second batch of reactant basic aqueous solution with the separated first batch of organic phase solution to produce a second batch of organic phase solution containing a hydrofluoroolefin and a second batch of aqueous phase solution containing a monofluoroacetate; (d) combining the first batch of aqueous phase solution with the second batch of aqueous phase solution; and (e) heating the combined aqueous phase solutions to an effective temperature to reduce the amount of monofluoroacetate in the combined aqueous phase solutions, wherein fluoride concentration in the combined aqueous phase solutions is substantially high.

US Patent:

56458088, Jul 8, 1997

Filed:

Aug 7, 1996

Appl. No.:

8/693727

Inventors:

Karl Robert Krause - Wilmington DE

Assignee:

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

International Classification:

C07C 1124

US Classification:

4232453

Abstract:

Process for the conversion of waste gas streams containing volatile carbon compounds to carbon monoxide by contacting the gas stream with an electrically conductive metal or electrically conductive metal oxide catalyst that is heated to reaction temperature by induction heating.

US Patent:

59005114, May 4, 1999

Filed:

Mar 26, 1998

Appl. No.:

9/048603

Inventors:

Sourav Kumar Sengupta - Wilmington DE
Theodore Augur Koch - Wilmington DE
Karl Robert Krause - Orange TX

Assignee:

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

International Classification:

C07C20948

US Classification:

564492

Abstract:

A process for continuous hydrogenation of adiponitrile (ADN) to hexamethylene diamine (HMD) and optionally to amninocapronitrile (ACN) involving the catalytic hydrogenation of adiponitrile at relatively low temperature (e. g. , 75. degree. C. ) and pressure (e. g. , 500 psig) using a sponge cobalt catalyst (Raney. RTM. Co) in a reaction medium that is substantially free of caustic. In such a process periodic addition of water controls the production of side reaction products and the periodic addition of ammonium hydroxide rejuvenates the catalyst. Hexamethylene diamine is an important intermediate for the synthesis of polyamides such as Nylon-6,6 and aminocapronitrile is a potential intermediate of Nylon-6.

US Patent:

63159724, Nov 13, 2001

Filed:

Nov 10, 1998

Appl. No.:

9/190051

Inventors:

Mehrdad Mehdizadeh - Wilmington DE
Theodore A. Koch - Wilmington DE
Karl Robert Krause - Orange TX
Sourav Kumar Sengupta - Wilmington DE
Benny Earl Blackwell - Newark DE

Assignee:

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

International Classification:

C01C 302

US Classification:

423376

Abstract:

This invention relates to improvements in processes and catalysts for elevated temperature, gas phase, catalyzed reactions in general; it is particularly illustrated by reference to the manufacture of hydrogen cyanide.

US Patent:

54705410, Nov 28, 1995

Filed:

Dec 28, 1993

Appl. No.:

8/174525

Inventors:

Theodore A. Koch - Wilmington DE
Karl R. Krause - Wilmington DE
Mehrdad Mehdizadeh - Wilmington DE

Assignee:

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

International Classification:

B01J 1908

US Classification:

422186

Abstract:

An apparatus and process for production of HCN from ammonia and a hydrocarbon gas by the use of microwave energy using a single mode microwave reactor.

US Patent:

59582731, Sep 28, 1999

Filed:

Jul 3, 1997

Appl. No.:

8/887548

Inventors:

Theodore A. Koch - Wilmington DE
Karl Robert Krause - Orange TX
Mehrdad Mehdizadeh - Wilmington DE
Sourav Kumar Sengupta - Wilmington DE
Benny Earl Blackwell - Newark DE

Assignee:

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

International Classification:

H05B 626

US Classification:

219651

Abstract:

An improved induction heated reactor apparatus involving a reaction zone with inlet and outlet and containing an array of electrically conductive catalyst entities (susceptor entities) comprising pellets, rings, or rods containing a core externally coated with a substantially uniform and complete catalyst metal (e. g. , platinum, platinum-iridium alloy, or platinum-rhodium alloy) wrap, coating, or surface impregnated, or containing the catalyst metal as a foam which are inductively heated to produce chemical product from a catalytic reaction. Such an apparatus is particularly useful in the catalytic generation of HCN at elevated temperatures.

US Patent:

55296696, Jun 25, 1996

Filed:

Jun 6, 1995

Appl. No.:

8/468392

Inventors:

Theodore A. Koch - Wilmington DE
Karl R. Krause - Wilmington DE
Mehrdad Mehdizadeh - Wilmington DE

Assignee:

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

International Classification:

C01B 300

US Classification:

20415743

Abstract:

An apparatus and process for production of HCN from ammonia and a hydrocarbon gas by the use of microwave energy using a single mode microwave reactor.

US Patent:

20220348524, Nov 3, 2022

Filed:

Jul 13, 2022

Appl. No.:

17/812203

Inventors:

- Wilmington DE, US
Karl Krause - Kennett Square PA, US

International Classification:

C07C 17/25

Abstract:

A dehydrohalogenation product includes a hydrochlorofluorocarbon mixture of a fluoroolefin of formula RCX═CZQ and a halofluoroalkane of formula RCXYCZQT. R is a perfluorinated alkyl group and X, Z, and Q are independently H or halogen. One of Y and T is H and the other is Cl, Br, or I. About 80% or greater of the hydrochlorofluorocarbon mixture is the fluoroolefin. The dehydrohalogenation product also includes a caustic agent and a solvent. In some embodiments, the dehydrohalogenation product is free of any catalyst, including any phase transfer catalyst.