Nathan Powell

US Patent:

7619113, Nov 17, 2009

Filed:

Sep 27, 2007

Appl. No.:

11/904574

Inventors:

Nathan Kirk Powell - Waxahachie TX, US

Assignee:

Celanese International Corporation - Dallas TX

International Classification:

C07C 51/12
C07C 53/08

US Classification:

562519, 562607

Abstract:

An improved method of producing acetic acid includes condensing overhead vapor from a light ends column and decanting the condensed vapor to a light phase and a heavy phase. The heavy phase consists predominantly of methyl iodide and at least a portion of the decanted heavy phase is refluxed to the light ends column. Acetic acid content of the light ends column overhead stream and water content of the light ends column product (sidedraw) stream are both decreased, improving purification efficiency.

US Patent:

7989659, Aug 2, 2011

Filed:

May 17, 2007

Appl. No.:

11/804250

Inventors:

Nathan Kirk Powell - Waxahachie TX, US
Nathan Jeremy Nagel - Houston TX, US
Fred Ronald Olsson - Corpus Christi TX, US
Wayne David Picard - Houston TX, US
Ronald David Shaver - Houston TX, US
Ismael Torres Tejeda - Seabrook TX, US

Assignee:

Celanese International Corporation - Dallas TX

International Classification:

C07C 51/10
B01D 15/00

US Classification:

562519, 562517

Abstract:

An improved apparatus and method of producing acetic acid includes condensing overhead vapor to provide reflux to the light ends column as well as condensing vapor from a central portion of the light ends column to increase capacity. Throughput or load on the light ends column is substantially reduced without compromising product quality.

US Patent:

8173076, May 8, 2012

Filed:

Jun 23, 2011

Appl. No.:

13/167360

Inventors:

Nathan Kirk Powell - Waxahachie TX, US
Nathan Jeremy Nagel - Houston TX, US
Fred Ronald Olsson - Corpus Christi TX, US
Wayne David Picard - Houston TX, US
Ronald David Shaver - Houston TX, US
Ismael Torres Tejeda - Seabrook TX, US

Assignee:

Celanese International Corporation - Pasadena TX

International Classification:

B01J 8/02
B01J 35/02
B01J 19/00
B01J 8/00
C07C 53/00
C07C 51/10
C07C 51/12
C07C 51/14
C07C 53/08
C07C 53/10
C07C 51/42

US Classification:

422211, 422126, 422187, 562512, 562517, 562519, 562607, 562608

Abstract:

An improved apparatus and method of producing acetic acid includes condensing overhead vapor to provide reflux to the light ends column as well as condensing vapor from a central portion of the light ends column to increase capacity. Throughput or load on the light ends column is substantially reduced without compromising product quality.

US Patent:

8552226, Oct 8, 2013

Filed:

Jan 6, 2011

Appl. No.:

12/986008

Inventors:

Nathan Kirk Powell - Waxahachie TX, US
Samuel Roundy - League City TX, US
Lincoln Sarager - Houston TX, US
Murray Viard - Houston TX, US
R. Jay Warner - Houston TX, US
Radmila Jevtic - Pasadena TX, US
Victor J. Johnston - Houston TX, US
Fred Ronald Olsson - Corpus Christi TX, US

Assignee:

Celanese International Corporation - Dallas TX

International Classification:

C07C 29/149

US Classification:

568885

Abstract:

Ethanol production from the hydrogenation of acetic acid requires energy to drive the hydrogenation reaction and the purification of the crude ethanol product. Heat integration process to recover heat from one part of the production process to be used within the process improves efficiencies and reduces costs.

US Patent:

20130053606, Feb 28, 2013

Filed:

Oct 4, 2012

Appl. No.:

13/644763

Inventors:

Celanese International Corporation - Irving TX, US
Radmila Wollrab - Pasadena TX, US
Wael Amleh - Pearland TX, US
Gerald Grusendorf - Rosharon TX, US
Trinity Horton Hale - Houston TX, US
Victor J. Johnston - Houston TX, US
Fred Ronald Olsson - Corpus Christi TX, US
Nathan Kirk Powell - Waxahachie TX, US
Manuel Salado - Seabrook TX, US
Lincoln Sarager - Houston TX, US

Assignee:

CELANESE INTERNATIONAL CORPORATION - Irving TX

International Classification:

C07C 27/06

US Classification:

568885

Abstract:

Recovery of ethanol from a crude ethanol product obtained from the hydrogenation of acetic acid. Separation and purification processes of crude ethanol product are employed to allow recovery of ethanol and remove impurities. In addition, the process involves separating the crude ethanol product using an extractive distillation column that employs an extraction agent, such as a recycled stream comprising water.

US Patent:

20140179957, Jun 26, 2014

Filed:

Dec 20, 2012

Appl. No.:

13/722060

Inventors:

- Irving TX, US
Nathan Kirk Powell - Waxahachie TX, US

Assignee:

CELANESE INTERNATIONAL CORPORATION - Irving TX

International Classification:

C07C 29/80
C07C 29/149

US Classification:

568885, 203 82

Abstract:

The present invention relates to processes for producing and recovering ethanol using an intermediate reboiler. An intermediate stream may be withdrawn from a removal zone of a distillation column and recirculated through the intermediate reboiler to the distillation column. The distillation column may also comprise a bottoms reboiler.