Dennis J Stanley

US Patent:

20160264495, Sep 15, 2016

Filed:

May 20, 2016

Appl. No.:

15/160507

Inventors:

- Baytown TX, US
Jeffrey L. Andrews - Houston TX, US
Timothy P. Bender - Houston TX, US
Robert G. Tinger - Friendswood TX, US
Dennis J. Stanley - Houston TX, US
George J. Wagner - Tomball TX, US

International Classification:

C07C 5/27
C07C 2/86
C07C 6/06

Abstract:

In a process for producing para-xylene, a toluene-containing stream is contacted with a methylating agent under conditions effective to convert toluene to xylenes and produce a methylated effluent stream. Para-xylene is recovered from the methylated effluent stream to produce a para-xylene depleted stream and part of the para-xylene depleted stream is contacted with a xylene isomerization catalyst under liquid phase isomerization conditions effective to produce a first isomerized stream, while part of the para-xylene depleted stream is contacted with a xylene isomerization catalyst under vapor phase isomerization conditions effective to produce a second isomerized stream. The first and second isomerized streams are then recycled to the para-xylene recovery step.

US Patent:

20160185686, Jun 30, 2016

Filed:

Mar 2, 2016

Appl. No.:

15/058474

Inventors:

- Baytown TX, US
Jeevan S. Abichandani - Houston TX, US
Jeffrey L. Andrews - Houston TX, US
Robert G. Tinger - Friendswood TX, US
Dennis J. Stanley - Houston TX, US
George J. Wagner - Tomball TX, US

International Classification:

C07C 5/27
C10G 35/04
C07C 7/14
C07C 6/06
C07C 7/04
C07C 7/12
B01J 19/24
C07C 2/86

Abstract:

In a process for producing para-xylene, a feed stream comprising C aromatic hydrocarbons is separated into a toluene-containing stream, a Caromatic hydrocarbon-containing stream and a C aromatic hydrocarbon-containing stream. The toluene-containing stream is contacted with a methylating agent to convert toluene to xylenes and produce a methylated effluent stream. Para-xylene is recovered from the Caromatic hydrocarbon-containing stream and the methylated effluent stream in a para-xylene recovery section to produce a para-xylene depleted stream, which is then contacted with a xylene isomerization catalyst under liquid phase conditions effective to isomerize xylenes in the para-xylene depleted stream and produce an isomerized stream. The C-containing stream with a transalkylation catalyst under conditions effective to convert C-aromatics to C-aromatics and produce a transalkylated stream, which is recycled together with the isomerized stream to the para-xylene recovery section.

US Patent:

20160046544, Feb 18, 2016

Filed:

Jun 18, 2015

Appl. No.:

14/743048

Inventors:

- Baytown TX, US
Kevin J. Knob - Fairfield CA, US
Dennis J. Stanley - Houston TX, US
Terri S. Vander Pol - Baytown TX, US
Chunshe Cao - Shanghai, CN
Xiaobo Zheng - Houston TX, US
Thierry LeFlour - Paris, FR
Jacques Rault - Paris, FR
Stephane Claudel - Verneuil sur Seine, FR
Isabell Prevost - Rueil Malmaison, FR
Jerome Pigourier - Meudon, FR
Celia Fernandez - Paris, FR

International Classification:

C07C 5/27
C07C 4/18
C07C 6/06

Abstract:

In a process for producing para-xylene, at least one feed comprising C aromatic hydrocarbons is supplied to a dividing wall distillation column to separate the feed into a Caromatic hydrocarbon-containing stream, a Caromatic hydrocarbon-containing stream and a C aromatic hydrocarbon-containing stream. At least part of the Caromatic hydrocarbon-containing stream is then supplied to a para-xylene recovery unit to recover para-xylene from the Caromatic hydrocarbon-containing stream and produce a para-xylene depleted stream. The para-xylene depleted stream is contacted with a xylene isomerization catalyst in a xylene isomerization zone under conditions effective to isomerize xylenes in the para-xylene depleted stream and produce an isomerized stream, which is then at least partially recycled to the para-xylene recovery unit.

US Patent:

20150376087, Dec 31, 2015

Filed:

Jun 10, 2015

Appl. No.:

14/735695

Inventors:

- Baytown TX, US
Jeffrey L. Andrews - Houston TX, US
Timothy P. Bender - Houston TX, US
Robert G. Tinger - Friendswood TX, US
Dennis J. Stanley - Houston TX, US
George J. Wagner - Tomball TX, US

International Classification:

C07C 2/86
C07C 6/12
B01J 19/24
C07C 5/27

Abstract:

In a process for producing para-xylene, a toluene-containing stream is contacted with a methylating agent under conditions effective to convert toluene to xylenes and produce a methylated effluent stream. Para-xylene is recovered from the methylated effluent stream to produce a para-xylene depleted stream and part of the para-xylene depleted stream is contacted with a xylene isomerization catalyst under liquid phase isomerization conditions effective to produce a first isomerized stream, while part of the para-xylene depleted stream is contacted with a xylene isomerization catalyst under vapor phase isomerization conditions effective to produce a second isomerized stream. The first and second isomerized streams are then recycled to the para-xylene recovery step.