Cynthia A Zimmerman

US Patent:

7910070, Mar 22, 2011

Filed:

Dec 9, 2008

Appl. No.:

12/331048

Inventors:

Cynthia K. Zimmerman - Palatine IL, US
Gavin P. Towler - Inverness IL, US

Assignee:

UOP LLC - Des Plaines IL

International Classification:

B01J 19/00
B01J 8/00
B01J 10/00
C07C 7/00
C10G 35/00
C10G 45/00

US Classification:

422187, 585258, 208133, 208142

Abstract:

A process and system for separating and saturating benzene from a reforming reactor effluent begins with introducing the reforming reactor effluent to a combined stabilizer and naphtha splitter. An overhead stream comprising light ends, a sidecut stream comprising C4− C5 compounds, a bottoms stream comprising C7+ compounds and a heart cut stream comprising C4, C5, C6 compounds including benzene are all removed from the combined stabilizer and naphtha splitter. The heart cut stream is introduced to a side stripper to produce a side stripper overhead stream reduced in benzene and a side stripper bottoms stream enriched in benzene. At least a portion of the side stripper bottoms stream enriched in benzene is introduced into a hydrogenation zone to saturate benzene and generate a hydrogenation zone effluent reduced in benzene. The side stripper overhead stream may be recycled to the combined stabilizer and naphtha splitter.

US Patent:

8404916, Mar 26, 2013

Filed:

Dec 5, 2011

Appl. No.:

13/310954

Inventors:

Jeffrey L. Pieper - Des Plaines IL, US
Cynthia K. Zimmerman - Palatine IL, US
Stephen W. Sohn - Arlington Heights IL, US
Steven P. Lankton - Wheeling IL, US

Assignee:

UOP LLC - Des Plaines IL

International Classification:

C07C 7/12

US Classification:

585822, 585820, 585825, 585829, 585830, 585831

Abstract:

Embodiments of the present invention provide, for an adsorption separation system for separating normal paraffins from a hydrocarbon feed stream, a process for switching the adsorption separation from a triple split desorbent system to a dual split desorbent system, and vice versa. Switching occurs by separating and/or introducing a second flush material in the adsorption separation system. This switching can occur during normal operations.

US Patent:

8586816, Nov 19, 2013

Filed:

Dec 13, 2011

Appl. No.:

13/324013

Inventors:

Jeffrey L. Pieper - Des Plaines IL, US
Stephen W. Sohn - Arlington Heights IL, US
Peter M. Bernard - Chicago IL, US
Cynthia K. Zimmerman - Palatine IL, US

Assignee:

UOP LLC - Des Plaines IL

International Classification:

C07C 7/12

US Classification:

585822, 585820, 585821, 585827

Abstract:

A process to reduce flush circulation rates in an adsorption separation system is presented. The flush stream is used to improve the capacity of the simulated moving bed system by flushing the contents of the transfer lines containing raffinate material back into the adsorbent column. The flush stream is a material that is used to flush the head chambers in the column, or from the rotary valve flush dome sealant.

US Patent:

8624074, Jan 7, 2014

Filed:

Mar 22, 2010

Appl. No.:

12/728543

Inventors:

Gavin P. Towler - Inverness IL, US
Cynthia K. Zimmerman - Palatine IL, US

Assignee:

UOP LLC - Des Plaines IL

International Classification:

C07C 5/333

US Classification:

585659, 585654, 585660, 585661, 585662, 585663

Abstract:

A process for the dehydrogenation of paraffins is presented. The process utilizes a rapid recycling of dehydrogenation catalyst between the dehydrogenation reactor and the catalyst regeneration unit. The process comprises preheating a combined hydrogen and paraffin hydrocarbon feedstream and passing the combined stream to a dehydrogenation reactor. The hydrocarbon feedstream and the catalyst pass through the reactor at a rate to limit the average residence time of the catalyst in the reactor. The catalyst is cycled to a regeneration unit, and passed through the regeneration unit to limit the average residence time of the catalyst in the regeneration unit.

US Patent:

20100145118, Jun 10, 2010

Filed:

Dec 9, 2008

Appl. No.:

12/331022

Inventors:

Cynthia K. Zimmerman - Palatine IL, US
Gavin P. Towler - Inverness IL, US

International Classification:

C07C 7/163

US Classification:

585258

Abstract:

A process and system for separating and saturating benzene from a reforming reactor effluent begins with introducing the reforming reactor effluent to a combined stabilizer and naphtha splitter. An overhead stream comprising light ends, a sidecut stream comprising C4-C5 compounds, a bottoms stream comprising C7+ compounds and a heart cut stream comprising C4, C5, C6 compounds including benzene are all removed from the combined stabilizer and naphtha splitter. The heart cut stream is introduced to a side stripper to produce a side stripper overhead stream reduced in benzene and a side stripper bottoms stream enriched in benzene. At least a portion of the side stripper bottoms stream enriched in benzene is introduced into a hydrogenation zone to saturate benzene and generate a hydrogenation zone effluent reduced in benzene. The side stripper overhead stream may be recycled to the combined stabilizer and naphtha splitter.

US Patent:

20180179124, Jun 28, 2018

Filed:

Dec 28, 2017

Appl. No.:

15/857175

Inventors:

- Des Plaines IL, US
- Madrid, ES
Cynthia K. Zimmerman - Palatine IL, US
Jacques Meunier - Madrid, ES
Leopoldo R. Alcázar - Madrid, ES

International Classification:

C07C 2/66
C07C 5/333
C07C 5/05

Abstract:

Processes using mid-column reboilers in at least one benzene separation columns to reduce the heat duty in alkylation processes are provided. The feed to the aromatics removal zone may exchange heat in a mid-column reboiler in the benzene separation column in the alkylbenzene separation zone followed by exchanging heat in a mid-column reboiler in the benzene separation column in the aromatics removal zone. This arrangement minimizes the hot oil duty on the reboilers in both benzene separation columns

US Patent:

20150005561, Jan 1, 2015

Filed:

Jun 27, 2013

Appl. No.:

13/929353

Inventors:

- Des Plaines IL, US
Stephen W. Sohn - Arlington Heights IL, US
Peter M. Bernard - Chicago IL, US
Cynthia K. Zimmerman - Des Plaines IL, US

International Classification:

C07C 7/00

US Classification:

585802, 422261

Abstract:

An adsorption process using a fractionation column including a drying section is described. The drying section dries the desorbent and removes water from the adsorption process resulting in increased capacity for the adsorbent bed.