Thomas S Zak

age ~78

from West Chester, PA

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Diisobutylene Process
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US Patent:

7414164, Aug 19, 2008
Filed:

Apr 22, 2005
Appl. No.:

11/112502
Inventors:

Thomas S. Zak - West Chester PA, US
Assignee:

Lyondell Chemical Technology, L.P. - Houston TX
International Classification:

C07C 2/04
C07C 2/28
US Classification:

585515, 585329, 585510, 585526
Abstract:

This invention is a process for producing diisobutylene from isobutylene. The process comprises first forming dry sulfonic acid resin by contacting water wet sulfonic acid resin catalyst with a first reaction feed comprising isobutylene under conditions effective to produce tertiary butyl alcohol from the reaction of isobutylene and water, and then contacting the dry sulfonic acid resin with a second reaction feed comprising isobutylene under conditions effective to oligomerize isobutylene to produce diisobutylene.

Propylene And Isoprene Production
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US Patent:

7816572, Oct 19, 2010
Filed:

Aug 7, 2007
Appl. No.:

11/890728
Inventors:

David W. Leyshon - West Chester PA, US
Thomas S. Zak - West Chester PA, US
Assignee:

Lyondell Chemical Technology, L.P. - Greenville DE
International Classification:

C07C 5/00
US Classification:

585324, 585644, 585332, 585654, 585656
Abstract:

A process for producing propylene and isoprene from a feed stream comprising 1-butene and isobutene is disclosed. The feed stream is reacted in a catalytic distillation reactor containing an olefin isomerization catalyst to produce an overhead stream comprising 2-butene and isobutene and a bottoms stream comprising 2-butene. The overhead stream is reacted in the presence of a metathesis catalyst to produce propylene and isoamylenes. Isoprene is produced by dehydrogenation of isoamylenes.

Diisobutylene Process
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US Patent:

20060111598, May 25, 2006
Filed:

Nov 22, 2004
Appl. No.:

10/994513
Inventors:

Andrew Kahn - Eagleville PA, US
Thomas Zak - West Chester PA, US
International Classification:

C07C 2/02
US Classification:

585518000
Abstract:

This invention is a process for producing diisobutylene from isobutylene. The process comprises contacting isobutylene with a solid adsorbent to remove sulfur and/or nitrogen impurities from the isobutylene, followed by oligomerizing the isobutylene to diisobutylene using a sulfonic acid-type ion exchange resin. The solid adsorbent removes sulfur and/or nitrogen impurities from the isobutylene and surprisingly increases both catalyst activity and catalyst life of the sulfonic acid-type ion exchange resin.

Diisobutylene Production
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US Patent:

20070043247, Feb 22, 2007
Filed:

Aug 19, 2005
Appl. No.:

11/207272
Inventors:

Kenneth Webber - Friendswood TX, US
Thomas Zak - West Chester PA, US
International Classification:

C07C 2/04
US Classification:

585510000
Abstract:

A method for forming diisobutylene from a hydrocarbon stream that contains acetylenics and a low concentration of isobutylene, comprising at least reducing the acetylenic content of the stream before catalytically oligomerizing the isobutylene to diisobutylene.

Selective Olefin Oligomerization
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US Patent:

20070083069, Apr 12, 2007
Filed:

Oct 7, 2005
Appl. No.:

11/245708
Inventors:

Lawrence Candela - Havertown PA, US
Thomas Zak - West Chester PA, US
International Classification:

C07C 2/04
US Classification:

585510000
Abstract:

The present invention relates to a process for the oligomerization of an olefin in the presence of a selectivity enhancing alcohol modifier wherein the modifier is formed by the reaction of olefin and water in a first reaction, and the thus formed modifier substantially free of water is separated and passed to a second reaction wherein olefin is oligomerized in the presence of the said modifier.

Diisobutylene Process
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US Patent:

20100145122, Jun 10, 2010
Filed:

Dec 4, 2008
Appl. No.:

12/315605
Inventors:

Thomas S. Zak - West Chester PA, US
David W. Leyshon - West Chester PA, US
International Classification:

C07C 2/06
US Classification:

585506
Abstract:

This invention is a process for producing diisobutylene from isobutylene. The process comprises first passing water through a downflow reactor containing a bed of sulfonic acid resin to produce an effluent stream having a pH of at least 5, then dimerizing isobutylene by contacting the sulfonic acid resin with a reaction feed comprising isobutylene and tertiary butyl alcohol. The downflow reactor comprises a bottom, an inlet located above the resin bed, an outlet located below the resin bed, and inert material in the space from the bottom of the reactor to at least above the outlet.

Process For Hydrogenating Aqueous Aldehyde Mixtures
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US Patent:

58746528, Feb 23, 1999
Filed:

Oct 18, 1993
Appl. No.:

8/138780
Inventors:

Rangasamy Pitchai - West Chester PA
Thomas S. Zak - West Chester PA
Assignee:

Arco Chemical Technology, L.P. - Greenville DE
International Classification:

C07C 2938
US Classification:

568862
Abstract:

A process for hydrogenating aqueous mixtures of 4-hydroxybutanal and 3-hydroxy-2-methylpropanal is disclosed. The process uses a metallic Pt--Ru catalyst supported on. gamma. -alumina. The process gives improved yields of 2-methyl-1,3-propanediol while minimizing the formation of unwanted by-products such as isobutyl alcohol and tetrahydrofuran.

Phenol Separation
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US Patent:

55385990, Jul 23, 1996
Filed:

Jun 5, 1995
Appl. No.:

8/463833
Inventors:

Tim T. Wong - Downingtown PA
Stephen H. Harris - Kennett Square PA
Thomas S. Zak - West Chester PA
Te Chang - West Chester PA
Assignee:

ARCO Chemical Technology, L.P. - Greenville DE
International Classification:

B01D 340
US Classification:

203 58
Abstract:

A process is provided whereby phenol is separated from 1-phenyl ethanol, acetophenone or mixtures by extractive distillation with sulfolane as extractive distillation agent which decreases phenol volatility relative to 1-phenyl ethanol and acetophenone.