Mark A Liepa

US Patent:

6563010, May 13, 2003

Filed:

Jun 3, 2002

Appl. No.:

10/161004

Inventors:

Mark A. Liepa - Exton PA

Assignee:

ARCO Chemical Technology, L.P. - Greenville DE

International Classification:

C07C 2734

US Classification:

568917, 210673, 210670, 210676

Abstract:

The process for removing impurities from a liquid by contact with a solid adsorbent using parallel contact adsorbent beds such that when one bed is contacting the liquid the parallel bed is being regenerated by contact with heated inert gas, wherein during changeover of the beds inert gas is transferred from the regenerated bed to the spent bed during the period that liquid is being drained from the spent bed.

US Patent:

6710194, Mar 23, 2004

Filed:

Jan 23, 2003

Appl. No.:

10/349655

Inventors:

Robert N. Cochran - West Chester PA
Prakash G. Balan - Wilmington DE
Mark A. Liepa - Exton PA
Bernard Cooker - Malvern PA

Assignee:

ARCO Chemical Technology, L.P. - Greenville DE

International Classification:

C07D30106

US Classification:

549533, 549532

Abstract:

Propylene oxide is produced by liquid phase reaction of propylene oxygen and hydrogen in contact with a solid epoxidation catalyst at elevated temperature and pressure, the reaction conditions being regulated to provide a weight ratio of dissolved oxygen to dissolved hydrogen in the liquid reaction mixture of at least 16.

US Patent:

7575604, Aug 18, 2009

Filed:

Oct 6, 2006

Appl. No.:

11/544326

Inventors:

Paul E. Galick - West Chester PA, US
Mark A. Liepa - Exton PA, US

Assignee:

Lyondell Chemical Technology, L.P. - Wilmington DE

International Classification:

D06L 1/00
D06L 1/02
D06L 1/20

US Classification:

8142, 8137, 8141, 134 34, 134 11, 134 12

Abstract:

A drycleaning method is disclosed. The method uses a composition comprising 30 to 90 wt. % of a dipropylene glycol C-Calkyl ether, 5 to 65 wt. % of one or more C-Chydrocarbons, and 1 to 10 wt. % of water. The method combines acceptable stain removal with faster-than-expected evaporability, particularly at the elevated temperatures used in commercial drycleaning.

US Patent:

20040124140, Jul 1, 2004

Filed:

Dec 30, 2002

Appl. No.:

10/331703

Inventors:

Gary Sawyer - Media PA, US
Mark Liepa - Exton PA, US
Prakash Balan - Wilmington DE, US

International Classification:

B01D011/00

US Classification:

210/634000, 210/323200, 210/484000, 210/497010

Abstract:

Reduced attrition of catalyst and extended operation of heterogenous catalyzed slurry reactions in draught tube reactors is facilitated by locating vertically oriented filter media within the draught tube reactor annular space to provide a product outlet stream substantially free of catalyst.

US Patent:

20090187049, Jul 23, 2009

Filed:

Jan 17, 2008

Appl. No.:

12/009212

Inventors:

Xiangmin Li - Glen Mills PA, US
Lawrence M. Candela - Havertown PA, US
Mark A. Liepa - Exton PA, US

International Classification:

C07C 43/10

US Classification:

568678

Abstract:

The invention is a process for producing a propylene glycol monoalkyl ether which comprises first reacting propylene oxide and an alcohol in the presence of an alkali or alkaline earth metal alkoxide catalyst to produce an alkoxylation mixture comprising propylene glycol monoalkyl ether; distilling the alkoxylation mixture to produce a first overhead stream comprising propylene oxide and alcohol and a first bottoms stream comprising propylene glycol monoalkyl ether; and then distilling the first bottoms stream to produce purified propylene glycol monoalkyl ether as a second overhead stream. The reaction and/or one or more of the distillation steps occur in the presence of an alkali metal borohydride. The process produces propylene glycol monoalkyl ether with low UV absorbance and reduced carbonyl impurities.

US Patent:

55655815, Oct 15, 1996

Filed:

Oct 18, 1990

Appl. No.:

7/599763

Inventors:

Mark A. Liepa - West Chester PA

Assignee:

ARCO Chemical Technology, L.P. - Greenville DE

International Classification:

C07D31300

US Classification:

549346

Abstract:

The present invention relates to the epoxidation of olefins using cyclohexyl hydroperoxide as reactant, the improvement being using a secondary or tertiary alcohol such as cyclohexanol or tertiary butyl alcohol as a stabilizing agent during the epoxidation, the alcohol stabilizer being fed to the epoxidation reaction zone in an amount greater than 3 moles per mole of hydroperoxide fed to the epoxidation reaction zone.

US Patent:

59731710, Oct 26, 1999

Filed:

Oct 7, 1998

Appl. No.:

9/167329

Inventors:

Robert N. Cochran - West Chester PA
John C. Jubin - West Chester PA
Mark A. Liepa - Exton PA
Robert Nedwick - Broomall PA
Rangasamy Pitchai - West Chester PA
W. Wayne Wentzheimer - Grand Rapids MI

Assignee:

ARCO Chemical Technology, LP - Greenville DE

International Classification:

C07D30106

US Classification:

549533

Abstract:

An integrated process is provided for the production of propylene oxide from propane wherein propane is dehydrogenated to propylene and hydrogen and the resulting propylene, propane, and hydrogen mixture together with added oxygen is reacted over a palladium on titanium silicilite catalyst to form propylene oxide, the molar ratio of oxygen to hydrogen in the reaction feed being at least about 2/1.