Albert Chienwei Wu

US Patent:

6355851, Mar 12, 2002

Filed:

Nov 13, 2000

Appl. No.:

09/711285

Inventors:

Albert H. Wu - Medford NJ
James T. Wei - Glen Mills PA

Assignee:

Sunoco, Inc. (RM) - Philadelphia PA

International Classification:

C07C 266

US Classification:

585448, 585467

Abstract:

A zeolite-catalyzed cumene synthesis process in which benzene and propylene feedstocks are pre-treated to remove catalyst poisons. The benzene feedstock is pre-treated under pressure by contact with a âhotâ clay bed at a temperature of about 200 to 500Â C. , followed by distillation of the benzene feedstock to separate the benzene from the higher molecular weight materials formed from olefinic poisons during the hot clay treatment. The benzene feed is also subjected to a âcoldâ clay treatment wherein the benzene distillate is contacted with an ambient-temperature clay. The propylene feedstock is pre-treated by contact with an alumina to remove trace sodium compounds and moisture, a molecular sieve to remove moisture, and two modified aluminas to remove catalyst poisons. The pre-treated propylene and benzene feedstocks are then reacted in the presence of a zeolite catalyst to form cumene without causing rapid degradation of the catalysts activity.

US Patent:

20040192986, Sep 30, 2004

Filed:

Mar 26, 2003

Appl. No.:

10/401011

Inventors:

Albert Wu - Medford NJ, US
James Thompson - Pittsburgh PA, US

International Classification:

C07C002/64
C07C015/067

US Classification:

585/449000

Abstract:

Method of removing sulfur compounds from olefinic hydrocarbons by contacting with nickel-based sorbents. The method provides for the removal of heavy sulfur compounds including disulfides and mercaptans from pre-treated olefinic hydrocarbon feedstocks used in cumene synthesis to improve the life and efficiency of catalysts used in the cumene manufacturing process.

US Patent:

53248651, Jun 28, 1994

Filed:

Feb 22, 1993

Appl. No.:

8/020964

Inventors:

James H. Beech - Wilmington DE
Douglas Miller - Yardley PA
Jorge L. Soto - Cranbury NJ
James A. Stoos - Blackwood NJ
Albert H. Wu - Medford NJ

Assignee:

Mobil Oil Corporation - Fairfax VA

International Classification:

C07C 4105
C07C 4106

US Classification:

568695

Abstract:

A process for production of diisopropyl ether by conversion of hydrocarbon feedstock containing propene, propane and C. sub. 2 - light gas components, including the steps of: optionally, prefractionating fresh feedstock containing propene, propane and C. sub. 2 - light gas components to provide a reactor feedstream rich in propene; contacting the feedstock and water in a catalytic reactor with acidic catalyst under olefin hydration and etherification conditions; and recovering from the catalytic reactor a liquid reactor effluent stream containing diisopropyl ether, isopropanol, water, unreacted propene, propane and C. sub. 2 - light gas components. Improved operation is achieved by separating the liquid effluent stream in a vertical stripper column; recovering an overhead vapor stream containing propene, propane and C. sub. 2 - light gas components from the stripper column; cooling the overhead vapor stream to provide a reflux stream rich in condensed propene and propane; removing the C. sub. 2 - light gas components from condensed; recycling the reflux stream to an upper contact portion of the stripper column; and recovering a predominantly C3 recycle stream from the upper contact portion of the stripper column.

US Patent:

59861487, Nov 16, 1999

Filed:

Aug 2, 1993

Appl. No.:

8/101111

Inventors:

James H. Beech - Wilmington DE
Douglas Miller - Yardley PA
Jorge Luis Soto - Cranbury NJ
James A. Stoos - Beaumont TX
Albert H. Wu - Medford NJ

Assignee:

Mobil Oil Corporation - Fairfax VA

International Classification:

C07C 4100

US Classification:

568694

Abstract:

An improved process for production of diisopropyl ether by conversion of hydrocarbon feedstock containing propene, propane and C. sub. 2 -- light gas components. The overall process steps include, (optionally) prefractionating fresh feedstock containing propene, propane and C. sub. 2 -- light gas components to provide a reactor feedstream rich in propene; contacting the feedstock and water in a catalytic reactor with acidic catalyst under olefin hydration and etherification conditions; and recovering from the catalytic reactor a liquid reactor effluent stream containing diisopropyl ether, isopropanol, water, unreacted propene, propane, oligomer and C. sub. 2 -- light gas components. DIPE product containing C. sub. 6 + oligomer is recovered by separating the liquid effluent stream in a stripper column, and extracting the DIPE-rich liquid with water.