Nabil M Rizkalla from 525 Ocean Blvd, West End, NJ 07740, age 83, Phone: (732)2226013

Principal Research Chemist

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Location:

New York, NY

Industry:

Chemicals

Work:

Scientific Design Company, Inc.
Principal Research Chemist

Education:

Columbia University In the City of New York 1979 - 1984
Columbia University In the City of New York;;1979 – 1984;

Nabil Rizkalla

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Location:

New York, NY

Industry:

Chemicals

Nabil Rizkalla

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Us Patents

Ethylene Oxide Catalyst
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US Patent:

6762311, Jul 13, 2004
Filed:

Nov 13, 2001
Appl. No.:

10/056710
Inventors:

Nabil Rizkalla - Rivervale NJ
Serguei Pak - Maywood NJ
Andrew D. Schmitz - Rutherford NJ
Assignee:

Scientific Design Co., Ltd. - Little Ferry NJ
International Classification:

C07D30110
US Classification:

549534, 549536, 502216, 502217, 502218, 502224, 502344, 502347
Abstract:

A silver catalyst for ethylene oxidation to ethylene oxide is provided containing a promoter combination consisting of critical amounts of an alkali metal component and a sulfur component, the catalyst being essentially free of rhenium and transition metal components; optionally the catalyst contains a fluorine component.

Oxidation Process And Catalyst
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US Patent:

6939979, Sep 6, 2005
Filed:

Nov 10, 2003
Appl. No.:

10/714378
Inventors:

Nabil Rizkalla - Riverdale NJ, US
Vijay S. Bhise - North Caldwell NJ, US
Assignee:

Scientific Design Co., Inc. - Little Ferry NJ
International Classification:

C07D301/10
US Classification:

549533
Abstract:

Ethylene is oxidized by contact at oxidizing conditions with an admixture of a solid particulate catalyst and a solid particulate alkali metal treated inert.

Process For Initiating A Highly Selective Ethylene Oxide Catalyst
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US Patent:

7553980, Jun 30, 2009
Filed:

Sep 26, 2007
Appl. No.:

11/861736
Inventors:

Nabil Rizkalla - Rivervale NJ, US
Barry Jay Billig - Irvington NY, US
Norma B. Castagnola - East Windsor NJ, US
Assignee:

SD Lizenzverwertungsgesellschaft mbH & Co. KG - Munich
International Classification:

C07D 301/10
US Classification:

549536, 549537, 502415
Abstract:

A process for initiating a highly selective ethylene oxide catalyst is provided in which the highly selective ethylene oxide catalyst is operated first as a ‘standard’ Ag-based catalyst (e. g. , a catalyst that contains only silver and alkali metal, especially cesium). Moreover, the inventive initiation procedure is more efficient when the concentration of carbon dioxide in the feed is higher than 6 vol. %, and even more efficient when the concentration of carbon dioxide in the feed is higher than 10 vol. %, of the feed mixture during the initiation period.

Recovery Of Rhenium
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US Patent:

7763096, Jul 27, 2010
Filed:

May 6, 2008
Appl. No.:

12/115779
Inventors:

Nabil Rizkalla - Rivervale NJ, US
Andrzej Rokicki - Mountain Lakes NJ, US
Assignee:

SD Lizenzverwertungsgesellschaft mbH & Co. KG - Munich
International Classification:

C22B 11/00
US Classification:

75721, 75744, 423 27
Abstract:

The present invention relates to a method for recovering rhenium from an ethylene oxide catalyst containing rhenium and at least silver on a solid support, wherein at least a substantial portion of the rhenium present in the catalyst is extracted by intimate contact of the catalyst with one or more polar non-acidic organic solvents substantially free of water such that a rhenium-containing solution is formed containing the polar non-acidic organic solvent and extracted rhenium, the polar non-acidic organic solvent containing one or more oxygen, nitrogen, and/or halogen atoms in its molecular structure.

Ethylene Oxide Production Using Fixed Moderator Concentration
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US Patent:

7803957, Sep 28, 2010
Filed:

Sep 11, 2007
Appl. No.:

11/853473
Inventors:

Nabil Rizkalla - Rivervale NJ, US
Howard Sachs - Bronx NY, US
Mansoor Firoz Husain - North Brunswick NJ, US
Christian J. Gueckel - Paramus NJ, US
Andrzej Rokicki - Mountain Lakes NJ, US
Assignee:

SD Lizenzverwertungsgesellschaft mbH & Co. KG - Munich
International Classification:

C07D 301/10
US Classification:

549536
Abstract:

A method for controlling ethylene oxidation uses ethylene and oxygen, in conjunction with a silver based catalyst, a moderator and a co-moderator, to form ethylene oxide. When controlling the ethylene oxidation reaction, the moderator concentration is maintained constant within a comparatively narrow operative concentration range and the co-moderator concentration is varied within a comparatively wider operative concentration range, to optimize a catalyst property such as the catalyst activity and/or the catalyst selectivity.

Process For Preparation Of A Catalyst Carrier
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US Patent:

8318627, Nov 27, 2012
Filed:

Aug 10, 2005
Appl. No.:

11/201253
Inventors:

Nabil Rizkalla - River Vale NJ, US
Assignee:

SD Lizenzverwertungsgesellschaft mbH & Co. KG - Munich
International Classification:

B01J 21/00
B01J 23/00
B01J 25/00
B01J 29/00
B01J 31/00
B01J 23/08
B01J 20/00
US Classification:

502150, 502100, 502300, 502355, 502414
Abstract:

This invention relates to catalyst carriers to be used as supports for metal and metal oxide catalyst components of use in a variety of chemical reactions. More specifically, the invention provides a process of formulating a low surface area alpha alumina carrier that is suitable as a support for silver and the use of such catalyst in chemical reactions, especially the epoxidation of ethylene to ethylene oxide. A precursor for a catalyst support comprises an admixture of an alpha alumina and/or a transition alumina; a binder; and either a solid blowing agent which expands, or propels a gas upon the application of sufficient heat, and optionally contains talc and/or water soluble titanium compound.

Process For Initiating A Highly Selective Ethylene Oxide Catalyst
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US Patent:

8487123, Jul 16, 2013
Filed:

Dec 23, 2010
Appl. No.:

12/977549
Inventors:

Nabil Rizkalla - Rivervale NJ, US
Norma B. Castagnola - East Windsor NJ, US
Girish Desai - East Brunswick NJ, US
Assignee:

Scientific Design Company, Inc. - Little Ferry NJ
International Classification:

C07D 301/03
US Classification:

549536, 549537
Abstract:

A start-up process for epoxidation of ethylene is provided. The process includes initiating an epoxidation reaction by reacting a feed gas composition in the presence of an epoxidation catalyst at a first temperature of about 180 C. to about 210 C. The first temperature is increased to a second temperature of about 230 C. to about 290 C. , over a time period of about 6 hours to about 50 hours, while simultaneously adding a sufficient concentration of moderator so that the amount of moderator adsorbed on the catalyst after achieving the second temperature is from about 10 to about 50 g/mof catalyst. The second temperature is maintained for about 50 hours to about 350 hours, while regulating the feed gas composition to contain about 0. 5% to about 25% CO. The second temperature is decreased to a third temperature, while simultaneously increasing moderator concentration to a level greater than the sufficient concentration.

Process For Preparation Of Catalyst Carrier And Its Use In Catalyst Preparation
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US Patent:

20070037991, Feb 15, 2007
Filed:

Aug 10, 2005
Appl. No.:

11/201030
Inventors:

Nabil Rizkalla - Riverdale NJ, US
International Classification:

B01J 21/00
C07D 301/06
US Classification:

549533000, 502439000, 502263000
Abstract:

This invention relates to catalyst carriers to be used as supports for metal and metal oxide catalyst components of use in a variety of chemical reactions. More specifically, the invention provides a process of formulating an alpha alumina carrier that is suitable as a support for silver and the use of such catalyst in chemical reactions, especially the epoxidation of ethylene to ethylene oxide. The composition comprises at least one hydrated precursor of alpha alumina; an optional alpha alumina; and a binder. The composition is substantially free of seeding particles.