Patents by Inventor Michael Hryniszak
Michael Hryniszak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7868215Abstract: A process for producing cumene is provided which comprises the step of contacting benzene and propylene under at least partial liquid phase alkylating conditions with a particulate molecular sieve alkylation catalyst, wherein the particles of said alkylation catalyst have a surface to volume ratio of about 80 to less than 200 inch?1.Type: GrantFiled: November 10, 2009Date of Patent: January 11, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ajit B. Dandekar, Michael Hryniszak, David Lawrence Stern
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Patent number: 7737313Abstract: A catalyst composition comprises (a) a MCM-22 family molecular sieve; and (b) a binder, wherein the MCM-22 family molecular sieve is characterized by an average crystal agglomerate size of less than or equal to 16 microns. The catalyst composition may further have a second molecular sieve having a Constraint Index of less than 12, e.g., less than 2. Examples of molecular sieve useful for this disclosure are a MCM-22 family molecular sieve, zeolite Y, and zeolite Beta. The catalyst composition may be used for the process of alkylation or transalkylation of an alkylatable aromatic compound with an alkylating agent.Type: GrantFiled: December 21, 2006Date of Patent: June 15, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Christine N. Elia, Frederick Y. Lo, Michael C. Clark, C. Morris Smith, Michael Hryniszak, Mohan Kalyanaraman
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Publication number: 20100056835Abstract: A process for producing cumene is provided which comprises the step of contacting benzene and propylene under at least partial liquid phase alkylating conditions with a particulate molecular sieve alkylation catalyst, wherein the particles of said alkylation catalyst have a surface to volume ratio of about 80 to less than 200 inch?1.Type: ApplicationFiled: November 10, 2009Publication date: March 4, 2010Inventors: Ajit B. Dandekar, Michael Hryniszak, David Lawrence Stern
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Patent number: 7671248Abstract: A process for producing sec-butylbenzene comprises contacting a feed comprising benzene and ethylene under alkylation conditions with catalyst comprising (i) a molecular sieve having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstrom and (ii) at least one metal selected from Group 10 of the Periodic Table of Elements to produce an alkylation effluent comprising sec-butylbenzene.Type: GrantFiled: August 5, 2005Date of Patent: March 2, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ajit B. Dandekar, John P. McWilliams, Thomas Francis Degnan, Jr., Michael Hryniszak
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Patent number: 7638668Abstract: A process for producing cumene is provided which comprises the step of contacting benzene and propylene under at least partial liquid phase alkylating conditions with a particulate molecular sieve alkylation catalyst, wherein the particles of said alkylation catalyst have a surface to volume ratio of about 80 to less than 200 inch?1.Type: GrantFiled: October 22, 2007Date of Patent: December 29, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ajit B. Dandekar, Michael Hryniszak, David Lawrence Stern
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Patent number: 7569739Abstract: The present invention provides a process for producing an alkylaromatic compound comprising the step of contacting an alkylatable aromatic compound with an alkylating agent under alkylation conditions in the presence of a alkylation catalyst comprising phosphorus and a porous crystalline inorganic oxide material having an X-ray diffraction pattern including the d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstrom.Type: GrantFiled: October 17, 2007Date of Patent: August 4, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ajit B. Dandekar, John P. McWilliams, Thomas Francis Degnan, Michael Hryniszak, Donald J. Klocke, Wieslaw Jerzy Roth
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Publication number: 20080154081Abstract: A catalyst composition comprises (a) a MCM-22 family molecular sieve; and (b) a binder, wherein the MCM-22 family molecular sieve is characterized by an average crystal agglomerate size of less than or equal to 16 microns. The catalyst composition may further have a second molecular sieve having a Constraint Index of less than 12, e.g., less than 2. Examples of molecular sieve useful for this disclosure are a MCM-22 family molecular sieve, zeolite Y, and zeolite Beta. The catalyst composition may be used for the process of alkylation or transalkylation of an alkylatable aromatic compound with an alkylating agent.Type: ApplicationFiled: December 21, 2006Publication date: June 26, 2008Inventors: Christine N. Elia, Frederick Y. Lo, Michael C. Clark, Morris C. Smith, Michael Hryniszak, Mohan Kalyanaraman
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Publication number: 20080154082Abstract: A process for producing sec-butylbenzene comprises contacting a feed comprising benzene and ethylene under alkylation conditions with catalyst comprising (i) a molecular sieve having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstrom and (ii) at least one metal selected from Group 10 of the Periodic Table of Elements to produce an alkylation effluent comprising sec-butylbenzene.Type: ApplicationFiled: August 5, 2005Publication date: June 26, 2008Applicant: EXXONMOBIL CHEMICAL PATENTS INC.Inventors: Ajit B. Dandekar, John P. McWilliams, Thomas Francis Degnan, Michael Hryniszak
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Publication number: 20080045765Abstract: A process for producing cumene is provided which comprises the step of contacting benzene and propylene under at least partial liquid phase alkylating conditions with a particulate molecular sieve alkylation catalyst, wherein the particles of said alkylation catalyst have a surface to volume ratio of about 80 to less than 200 inch?1.Type: ApplicationFiled: October 22, 2007Publication date: February 21, 2008Inventors: Ajit Dandekar, Michael Hryniszak, David Stern
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Publication number: 20080039668Abstract: The present invention provides a process for producing an alkylaromatic compound comprising the step of contacting an alkylatable aromatic compound with an alkylating agent under alkylation conditions in the presence of a alkylation catalyst comprising phosphorus and a porous crystalline inorganic oxide material having an X-ray diffraction pattern including the d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstrom.Type: ApplicationFiled: October 17, 2007Publication date: February 14, 2008Inventors: Ajit Dandekar, John McWilliams, Thomas Degnan, Michael Hryniszak, Donald Klocke, Wieslaw Roth
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Patent number: 7297829Abstract: The present invention provides a process for producing an alkylaromatic compound comprising the step of contacting an alkylatable aromatic compound with an alkylating agent under alkylation conditions in the presence of a alkylation catalyst comprising phosphorus and a porous crystalline inorganic oxide material having an X-ray diffraction pattern including the d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstrom.Type: GrantFiled: May 13, 2005Date of Patent: November 20, 2007Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ajit B. Dandekar, John P. McWilliams, Thomas Francis Degnan, Michael Hryniszak, Donald J. Klocke, Wieslaw Jerzy Roth
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Patent number: 7038100Abstract: The present invention provides a process for producing an alkylaromatic compound comprising the step of contacting an alkylatable aromatic compound with an alkylating agent under alkylation conditions in the presence of a alkylation catalyst comprising phosphorus and a porous crystalline inorganic oxide material having an X-ray diffraction pattern including the d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstrom.Type: GrantFiled: April 30, 2001Date of Patent: May 2, 2006Assignee: ExxonMobil Chemical Patents, Inc.Inventors: Ajit B. Dandekar, John P. McWilliams, Thomas Francis Degnan, Michael Hryniszak, Donald J. Klocke, Wieslaw Jerzy Roth
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Patent number: 7019185Abstract: In a method for producing monoalkylated aromatic compounds, an aromatic feed is contacted with an alkylating agent in the presence of a catalyst comprising a molecular sieve having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07, and 3.42±0.07 Angstrom. The catalyst also contains at least one metal cation selected from Groups 1–4 and 7–16 of the Periodic Table of Elements, wherein the metal cation is present in an amount of at least 0.5% by weight of the catalyst, whereby selectivity of the catalyst to produce monoalkylates over polyalkylates is improved as compared with the identical catalyst but without the metal cation present.Type: GrantFiled: December 6, 2002Date of Patent: March 28, 2006Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ajit Bhaskar Dandekar, John P. McWilliams, Thomas Francis Degnan, Jr., Michael Hryniszak
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Publication number: 20050209493Abstract: The present invention provides a process for producing an alkylaromatic compound comprising the step of contacting an alkylatable aromatic compound with an alkylating agent under alkylation conditions in the presence of a alkylation catalyst comprising phosphorus and a porous crystalline inorganic oxide material having an X-ray diffraction pattern including the d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstrom.Type: ApplicationFiled: May 13, 2005Publication date: September 22, 2005Inventors: Ajit Dandekar, John McWilliams, Thomas Degnan, Michael Hryniszak, Donald Klocke, Wieslaw Roth
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Publication number: 20050187416Abstract: A process for producing cumene is provided which comprises the step of contacting benzene and propylene under at least partial liquid phase alkylating conditions with a particulate molecular sieve alkylation catalyst, wherein the particles of said alkylation catalyst have a surface to volume ratio of about 80 to less than 200 inch?1.Type: ApplicationFiled: March 24, 2005Publication date: August 25, 2005Inventors: Ajit Dandekar, Michael Hryniszak, David Stern
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Patent number: 6888037Abstract: A process for producing cumene is provided which comprises the step of contacting benzene and propylene under at least partial liquid phase alkylating conditions with a particulate molecular sieve alkylation catalyst, wherein the particles of said alkylation catalyst have a surface to volume ratio of about 80 to less than 200 inch?1.Type: GrantFiled: December 13, 2002Date of Patent: May 3, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ajit B. Dandekar, Michael Hryniszak, David Lawrence Stern
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Patent number: 6878654Abstract: The present invention provides a process for regenerating a spent aromatics alkylation or transalkylation catalyst comprising a molecular sieve by contacting the spent catalyst with an oxygen-containing gas at a temperature of about 120 to about 600° C. and then contacting the catalyst with an aqueous medium, such as an ammonium nitrate solution, an ammonium carbonate solution or an acid solution.Type: GrantFiled: September 13, 2002Date of Patent: April 12, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ajit B. Dandekar, Michael Hryniszak, Jeffrey S. Beck, David L. Stern, Kathleen M. Keville
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Patent number: 6781025Abstract: The present invention provides a process for regenerating a spent aromatics alkylation or transalkylation catalyst comprising a molecular sieve by contacting the spent catalyst with an oxygen-containing gas at a temperature of about 120 to about 600° C. and then contacting the catalyst with an aqueous medium, such as an ammonium nitrate solution, an ammonium carbonate solution or an acetic acid solution.Type: GrantFiled: July 11, 2001Date of Patent: August 24, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ajit B Dandekar, Michael Hryniszak, David Lawrence Stern, Jeffrey Scott Beck
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Publication number: 20040111001Abstract: In a method for producing monoalkylated aromatic compounds, an aromatic feed is contacted with an alkylating agent in the presence of a catalyst comprising a molecular sieve having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07, and 3.42±0.07 Angstrom. The catalyst also contains at least one metal cation selected from Groups 1-4 and 7-16 of the Periodic Table of Elements, wherein the metal cation is present in an amount of at least 0.5% by weight of the catalyst, whereby selectivity of the catalyst to produce monoalkylates over polyalkylates is improved as compared with the identical catalyst but without the metal cation present.Type: ApplicationFiled: December 6, 2002Publication date: June 10, 2004Inventors: Ajit Bhaskar Dandekar, John P. McWilliams, Thomas Francis Degnan, Michael Hryniszak
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Publication number: 20030092949Abstract: A process for producing cumene is provided which comprises the step of contacting benzene and propylene under at least partial liquid phase alkylating conditions with a particulate molecular sieve alkylation catalyst, wherein the particles of said alkylation catalyst have a surface to volume ratio of about 80 to less than 200 inch−1.Type: ApplicationFiled: December 13, 2002Publication date: May 15, 2003Inventors: Ajit B. Dandekar, Michael Hryniszak, David Lawrence Stern