Patents by Inventor Richard T. Gajek
Richard T. Gajek 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: 6440886Abstract: There is disclosed a new form of zeolite beta which shows substantially greater stability and greater catalyst lifetime when used in the alkylation and transalkylation of aromatic compounds. The new, surface-modified zeolite beta is characterized by having surface aluminum 2p binding energies, as measured by X-ray photoelectron spectroscopy, of at least 74.8 electron volts. This surface-modified zeolite beta is prepared by treating an as synthesized and templated zeolite beta with an acid at a pH between about 0 and about 2 at a temperature up to about 125° C. for a time sufficient to modify the chemical environment of the surface aluminum atom without bringing about dealumination of the zeolite beta, then calcining the acid-treated templated material at 550-700° C. to remove the template.Type: GrantFiled: November 3, 2000Date of Patent: August 27, 2002Assignee: UOP LLCInventors: Gregory J. Gajda, Richard T. Gajek
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Patent number: 6162416Abstract: There is disclosed a new form of zeolite beta which shows substantially greater stability and greater catalyst lifetime when used in the alkylation and transalkylation of aromatic compounds. The new, surface-modified zeolite beta is characterized by having surface aluminum 2p binding energies, as measured by X-ray photoelectron spectroscopy, of at least 74.8 electron volts. This surface-modified zeolite beta is prepared by treating an as synthesized and templated zeolite beta with an acid at a pH between about 0 and about 2 at a temperature up to about 125.degree. C. for a time sufficient to modify the chemical environment of the surface aluminum atom without bringing about dealumination of the zeolite beta, then calcining the acid-treated templated material at 550-700.degree. C. to remove the template.Type: GrantFiled: February 24, 1999Date of Patent: December 19, 2000Assignee: UOP LLCInventors: Gregory J. Gajda, Richard T. Gajek
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Patent number: 5980859Abstract: This invention relates to a novel zeolite which has the crystal structure of zeolite beta. The novel zeolite SN-beta has a unique infrared absorbance spectrum, shows enhanced activity for transalkylation of di-isopropyl-benzene and shows less deactivation for cumene synthesis. The zeolite beta is prepared by taking an as-synthesized zeolite beta, steam treating it and then ammonium ion treating it to give a zeolite SN-beta with enhanced catalytic properties.Type: GrantFiled: September 3, 1996Date of Patent: November 9, 1999Assignee: UOP LLCInventors: Gregory J. Gajda, Richard T. Gajek
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Patent number: 5723710Abstract: There is disclosed a new form of zeolite beta which shows substantially greater stability and greater catalyst lifetime when used in the alkylation and transalkylation of aromatic compounds. The new, surface-modified zeolite beta is characterized by having surface aluminum 2p binding energies as measured by X-ray photoelectron spectroscopy, of at least 74.8 electron volts. This surface-modified zeolite beta is prepared by treating a templated zeolite beta with an acid at a pH between about 0 and about 2 and a temperature up to about 125.degree. C. for a time sufficient to modify the chemical environment of the surface aluminum atom without bringing about dealumination of the zeolite beta.Type: GrantFiled: July 12, 1996Date of Patent: March 3, 1998Assignee: UOPInventors: Gregory J. Gajda, Richard T. Gajek
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Patent number: 5522984Abstract: This invention relates to a novel zeolite which has the crystal structure of zeolite beta. The novel zeolite SN-beta has a unique infrared absorbance spectrum, shows enhanced activity for transalkylation of di-isopropyl-benzene and shows less deactivation for cumene synthesis. The zeolite beta is prepared by taking an as-synthesized zeolite beta, steam treating it and then ammonium ion treating it to give a zeolite SN-beta with enhanced catalytic properties.Type: GrantFiled: May 30, 1995Date of Patent: June 4, 1996Assignee: UOPInventors: Gregory J. Gajda, Richard T. Gajek
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Patent number: 5114563Abstract: The catalytic conversion of hydrocarbon feedstocks is affected under effective conversion process conditions in the presence of silicoaluminophosphate-based catalyst compositions.Type: GrantFiled: November 27, 1990Date of Patent: May 19, 1992Assignee: UOPInventors: Brent M. Lok, Celeste A. Messina, Robert L. Patton, Richard T. Gajek, Thomas R. Cannan, Edith M. Flanigen
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Patent number: 5057295Abstract: Molecular sieve compositions having three-dimensional microporous framework structures of BO.sub.2, AlO.sub.2, PO.sub.2 and SiO.sub.2 tetrahedral oxide units are disclosed. These molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:mR:(B.sub.w Al.sub.x P.sub.y Si.sub.z)O.sub.2wherein "R" represents at least one organic templating agent present in the intracrystalline port system; "m" represents the molar amount of "R" present per mole of (B.sub.w Al.sub.x P.sub.y Si.sub.z)O.sub.2 ; and "w", "x", "y" and "z" represent the mole fraction of boron, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. Their use as adsorbents, catalysts, etc. is also disclosed.Type: GrantFiled: March 28, 1986Date of Patent: October 15, 1991Assignee: UOPInventors: Edith M. Flanigen, Richard T. Gajek, Brent M. T. Lok, Robert L. Patton, Stephen T. Wilson
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Patent number: 4952383Abstract: Molecular sieves having three-dimensional microporous framework structures of BO.sub.2, AlO.sub.2 and PO.sub.2 tetrahedral units are disclosed. These molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:mR: (B.sub.x Al.sub.y P.sub.z)O.sub.2wherein "R" represents at least one organic templating agent present in the intracrystalline pore system; "m" represents the molar amount of "R" present per mole of (B.sub.x Al.sub.y P.sub.z)O.sub.2 ; and "x", "y" and "z" represent the mole fractions of boron, aluminum and phosphorus, respectively, present as tetrahedral oxides. The use of these molecular sieves as adsorbents, catalysts etc. is also disclosed.Type: GrantFiled: March 24, 1987Date of Patent: August 28, 1990Assignee: UOPInventors: Edith M. Flanigen, Brent M. T. Lok, Robert L. Patton, Stephen T. Wilson, Richard T. Gajek
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Patent number: 4861739Abstract: The invention involves composite structures of multiple phases, at least two of which are inorganic crystalline compositions that are contiguous and have a common crystal framework and structure, and at least one of them contains phosphorus and aluminum atoms as part of its crystalline framework structure; and to processes for making the same. It is desired that each phase has a microporous molecular sieve structure. The process involves the growth of a crystalline structure constituting such a phase in the presence of crystals of another of such a phase. Preferably, the process involves a hydrothermal crystallization treatment of the precursors to such phase.Type: GrantFiled: June 4, 1987Date of Patent: August 29, 1989Assignee: UOPInventors: Regis J. Pellet, Peter K. Coughlin, Albert R. Springer, Richard T. Gajek
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Patent number: 4473663Abstract: A novel crystalline aluminophosphate composition having a unique crystal structure.Type: GrantFiled: March 31, 1983Date of Patent: September 25, 1984Assignee: Union Carbide CorporationInventors: Robert L. Patton, Richard T. Gajek
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Patent number: 4440871Abstract: A novel class of crystalline microporous silicoaluminophosphates is synthesized by hydrothermal crystallization of silicoaluminophosphate gels containing a molecular structure-forming templating agent. The class comprises a number of distinct species, each with a unique crystal structure. The compositions exhibit properties somewhat analogous to zeolitic molecular sieves which render them useful as adsorbent or catalysts in chemical reactions such as hydrocarbon conversions.Type: GrantFiled: July 26, 1982Date of Patent: April 3, 1984Assignee: Union Carbide CorporationInventors: Brent M. Lok, Celeste A. Messina, Robert L. Patton, Richard T. Gajek, Thomas R. Cannan, Edith M. Flanigen