Patents by Inventor Brent M. Lok
Brent M. Lok 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: 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: 4940570Abstract: Molecular sieve compositions having three-dimensional microporous framework structures of BeO.sub.2, AlO.sub.2 and PO.sub.2 tetrahedral oxide units are disclosed. These molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:mR:(Be.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 (Be.sub.x Al.sub.y P.sub.z)O.sub.2 ; and "x", "y" and "z" represent the mole fractions of beryllium, aluminum and phosphorus, respectively, present as tetrahedral oxides. Their use as adsorbents, catalysts, etc. is also disclosed.Type: GrantFiled: March 3, 1986Date of Patent: July 10, 1990Assignee: UOPInventors: Edith M. Flanigen, Brent M. Lok, Robert L. Patton, Stephen T. Wilson
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Patent number: 4898660Abstract: A novel family of crystalline, microporus aluminophosphate compositions is synthesized by hydrothermal crystallization at elevated temperatures of aluminophosphate gels containing a molecular structure forming template. The family comprises a number of distinct species, each with a unique crystal structure. Calcination removes volatile extraneous matter from the intracrystalline void space and yields microporus crystalline adsorbents with uniform pores, the dimensions of which vary, among the individual species, from about 3A to 10A diameter. The composition exhibit properties somewhat analogous to zeolitic molecular sieves which render them useful as catalysts or catalyst bases in chemical reactions such as hydrocarbon conversions.Type: GrantFiled: October 20, 1983Date of Patent: February 6, 1990Assignee: Union Carbide CorporationInventors: Stephen T. Wilson, Brent M. Lok, Edith M. Flanigen
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Patent number: 4857288Abstract: Novel crystalline aluminosilicate composition denominated LZ-135 and having uniform pore diameters of approximately 4.3 Angstroms is prepared hydrothermally from a reaction mixture containing as essential reagents, water, an alkali or alkaline earth oxide, alumina, silica and as the templating agent a mixture of the ion species tetramethylammonium ions and tetraethylammonium.Type: GrantFiled: May 15, 1987Date of Patent: August 15, 1989Assignee: UOPInventors: Bonita K. Marcus, Brent M. Lok
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Patent number: 4846956Abstract: Crystalline molecular sieves having three-dimensional microporous framework structures of MnO.sub.2, AlO.sub.2, SiO.sub.2 and PO.sub.2 tetrahedral oxide units are disclosed. These molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:mR: (Mn.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 pore system; "m" represents the molar amount of "R" present per mole of (Mn.sub.w Al.sub.x P.sub.y Si.sub.z)O.sub.2 ; and "w", "x", "y" and "z" represent the mole fractions of manganese, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. Their use as adsorbents, catalysts, etc. is also disclosed.Type: GrantFiled: September 28, 1988Date of Patent: July 11, 1989Assignee: UOPInventors: Brent M. Lok, Bonita K. Marcus, Edith M. Flanigen
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Patent number: 4842836Abstract: A novel crystalline aluminosilicate composition denominated "zeolite LZ-133" or simply "LZ-133" and having uniform pore dimensions of approximately 4.3 Angstroms is prepared hydrothermally from a reaction mixture containing as essential reagents, water, alkali or alkaline earth metal oxide, alumina, silica and a quaternary ammonium compound.Type: GrantFiled: March 24, 1986Date of Patent: June 27, 1989Assignee: UOPInventors: Brent M. Lok, Thomas R. Cannan, Edith M. Flanigen
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Patent number: 4824554Abstract: Crystalline molecular sieves having three-dimensional microporous framework structures of CoO.sub.2, AlO.sub.2, SiO.sub.2, PO.sub.2 and tetrahedral units are disclosed. These molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:mR: (Co.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 pore system; "m" represents the molar amount of "R" present per mole of (Co.sub.w Al.sub.x P.sub.y Si.sub.z)O.sub.2 ; and "w", "x", "y" and "z" represent the mole fractions of cobalt, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. Their use as adsorbents, catalysts, etc. is also disclosed.Type: GrantFiled: January 28, 1988Date of Patent: April 25, 1989Assignee: UOPInventors: Brent M. Lok, Bonita K. Marcus, Edith M. Flanigen
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Patent number: 4793984Abstract: Crystalline molecular sieves having three-dimensional microporous framework structures of ELO.sub.2, AlO.sub.2, SiO.sub.2 and PO.sub.2 framework oxide units are disclosed. The molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:mR: (EL.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 pore system: "m" represents the molar amount of "R" present per mole of (El.sub.w Al.sub.x P.sub.y Si.sub.z)O.sub.2 ; "EL" represents at least one element capable of forming a framework oxide unit; and "w", "x", "y" and "z" represent the mole fractions of element(s) "EL", aluminum, phosphorus and silicon, respectively, present as framework oxides. Their use as adsorbents, catalysts, etc. is also disclosed.Type: GrantFiled: April 13, 1984Date of Patent: December 27, 1988Assignee: Union Carbide CorporationInventors: Brent M. Lok, Bonita K. Marcus, Lawrence D. Vail, Edith M. Flanigen, Robert L. Patton, Stephen T. Wilson
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Patent number: 4786418Abstract: In the process for removing organic impurity constituents from aqueous media by adsorbing same on an organophilic molecular sieve adsorbent, followed by regeneration of the adsorbent by contact with an oxidant, such as hydrogen peroxide, whereby the organic adsorbate is converted to innocuous materials, principally CO.sub.2 and H.sub.2 O, the efficiency of the regeneration operation is found to be substantially improved by decreasing the pH of the regenerating medium and/or increasing the number of Bronsted acid sites in the molecular sieve adsorbent.Type: GrantFiled: March 11, 1988Date of Patent: November 22, 1988Assignee: Union Carbide CorporationInventors: Desh R. Garg, Carl J. Kjellson, Brent M. Lok, Craig H. Barkhausen
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Patent number: 4781814Abstract: Crystalline molecular sieves having three-dimensional microporous framework structure of MO.sub.2, AlO.sub.2, and PO.sub.2 tetrahedral oxide units are disclosed. These molecular sieves have an empirical chemical composition on an anhydrous basis are expressed by the formula:mR: (M.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 (M.sub.x Al.sub.y P.sub.z)O.sub.2 ; "M" represents at least two elements capable of forming framework tetrahedral oxides and selected from the group consisting of arsenic, beryllium, boron, chromium, gallium, germanium, lithium and vanadium; and "x", "y" and "z" represent the mole fractions of "M", aluminum and phosphorus, respectively, present as tetrahedral oxides. Their use as adsorbents, catalysts, etc. is disclosed. The catalyst is useful in the cracking and hydrocracking of various hydrocarbonaceous feeds.Type: GrantFiled: May 6, 1987Date of Patent: November 1, 1988Assignee: Union Carbide CorporationInventors: Edith M. Flanigen, Brent M. Lok, Robert L. Patton, Stephen T. Wilson
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Patent number: 4758419Abstract: Crystalline molecular sieves having a three-dimensional microporous framework structures of MgO.sub.2, AlO.sub.2, SiO.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:(Mg.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 pore system; "m" represents the molar amount of "R" present per mole of (Mg.sub.w Al.sub.x P.sub.y Si.sub.z)O.sub.2 ; and "w", "x", "y" and "z" represent the mole fractions of magnesium, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. Their use as adsorbents, catalysts, etc. is disclosed.Type: GrantFiled: April 13, 1984Date of Patent: July 19, 1988Assignee: Union Carbide CorporationInventors: Brent M. Lok, Lawrence D. Vail, Edith M. Flanigen
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Patent number: 4744885Abstract: Novel class of crystalline microporous ferroaluminophosphate compositions containing as lattice constituents in addition to AlO.sub.2 and PO.sub.2 structural units, ferric and/or ferrous iron in tetrahedral coordination with oxygen atoms. These compositions are prepared hydrothermally using organic templating agents and are suitably employed as catalysts or adsorbents.Type: GrantFiled: August 19, 1985Date of Patent: May 17, 1988Assignee: Union Carbide CorporationInventors: Celeste A. Messina, Brent M. Lok, Edith M. Flanigen
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Patent number: 4744970Abstract: Crystalline molecular sieves having three-dimensional microporous framework structures of CoO.sub.2, AlO.sub.2, SiO.sub.2, PO.sub.2 and tetrahedral units are disclosed. These molecular sieves have an empirical chemical composition on an anhydrous basis expressed by the formula:mR: (Co.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 pore system; "m" represents the molar amount of "R" present per mole of (Co.sub.w Al.sub.x P.sub.y Si.sub.z)O.sub.2 ; and "w", "x", "y" and "z" represent the mole fractions of cobalt, aluminum, phosphorus and silicon, respectively, present as tetrahedral oxides. Their use as adsorbents catalysts, etc. is also disclosed.Type: GrantFiled: April 13, 1984Date of Patent: May 17, 1988Assignee: Union Carbide CorporationInventors: Brent M. Lok, Bonita K. Marcus, Edith M. Flanigen
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Patent number: 4683217Abstract: A novel class of iron-aluminum-phosphorus-silicon-oxide molecular sieves is disclosed which contain as framework constituents FeO.sub.2.sup.-, and/or FeO.sub.2.sup.-2, AlO.sub.2.sup.-, PO.sub.2.sup.+ and SiO.sub.2 tetrahedral oxide units. These compositions are prepared hydrothermally, preferably using organic templating agents and are suitably employed as adsorbents and catalysts.Type: GrantFiled: April 13, 1984Date of Patent: July 28, 1987Assignee: Union Carbide CorporationInventors: Brent M. Lok, Lawrence D. Vail, Edith M. Flanigen
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Patent number: 4569833Abstract: Described herein is a process for enhancing the hydrophobicity of crystalline molecular sieves and also crystalline molecular sieve compositions which have enhanced hydrophobic character and modified catalytic properties. The crystalline molecular sieves are contacted with a silicon tetrafluoride gas mixture at a temperature from about ambient to about 200.degree. C. to alter (1) the framework aluminum and silica content, (2) the surface characteristics, and (3) the acidic sites of the molecular sieves with resulting modification of both the adsorptive properties, i.e., enhanced hydrophobicity, and catalytic properties of the molecular sieves. The crystalline molecular sieves can further undergo ion exchange to remove any aluminum fluoride cation species such as AlF.sup.++ and AlF.sub.2.sup.+. The crystalline molecular sieve compositions of this invention are useful as selective hydrophobic adsorbents and catalysts.Type: GrantFiled: April 24, 1985Date of Patent: February 11, 1986Assignee: Union Carbide CorporationInventors: Frank P. Gortsema, Brent M. Lok
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Patent number: 4554143Abstract: Novel class of crystalline microporous ferroaluminophosphate compositions containing as lattice constituents in addition to AlO.sub.2 and PO.sub.2 structural units, ferric and/or ferrous iron in tetrahedral coordination with oxygen atoms. These compositions are prepared hydrothermally using organic templating agents and are suitably employed as catalysts or adsorbents.Type: GrantFiled: July 15, 1983Date of Patent: November 19, 1985Assignee: Union Carbide CorporationInventors: Celeste A. Messina, Brent M. Lok, Edith M. Flanigen
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Patent number: 4499315Abstract: By-product effluent streams from pyrolytic hydrocarbon cracking processes, containing monoolefins and diolefins, are treated to hydrogenate the olefins and to aromatize the aliphatics, with a catalyst comprising silicoaluminophosphates (SAPO-5, SAPO-11 etc.).Type: GrantFiled: November 15, 1983Date of Patent: February 12, 1985Assignee: Union Carbide CorporationInventors: Daniel C. Garska, Brent M. Lok
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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
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Patent number: 4385994Abstract: A novel family of crystalline, microporous aluminophosphate compositions is synthesized by hydrothermal crystallization at elevated temperatures of aluminophosphate gels containing a molecular structure forming template. The family comprises a number of distinct species, each with a unique crystal structure. Calcination removes volatile extraneous matter from the intracrystalline void space and yields microporous crystalline adsorbents with uniform pores, the dimensions of which vary, among the individual species, from about 3A to 10A diameter. The compositions represent a new class of adsorbents of the molecular sieve type, and also exhibit properties somewhat analogous to zeolitic molecular sieves which render them useful as catalysts or catalyst bases in chemical reactions such as hydrocarbon conversions.Type: GrantFiled: October 26, 1981Date of Patent: May 31, 1983Assignee: Union Carbide CorporationInventors: Stephen T. Wilson, Brent M. Lok, Edith M. Flanigen
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Patent number: 4343717Abstract: Stable, colloidal, silica sol is provided by a process which comprises vigorously mixing a slurry of calcium silicate with a dilute acid having a pK.sub.a value of less than about 8, such as sulfuric acid, and thereafter separating the sol from the insoluble precipitate of calcium salt. The process provides an inexpensive method for production of the sol as opposed to those methods which currently use sodium silicate as the starting material.Type: GrantFiled: February 8, 1980Date of Patent: August 10, 1982Assignee: Union Carbide CorporationInventor: Brent M. Lok