Patents by Inventor Lay Hwa Ong
Lay Hwa Ong 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: 10189012Abstract: A process for preparing a hydrocarbon conversion catalyst that comprises a specially made silica-alumina composition and a metal or metal compound selected from Group VIB and Group VIII metals. The silica-alumina composition is made by preparing an aqueous mixture containing aluminum sulfate followed by adding alkali metal aluminate to the mixture to enhance the pH to within specified range and then adding aluminum sulfate to the mixture to lower the pH. Then alkali metal silicate is added followed by several other pH swings to provide a mixture containing silica-alumina. The resulting mixture is treated with an alkaline solution to provide a precipitate solid that is recovered to obtain a silica-alumina composition containing of from 30 to 70% wt silica and of from 70 to 30% wt of alumina.Type: GrantFiled: December 27, 2017Date of Patent: January 29, 2019Assignee: SHELL OIL COMPANYInventors: David Allen Cooper, Sjoerd Alkema, Lay Hwa Ong, Bart Pelgrim, László Domokos, Ferry Winter
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Publication number: 20180117568Abstract: A process for preparing a hydrocarbon conversion catalyst that comprises a specially made silica-alumina composition and a metal or metal compound selected from Group VIB and Group VIII metals. The silica-alumina composition is made by preparing an aqueous mixture containing aluminum sulfate followed by adding alkali metal aluminate to the mixture to enhance the pH to within specified range and then adding aluminum sulfate to the mixture to lower the pH. Then alkali metal silicate is added followed by several other pH swings to provide a mixture containing silica-alumina. The resulting mixture is treated with an alkaline solution to provide a precipitate solid that is recovered to obtain a silica-alumina composition containing of from 30 to 70% wt silica and of from 70 to 30% wt of alumina.Type: ApplicationFiled: December 27, 2017Publication date: May 3, 2018Inventors: David Allen COOPER, Sjoerd ALKEMA, Lay Hwa ONG, Bart PELGRIM, László DOMOKOS, Ferry WINTER
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Patent number: 9861963Abstract: A process for preparing a hydrocarbon conversion catalyst that comprises a specially made silica-alumina composition and a metal or metal compound selected from Group VIB and Group VIII metals. The silica-alumina composition is made by preparing an aqueous mixture containing aluminum sulfate followed by adding alkali metal aluminate to the mixture to inhance the pH to within specified range and then adding aluminum sulfate to the mixture to lower the pH. Then alkali metal silicate is added followed by several other pH swings to provide a mixture containing silica-alumina. The resulting mixture is treated with an alkaline solution to provide a precipitate solid that is recovered to obtain a silica-alumina composition containing of from 30 to 70% wt silica and of from 70 to 30% wt of alumina.Type: GrantFiled: December 18, 2013Date of Patent: January 9, 2018Inventors: David Allen Cooper, Sjoerd Alkema, Lay Hwa Ong, Bart Pelgrim, Laszlo Domokos, Ferry Winter
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Patent number: 9340734Abstract: Disclosed is a process for the preparation of a faujasite zeolite. A starting zeolite of the faujasite structure having a silica to alumina ratio of from 4.5 to 6.5 and an alkali level of less than 1.5% wt is steam calcined to produce an intermediate zeolite. The intermediate zeolite is treated with an acidified solution having specificately defined characteristics.Type: GrantFiled: November 30, 2010Date of Patent: May 17, 2016Assignee: Shell Oil CompanyInventors: László Domokos, Wiebe Sjoerd Kijlstra, Lay Hwa Ong, Edward Julius Creyghton
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Patent number: 9308521Abstract: Process for preparing a modified zeolite Y which process comprises subjecting zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700 to 1000° C. wherein (i) the steam partial pressure is at most 0.06 bar at a temperature of from 700 to 800° C., (ii) the steam partial pressure is at most 0.08 bar at a temperature of from 800 to 850° C., (iii) the steam partial pressure is at least 0.03 bar at a temperature of from 850 to 900° C., and (iv) the steam partial pressure is at least 0.05 bar at a temperature of from 900 to 950° C. and (v) the steam partial pressure is at least 0.07 bar at a temperature of from 950 to 1000° C.Type: GrantFiled: January 16, 2014Date of Patent: April 12, 2016Assignee: PQ CORPORATIONInventors: David Allen Cooper, Cornelius Ouwehand, Laszlo Domokos, Lay Hwa Ong
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Patent number: 9174204Abstract: The invention relates to a novel catalyst based on zeolite, the production of that catalyst, and the use of the catalyst in a method for producing lower olefins from oxygenates and for oligomerizing olefins. The novel catalyst has a SiO2/Al2O3 weight ratio of 2 to 9, a BET surface of 250 to 500 m2/g, and an Na content under 200 ppm. The catalyst includes a crystalline alumosilicate zeolite and a binder. The catalyst is characterized in that the ratio of the peak heights of its IR absorption bands v=3610 cm?1±20 cm?1/v=3680 cm?1±20 cm?1 is greater than 1.8.Type: GrantFiled: January 26, 2011Date of Patent: November 3, 2015Assignee: SUD-CHEMIE IP GMBH & CO. KGInventors: Götz Burgfels, Stefan Klingelhöfer, Lay Hwa Ong, Roberta Olindo, Johannes A. Lercher, Friedrich Schmidt
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Publication number: 20140187411Abstract: A process for preparing a silica-alumina composition containing of from 30 to 70% wt silica and of from 70 to 30% wt of alumina, which process comprises (a) preparing an aqueous mixture containing aluminum sulfate and having a pH in the range of from 1.0 to 6.5; (b) adding alkali metal aluminate to the mixture obtained in step (a) to increase the pH of the mixture to within the range of from 7.1 to 12; (c) adding aluminum sulfate to the mixture obtained in step (b) to lower the pH of the mixture to within the range of from 1.5 to 6.5; (d) adding alkali metal silicate to the mixture obtained in step (c) to increase the pH of the mixture to within the range of from 6.5 to 11, (e) adding aluminum sulfate to the mixture obtained in step (d) to lower the pH of the mixture to within the range of from 1.5 to 6.Type: ApplicationFiled: December 18, 2013Publication date: July 3, 2014Applicant: PQ CorporationInventors: David Allen Cooper, Lay Hwa Ong, Ferry Winter, Laszlo Domokos, Wiebe Sjoerd Kijlstra, Sjoerd Alkema
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Publication number: 20140183098Abstract: A process for preparing a hydrocarbon conversion catalyst that comprises a specially made silica-alumina composition and a metal or metal compound selected from Group VIB and Group VIII metals. The silica-alumina composition is made by preparing an aqueous mixture containing aluminum sulfate followed by adding alkali metal aluminate to the mixture to inhance the pH to within specified range and then adding aluminum sulfate to the mixture to lower the pH. Then alkali metal silicate is added followed by several other pH swings to provide a mixture containing silica-alumina. The resulting mixture is treated with an alkaline solution to provide a precipitate solid that is recovered to obtain a silica-alumina composition containing of from 30 to 70% wt silica and of from 70 to 30% wt of alumina.Type: ApplicationFiled: December 18, 2013Publication date: July 3, 2014Applicant: Shell Oil CompanyInventors: David Allen COOPER, Sjoerd ALKEMA, Lay Hwa ONG, Bart PELGRIM, Laszlo DOMOKOS, Ferry WINTER
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Publication number: 20140135560Abstract: Process for preparing a modified zeolite Y which process comprises subjecting zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700 to 1000° C. wherein (i) the steam partial pressure is at most 0.06 bar at a temperature of from 700 to 800° C., (ii) the steam partial pressure is at most 0.08 bar at a temperature of from 800 to 850° C., (iii) the steam partial pressure is at least 0.03 bar at a temperature of from 850 to 900° C., and (iv) the steam partial pressure is at least 0.05 bar at a temperature of from 900 to 950° C. and (v) the steam partial pressure is at least 0.07 bar at a temperature of from 950 to 1000° C.Type: ApplicationFiled: January 16, 2014Publication date: May 15, 2014Applicant: PQ CORPORATIONInventors: David Allen Cooper, Cornelius Ouwehand, Laszlo Domokos, Lay Hwa Ong
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Publication number: 20130053609Abstract: The invention relates to a novel catalyst based on zeolite, the production of that catalyst, and the use of the catalyst in a method for producing lower olefins from oxygenates and for oligomerizing olefins. The novel catalyst has a SiO2/Al2O3 weight ratio of 2 to 9, a BET surface of 250 to 500 m2/g, and an Na content under 200 ppm. The catalyst includes a crystalline alumosilicate zeolite and a binder. The catalyst is characterized in that the ratio of the peak heights of its IR absorption bands v=3610 cm?1±20 cm?1/v=3680 cm?1±20 cm?1 is greater than 1.8.Type: ApplicationFiled: January 26, 2011Publication date: February 28, 2013Applicant: SUD-CHEMIE IP GMBH & CO. KGInventors: Götz Burgfels, Stefan Klingelhöfer, Lay Hwa Ong, Roberta Olindo, Johannes A. Lercher, Friedrich Schmidt
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Publication number: 20120279901Abstract: Disclosed is a process for the preparation of a faujasite zeolite. A starting zeolite of the faujasite structure having a silica to alumina ratio of from 4.5 to 6.5 and an alkali level of less than 1.5% wt is steam calcined to produce an intermediate zeolite. The intermediate zeolite is treated with an acidified solution having specificately defined characteristics.Type: ApplicationFiled: November 30, 2010Publication date: November 8, 2012Inventors: László Domokos, Wiebe Sjoerd Kijlstra, Lay Hwa Ong, Edward Julius Creyghton
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Publication number: 20100278723Abstract: Process for preparing a modified zeolite Y which process comprises subjecting zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700 to 1000° C. wherein (i) the steam partial pressure is at most 0.06 bar at a temperature of from 700 to 800° C., (ii) the steam partial pressure is at most 0.08 bar at a temperature of from 800 to 850° C. , (iii) the steam partial pressure is at least 0.03 bar at a temperature of from 850 to 900° C., and (iv) the steam partial pressure is at least 0.05 bar at a temperature of from 900 to 950° C. and (v) the steam partial pressure is at least 0.07 bar at a temperature of from 950 to 1000° C.Type: ApplicationFiled: April 28, 2010Publication date: November 4, 2010Inventors: David Allen Cooper, Cornelis Ouwehand, László Domokos, Lay Hwa Ong