Patents by Inventor László Domokos
László Domokos 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: 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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Publication number: 20170348677Abstract: The invention relates to a method for preparing a catalyst or catalyst precursor comprising a catalytically active material and a carrier material. The invention relates to a catalyst particle and catalyst precursor thereof obtainable by said method. The catalyst may be used in a process for synthesising hydrocarbons.Type: ApplicationFiled: December 21, 2015Publication date: December 7, 2017Applicant: Shell Oil CompanyInventors: Andreas KLEMT, László DOMOKOS, Frank Peter FRIEDEL, Stefan BOETTCHER, Erwin Roderick STOBBE
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Publication number: 20170182483Abstract: Process for preparing a catalyst support which process comprises a) mixing pentasil zeolite having a bulk silica to alumina molar ratio in the range of from 20 to 150 with water, a silica source and an alkali metal salt, b) extruding the mixture obtained in step (a), c) drying and calcining the extrudates obtained in step (b), d) subjecting the calcined extrudates obtained in step (c) to ion exchange to reduce the alkali metal content, and e) drying the extrudates obtained in step (d); process for preparing a catalyst by furthermore impregnating such support with platinum in an amount in the range of from 0.001 to 0.1 wt % and tin in an amount in the range of from 0.01 to 0.5 wt %, each on the basis of total catalyst; ethylbenzene dealkylation catalyst obtainable thereby and a process for dealkylation of ethylbenzene which process comprises contacting feedstock containing ethylbenzene with such catalyst.Type: ApplicationFiled: February 14, 2017Publication date: June 29, 2017Inventors: László DOMOKOS, Peter GEERINCK, Aan Hendrik KLAZINGA
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Patent number: 9662641Abstract: A catalyst composition which comprises a) a carrier which comprises at least 30 wt % of a binder selected from silica, zirconia and titania; at least 20 wt % of a pentasil zeolite, having a bulk silica to alumina ratio in the range of from 20 to 150 and being in its H+ form; and less than 10 wt % of other components, all percentages being on the basis of total carrier; b) platinum in an amount in the range of from 0.001 to 0.1 wt %, on the basis of total catalyst; and c) tin in an amount in the range of from 0.01 to 0.5 wt %, on the basis of total catalyst; its preparation and use; are provided.Type: GrantFiled: April 13, 2015Date of Patent: May 30, 2017Assignee: SHELL OIL COMPANYInventors: Johanna Jacoba Berg-Slot, László Domokos, Ingrid Maria Van Vegchel
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Patent number: 9604204Abstract: Process for preparing a catalyst support which process comprises a) mixing pentasil zeolite having a bulk silica to alumina molar ratio in the range of from 20 to 150 with water, a silica source and an alkali metal salt, b) extruding the mixture obtained in step (a), c) drying and calcining the extrudates obtained in step (b), d) subjecting the calcined extrudates obtained in step (c) to ion exchange to reduce the alkali metal content, and e) drying the extrudates obtained in step (d); process for preparing a catalyst by furthermore impregnating such support with platinum in an amount in the range of from 0.001 to 0.1 wt % and tin in an amount in the range of from 0.01 to 0.5 wt %, each on the basis of total catalyst; ethylbenzene dealkylation catalyst obtainable thereby and a process for dealkylation of ethylbenzene which process comprises contacting feedstock containing ethylbenzene with such catalyst.Type: GrantFiled: April 18, 2011Date of Patent: March 28, 2017Assignee: SHELL OIL COMPANYInventors: László Domokos, Peter Geerinck, Aan Hendrik Klazinga
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Publication number: 20160256858Abstract: A new configuration of ZSM-5 is provided whereby the crystals have a higher average silica to alumina ratio at the edges of each crystallite than in the centre as determined from a narrow slit line scan profile obtained from SEM/EDX or TEM/EDX elemental analysis. Such ZSM-5 crystals are obtained by a preparation process using L-tartaric acid. The new configuration ZSM-5 provides significantly reduced xylene losses in ethylbenzene dealkylation, especially when combined with silica as binder, and one or more hydrogenation metals selected from platinum, tin, lead, silver, copper, and nickel.Type: ApplicationFiled: February 4, 2016Publication date: September 8, 2016Inventors: László DOMOKOS, Ralph HASWELL, Hong-Xin LI
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Patent number: 9376325Abstract: A new configuration of ZSM-5 is provided whereby the crystals have a higher average silica to alumina ratio at the edges of each crystallite than in the center as determined from a narrow slit line scan profile obtained from SEM/EDX or TEM/EDX elemental analysis. Such ZSM-5 crystals are obtained by a preparation process using L-tartaric acid. The new configuration ZSM-5 provides significantly reduced xylene losses in ethylbenzene dealkylation, especially when combined with silica as binder, and one or more hydrogenation metals selected from platinum, tin, lead, silver, copper, and nickel.Type: GrantFiled: June 20, 2013Date of Patent: June 28, 2016Assignee: Shell Oil CompanyInventors: Laszlo Domokos, Ralph Haswell, Hong-Xin Li
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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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Publication number: 20160074846Abstract: Process for preparing a hydrocracking catalyst carrier which process comprises subjecting a carrier comprising an amorphous binder and zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700 to 900° C., hydrocracking catalyst carrier comprising amorphous binder and zeolite Y having a silica to alumina molar ratio of at least 10, the infrared spectrum of which catalyst has a peak at 3690 cm?1, substantially reduced peaks at 3630 cm?1 and 3565 cm?1 and no peak at 3600 cm?1, hydrocracking catalyst carrier comprising an amorphous binder and zeolite Y having a silica to alumina molar ratio of at least 10, which catalyst has an acidity as measured by exchange with perdeuterated benzene of at most 20 micromole/gram, hydrocracking catalyst derived from such carrier and hydrocracking process with the help of such catalyst.Type: ApplicationFiled: November 24, 2015Publication date: March 17, 2016Inventors: Laszlo DOMOKOS, Cornelis OUWEHAND
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Patent number: 9199228Abstract: Process of preparing a hydrocracking catalyst carrier comprising amorphous binder and 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., hydrocracking catalyst carrier comprising amorphous binder and zeolite Y having a silica to alumina molar ratio of at least 10, the infrared spectrum of which catalyst has a peak at 3690 cm?1, substantially reduced peaks at 3630 cm?1 and 3565 cm?1 and no peak at 3600 cm?1, hydrocracking catalyst carrier comprising an amorphous binder and zeolite Y having a silica to alumina molar ratio of at least 10, which catalyst has an acidity as measured by exchange with perdeuterated benzene of at most 20 micro-mole/gram, hydrocracking catalyst derived from such carrier and hydrocracking process with the help of such catalyst.Type: GrantFiled: April 15, 2010Date of Patent: December 1, 2015Assignee: Shell Oil CompanyInventors: László Domokos, Cornelis Ouwehand
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Publication number: 20150306592Abstract: A die is provided for extruding elongate particles suitable for use in catalysis. The die comprises a plurality of channels extending from an inlet to an outlet. From the inlet to the outlet each channel comprises a first section with a helical bore with a non-circular cross-section, and a second section with a cylindrical bore. The cylindrical bore of the second section which has a diameter equal or greater than that of the first section. The second section is at least twice as long as a diameter of the first section.Type: ApplicationFiled: July 8, 2015Publication date: October 29, 2015Inventors: Rene Georges Ernst BARTHEL, Maria Johanna Wilhelmina VAN WIERINGEN, Leonardus Maria VAN DER SMAN, László DOMOKOS
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Publication number: 20150217281Abstract: A catalyst composition which comprises a) a carrier which comprises at least 30 wt % of a binder selected from silica, zirconia and titania; at least 20 wt % of a pentasil zeolite, having a bulk silica to alumina ratio in the range of from 20 to 150 and being in its H+ form; and less than 10 wt % of other components, all percentages being on the basis of total carrier; b) platinum in an amount in the range of from 0.001 to 0.1 wt %, on the basis of total catalyst; and c) tin in an amount in the range of from 0.01 to 0.5 wt %, on the basis of total catalyst; its preparation and use; are provided.Type: ApplicationFiled: April 13, 2015Publication date: August 6, 2015Inventors: Johanna Jacoba BERG-SLOT, László DOMOKOS, Ingrid Maria VAN VEGCHEL
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Patent number: 9029283Abstract: A catalyst composition which comprises: a) a carrier which comprises at least 30 wt % of a binder selected from silica, zirconia and titania; at least 20 wt % of a pentasil zeolite, having a bulk silica to alumina ratio in the range of from 20 to 150 and being in its H+ form; and less than 10 wt % of other components, all percentages being on the basis of total carrier; b) platinum in an amount in the range of from 0.001 to 0.1 wt %, on the basis of total catalyst; and c) tin in an amount in the range of from 0.01 to 0.5 wt %, on the basis of total catalyst; its preparation and use; are provided.Type: GrantFiled: July 28, 2008Date of Patent: May 12, 2015Assignee: Shell Oil CompanyInventors: Johanna Jacoba Berg-Slot, László Domokos, Ingrid Maria Van Vegchel
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Patent number: 8834710Abstract: A process for starting up a hydrotreating process using a bulk metal catalyst. The process comprises the steps of providing a hydrocarbon feed stream containing less than 100 ppmw nitrogen containing species; and adding a nitrogen-containing compound to the hydrocarbon feed stream followed by contacting the resulting feed stream with the bulk metal catalyst in the presence of hydrogen and a sulfur-containing species.Type: GrantFiled: November 19, 2008Date of Patent: September 16, 2014Assignee: Shell Oil CompanyInventors: László Domokos, Hermanus Jongkind, Pieter Van Der Laan, Marcello Stefano Rigutto
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Patent number: 8835516Abstract: A process for performing a Fischer Tropsch reaction comprising (a) providing syngas to a reactor, said reactor comprising catalyst particles that have been produced by extruding a paste using a die comprising a plurality of channels extending from an inlet to an outlet, wherein from the inlet to the outlet each channel comprises a first section with a helical bore with a non-circular cross-section, and a second section with a cylindrical bore which has a diameter equal or greater than that of the first section, wherein the second section is at least twice as long as a diameter of the first section; (b) providing the following process conditions in the reactor: a temperature from 125 to 350° C., and a pressure from 5 to 150 bar absolute, and a gaseous hourly space velocity from 500 to 10000 Nl/l/h; and (c) removing Fischer Tropsch product from the reactor.Type: GrantFiled: December 15, 2011Date of Patent: September 16, 2014Assignee: Shell Oil CompanyInventors: Rene Georges Ernst Barthel, Maria Johanna Wilhelmina Van Wieringen, Leonardus Maria Van Der Sman, László Domokos
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Publication number: 20140209506Abstract: A hydrocarbon conversion catalyst composition which comprises dealuminated ZSM-48 and/or EU-2 zeolite and a refractory oxide binder essentially free of alumina, processes for preparing such composition and processes for converting hydrocarbon feedstock with the help of such compositions.Type: ApplicationFiled: October 20, 2011Publication date: July 31, 2014Inventors: László Domokos, Laurent Georges Huve, Hermanus Jongkind, Aan Hendrik Klazinga, Marcello Stefano Rigutto
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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