Patents by Inventor Daniel H. Wei
Daniel H. Wei 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: 9963407Abstract: A process of oxidative dehydrogenation in a fluidized riser reactor is described. Hydrocarbon feed and catalyst are fed to the bottom of the fluidized riser reactor. Part of the hydrogen produced in the dehydrogenation reaction is oxidized using oxygen introduced into the riser reactor through oxygen injection ports to produce the heat required for the dehydrogenation reaction.Type: GrantFiled: June 18, 2013Date of Patent: May 8, 2018Assignee: UOP LLCInventors: Laurence O. Stine, Bipin V. Vora, Malek Y. S. Ibrahim, Daniel H. Wei
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Publication number: 20140371504Abstract: A process of oxidative dehydrogenation in a fluidized riser reactor is described. Hydrocarbon feed and catalyst are fed to the bottom of the fluidized riser reactor. Part of the hydrogen produced in the dehydrogenation reaction is oxidized using oxygen introduced into the riser reactor through oxygen injection ports to produce the heat required for the dehydrogenation reaction.Type: ApplicationFiled: June 18, 2013Publication date: December 18, 2014Inventors: Laurence O. Stine, Bipin V. Vora, Malek Y.S. Ibrahim, Daniel H. Wei
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Publication number: 20140371503Abstract: A single stage dehydrogenation reactor system including a charge heater and one or more reactors is described. The hydrocarbon feed is combined with hydrogen and heated in a charge heater to a temperature lower than the dehydrogenation temperature to avoid thermal cracking. Before entering the dehydrogenation reactors, oxygen is added. The oxidative preheat then takes place in the presence of the dual functional catalyst which has dehydrogenation and selective oxidation activities. The oxygen selectively burns hydrogen and raises the reaction temperature, and the dehydrogenation reaction then occurs.Type: ApplicationFiled: June 18, 2013Publication date: December 18, 2014Inventors: Daniel H. Wei, Laurence O. Stine
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Publication number: 20140296587Abstract: A process is present for increasing the yields of 1,3 butadiene. The process includes recovering 1,3 butadiene from a cracking unit that generates a crude C4 stream. The 1,3 butadiene is separated and the remaining C4 process stream components are further reacted and dehydrogenated to generate 1,3 butadiene in a subsequent process stream. The subsequent process stream is recycled to recover the additional 1,3 butadiene.Type: ApplicationFiled: March 28, 2013Publication date: October 2, 2014Applicant: UOP LLCInventors: Andrea G. Bozzano, Bipin V. Vora, Daniel H. Wei, Steven L. Krupa
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Patent number: 8603399Abstract: An improved processing system of an oxygenate-containing feedstock for increased production or yield of light olefins. Such processing involves oxygenate conversion to olefins and subsequent cracking of heavier olefins wherein at least a portion of the products from each of the reactors is elevated in pressure, using a common compressor, prior to being routed to a common product fractionation and recovery section. The system further comprises acid gas removal means to remove acid gases from the cracked product gas and that the olefin cracking reactor is a moving bed reactor.Type: GrantFiled: October 1, 2009Date of Patent: December 10, 2013Assignee: UOP LLCInventors: Tom N. Kalnes, Robert B. James, Jr., Daniel H. Wei, Bryan K. Glover
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Publication number: 20100087693Abstract: Improved processing of an oxygenate-containing feedstock for increased production or yield of light olefins. Such processing involves oxygenate conversion to olefins and subsequent cracking of heavier olefins wherein at least a portion of the products from each of the reactors is elevated in pressure, using a common compressor, prior to being routed to a common product fractionation and recovery section. In one particular embodiment, the cracked product gas can be treated to remove acid gas therefrom. In another embodiment, the olefin cracking reactor is a moving bed reactor.Type: ApplicationFiled: December 8, 2009Publication date: April 8, 2010Applicant: UOP LLCInventors: Tom N. Kalnes, Robert B. James, JR., Daniel H. Wei, Bryan K. Glover
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Patent number: 7687671Abstract: Improved processing of an oxygenate-containing feedstock for increased production or yield of light olefins. Such processing involves oxygenate conversion to olefins and subsequent cracking of heavier olefins wherein at least a portion of the products from each of the reactors is elevated in pressure, using a common compressor, prior to being routed to a common product fractionation and recovery section. In one particular embodiment, the cracked product gas can be treated to remove acid gas therefrom. In another embodiment, the olefin cracking reactor is a moving bed reactor.Type: GrantFiled: December 5, 2005Date of Patent: March 30, 2010Assignee: UOP LLCInventors: Tom N. Kalnes, Robert B. James, Jr., Daniel H. Wei, Bryan K. Glover
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Publication number: 20100048965Abstract: Improved processing of an oxygenate-containing feedstock for increased production or yield of light olefins. Such processing involves oxygenate conversion to olefins and subsequent cracking of heavier olefins wherein at least a portion of the products from each of the reactors is elevated in pressure, using a common compressor, prior to being routed to a common product fractionation and recovery section. In one particular embodiment, the cracked product gas can be treated to remove acid gas therefrom. In another embodiment, the olefin cracking reactor is a moving bed reactor.Type: ApplicationFiled: October 30, 2009Publication date: February 25, 2010Applicant: UOP LLCInventors: Tom N. Kalnes, Robert B. James, JR., Daniel H. Wei, Bryan K. Glover
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Patent number: 7663012Abstract: The average cycle propylene selectivity of an oxygenate to propylene (OTP) process using one or more fixed beds of a dual-function oxygenate conversion catalyst is substantially enhanced by the use of moving bed reactor technology in the hydrocarbon synthesis portion of the OTP flow scheme in lieu of fixed bed technology coupled with the selection of a catalyst on-stream cycle time of 200 hours or less. Those provisions hold the build-up of coke deposits on the catalyst to a level which does not substantially degrade dual-function catalyst activity, oxygenate conversion and propylene selectivity, thereby enabling maintenance of propylene average cycle yield at essentially start-of-cycle levels. The propylene average cycle yield improvement enabled by the present invention over that achieved by the fixed bed system of the prior art using the same or a similar catalyst system is of the order of about 1.5 to 5.5 wt-% or more.Type: GrantFiled: May 6, 2008Date of Patent: February 16, 2010Assignee: UOP LLCInventors: Tom N. Kalnes, Daniel H. Wei, Bryan K. Glover
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Publication number: 20100021357Abstract: Improved processing of an oxygenate-containing feedstock for increased production or yield of light olefins. Such processing involves oxygenate conversion to olefins and subsequent cracking of heavier olefins wherein at least a portion of the products from each of the reactors is elevated in pressure, using a common compressor, prior to being routed to a common product fractionation and recovery section. In one particular embodiment, the cracked product gas can be treated to remove acid gas therefrom. In another embodiment, the olefin cracking reactor is a moving bed reactor.Type: ApplicationFiled: October 1, 2009Publication date: January 28, 2010Applicant: UOP LLCInventors: Tom N. Kalnes, Robert B. James, JR., Daniel H. Wei, Bryan K. Glover
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Publication number: 20080242910Abstract: The average cycle propylene selectivity of an oxygenate to propylene (OTP) process using one or more fixed beds of a dual-function oxygenate conversion catalyst is substantially enhanced by the use of moving bed reactor technology in the hydrocarbon synthesis portion of the OTP flow scheme in lieu of fixed bed technology coupled with the selection of a catalyst on-stream cycle time of 200 hours or less. Those provisions hold the build-up of coke deposits on the catalyst to a level which does not substantially degrade dual-function catalyst activity, oxygenate conversion and propylene selectivity, thereby enabling maintenance of propylene average cycle yield at essentially start-of-cycle levels. The propylene average cycle yield improvement enabled by the present invention over that achieved by the fixed bed system of the prior art using the same or a similar catalyst system is of the order of about 1.5 to 5.5 wt-% or more.Type: ApplicationFiled: May 6, 2008Publication date: October 2, 2008Inventors: Tom N. Kalnes, Daniel H. Wei, Bryan K. Glover
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Patent number: 7405337Abstract: The average cycle propylene selectivity of an oxygenate to propylene (OTP) process using one or more fixed or moving beds of a dual-function oxygenate conversion catalyst with recycle of one or more C4+ olefin-rich fractions is substantially enhanced by the use of selective hydrotreating technology on these C4+ olefin-rich recycle streams to substantially eliminate detrimental coke precursors such as dienes and acetylenic hydrocarbons. This hydrotreating step helps hold the build-up of detrimental coke deposits on the catalyst to a level which does not substantially degrade dual-function catalyst activity, oxygenate conversion and propylene selectivity, thereby enabling a substantial improvement in propylene average cycle yield. The propylene average cycle yield improvement enabled by the present invention over that achieved by the prior art using the same or a similar catalyst system but without the use of the hydrotreating step on the C4+ olefin-rich recycle stream is of the order of about 1.5 to 5.Type: GrantFiled: September 21, 2004Date of Patent: July 29, 2008Assignee: UOP LLCInventors: Tom N. Kalnes, Daniel H. Wei, Bryan K. Glover
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Patent number: 7371915Abstract: The average cycle propylene selectivity of an oxygenate to propylene (OTP) process using one or more fixed beds of a dual-function oxygenate conversion catalyst is substantially enhanced by the use of moving bed reactor technology in the hydrocarbon synthesis portion of the OTP flow scheme in lieu of fixed bed technology coupled with the selection of a catalyst on-stream cycle time of 200 hours or less. Those provisions hold the build-up of coke deposits on the catalyst to a level which does not substantially degrade dual-function catalyst activity, oxygenate conversion and propylene selectivity, thereby enabling maintenance of propylene average cycle yield at essentially start-of-cycle levels. The propylene average cycle yield improvement enabled by the present invention over that achieved by the fixed bed system of the prior art using the same or a similar catalyst system is of the order of about 1.5 to 5.5 wt-% or more.Type: GrantFiled: June 25, 2004Date of Patent: May 13, 2008Assignee: UOP LLCInventors: Tom N. Kalnes, Daniel H. Wei, Bryan K. Glover
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Patent number: 7371916Abstract: The average propylene selectivity per on-stream cycle of an alcoholic oxygenate to propylene (OTP) process using one or more fixed beds of a dual-function oxygenate conversion catalyst is substantially enhanced by the use of a feed pretreatment step involving a catalytic etherification reaction, by switching to moving bed reactor technology in the olefin synthesis portion of the OTP flow scheme in lieu of fixed bed technology and by the selection of a catalyst on-stream cycle time of 300 hours or less. These provisions hold the build-up of coke deposits on the dual-function catalyst to a level which does not substantially degrade catalyst activity, oxygenate conversion and propylene selectivity, thereby enabling maintenance of propylene average cycle yield at essentially start-of-cycle levels.Type: GrantFiled: September 16, 2004Date of Patent: May 13, 2008Assignee: UOP LLCInventors: Tom N. Kalnes, Daniel H. Wei, Bryan K. Glover
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Patent number: 6756340Abstract: A novel catalyst composite is disclosed. Also disclosed is a use for the novel composite. The catalyst composite comprises a Group VIII noble metal component, a Group IA or IIA metal component, and a component selected from the group consisting of tin, germanium, lead, indium, gallium, thallium, or mixtures thereof, all on an alumina support comprising essentially theta-alumina, having a surface area from about 50 to about 120 m2/g, an apparent bulk density of at 0.5 g/cm3 and a mole ratio of the Group VIII noble metal component to the component selected from the group consisting of tin, germanium, lead, indium, gallium, thallium or mixtures thereof in the range from about 1.5 to about 1.7.Type: GrantFiled: April 8, 2002Date of Patent: June 29, 2004Assignee: UOP LLCInventors: Timur V. Voskoboynikov, Daniel H. Wei, J. W. Adriaan Sachtler, Bipin V. Vora
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Publication number: 20030202934Abstract: A hydrocarbon dehydrogenation process utilizing a novel catalyst composite. The catalyst composite comprises a Group VIII noble metal component, a Group IA or IIA metal component, and a component selected from the group consisting of tin, germanium, lead, indium, gallium, thallium, or mixtures thereof, all on an alumina support comprising essentially theta-alumina, having a surface area from about 50 to about 120 m2/g, an apparent bulk density of at 0.5 g/cm3 and a mole ratio of the Group VIII noble metal component to the component selected from the group consisting of tin, germanium, lead, indium, gallium, thallium or mixtures thereof in the range from about 1.5 to about 1.7.Type: ApplicationFiled: April 3, 2003Publication date: October 30, 2003Inventors: Timur V. Voskoboynikov, Daniel H. Wei, J. W. Adriaan Sachtler, Bipin V. Vora
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Publication number: 20030191351Abstract: A novel catalyst composite is disclosed. Also disclosed is a use for the novel composite. The catalyst composite comprises a Group VIII noble metal component, a Group IA or IIA metal component, and a component selected from the group consisting of tin, germanium, lead, indium, gallium, thallium, or mixtures thereof, all on an alumina support comprising essentially theta-alumina, having a surface area from about 50 to about 120 m2/g, an apparent bulk density of at 0.5 g/cm3 and a mole ratio of the Group VIII noble metal component to the component selected from the group consisting of tin, germanium, lead, indium, gallium, thallium or mixtures thereof in the range from about 1.5 to about 1.7.Type: ApplicationFiled: April 8, 2002Publication date: October 9, 2003Inventors: Timur V. Voskoboynikov, Daniel H. Wei, J. W. Adriaan Sachtler, Bipin V. Vora
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Patent number: 6548721Abstract: Disclosed is a process for completely destroying oxygenates in a feed stream. The feed stream of oxygenates typically includes olefins and it is reacted with hydrogen over a catalyst comprising a top row of Group VIII metal and a Group VI-B metal. Olefins are essentially completely saturated and any sulfur compounds present in the feed are completely converted to hydrogen sulfide. A preferred catalyst includes 2 to 5 wt-% nickel, 5 to 15 wt-% molybdenum, at least 5.5 wt-% sulfur, less than 0.05 wt-% phosphorus and no more than 0.3 wt-% silicon. The catalyst has low acidity and therefore does not promote the cracking of desired oligomeric products. The deoxygenation process is preferably a saturation process that follows an oligomerization process in which light olefins are oligomerized to heavy olefins. The saturation catalyst preferably has lower acidity which causes minimal cracking of desired oligomeric products.Type: GrantFiled: May 22, 2001Date of Patent: April 15, 2003Assignee: UOP LLCInventors: Beth Mc Culloch, Jennifer L. Gordon, Peter Kokayeff, Suheil F. Abdo, Daniel H. Wei