Patents by Inventor Vasant P. Thakkar
Vasant P. Thakkar 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: 8404103Abstract: Methods are disclosed for the hydrotreating and hydrocracking of highly aromatic distillate feeds such as light cycle oil (LCO) to produce ultra low sulfur gasoline and diesel fuel. Optimization of hydrotreater severity improves the octane quality of the gasoline or naphtha fraction. In particular, the operation of the hydrotreater at reduced severity to allow at least about 20 ppm by weight of organic nitrogen into the hydrocracker feed is shown to lead to these important benefits. Post-treating of the hydrocracker effluent over an additional hydrotreating catalyst bed may be desired to meet specifications for ultra low sulfur fuel components.Type: GrantFiled: November 1, 2011Date of Patent: March 26, 2013Assignee: UOP LLCInventors: Bart Dziabala, Vasant P. Thakkar, Suheil F. Abdo
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Publication number: 20120043257Abstract: Methods are disclosed for the hydrotreating and hydrocracking of highly aromatic distillate feeds such as light cycle oil (LCO) to produce ultra low sulfur gasoline and diesel fuel. Optimization of hydrotreater severity improves the octane quality of the gasoline or naphtha fraction. In particular, the operation of the hydrotreater at reduced severity to allow at least about 20 ppm by weight of organic nitrogen into the hydrocracker feed is shown to lead to these important benefits. Post-treating of the hydrocracker effluent over an additional hydrotreating catalyst bed may be desired to meet specifications for ultra low sulfur fuel components.Type: ApplicationFiled: November 1, 2011Publication date: February 23, 2012Applicant: UOP LLCInventors: Bart Dziabala, Vasant P. Thakkar, Suheil F. Abdo
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Patent number: 8066867Abstract: Methods are disclosed for the hydrotreating and hydrocracking of highly aromatic distillate feeds such as light cycle oil (LCO) to produce ultra low sulfur gasoline and diesel fuel. Optimization of hydrotreater severity improves the octane quality of the gasoline or naphtha fraction. In particular, the operation of the hydrotreater at reduced severity to allow at least about 20 ppm by weight of organic nitrogen into the hydrocracker feed is shown to lead to these important benefits. Post-treating of the hydrocracker effluent over an additional hydrotreating catalyst bed may be desired to meet specifications for ultra low sulfur fuel components.Type: GrantFiled: November 10, 2008Date of Patent: November 29, 2011Assignee: UOP LLCInventors: Bart Dziabala, Vasant P. Thakkar, Suheil F. Abdo
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Publication number: 20110240519Abstract: One exemplary embodiment can be a process for alkylating and hydrogenating a light cycle oil. The process can include passing the light cycle oil, one or more C2-C6 alkenes, and hydrogen through a reaction vessel containing an alkylation zone and a hydrogenation zone. Generally, the hydrogen is at least partially comprised from a hydrocarbon product stream from a fluid catalytic cracking zone.Type: ApplicationFiled: March 31, 2010Publication date: October 6, 2011Applicant: UOP, LLCInventors: Deng-Yang Jan, Vasant P. Thakkar, Christopher P. Nicholas
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Patent number: 7951290Abstract: A process is provided to produce high cetane quality and low or preferably ultra low sulfur diesel and a fluid catalytic cracker (FCC) quality feedstock from a processing unit including at least a hydrotreating zone and a hydrocracking zone. In one aspect, the processing unit includes reactor severity requirements in both the hydrotreating zone and the hydrocracking zone effective to produce the FCC feed quality and the diesel sulfur quality to permit a high quality hydrocracked product to be formed at lower pressures and conversion rates without overtreating the FCC quality feedstock stream. In another aspect, a portion of the hydrotreated effluent is selected for conversion in the hydrocracking and the remaining portion of the hydrotreated effluent is directed to subsequent processing, such as fluid catalytic cracking.Type: GrantFiled: October 16, 2009Date of Patent: May 31, 2011Assignee: UOP LLCInventors: Vasant P. Thakkar, Douglas W. Kocher-Cowan
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Patent number: 7803334Abstract: A hydrocracking process and apparatus wherein the feedstock is hydrotreated and the liquid and gaseous effluent from the hydrotreater is directly introduced into the upper end of a hydrocracking vessel which provides a liquid seal to prevent the passage of the gaseous stream containing hydrogen sulfide and ammonia from the hydrotreater to enter the hydrocracking zone containing hydrocracking catalyst. Fresh hydrogen is then introduced into the hydrocracking zone.Type: GrantFiled: July 11, 2006Date of Patent: September 28, 2010Assignee: UOP LLCInventors: Richard K. Hoehn, Vasant P. Thakkar, Vedula K. Murty, Douglas W. Kocher-Cowan, Jennifer L. Anderson
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Publication number: 20100160699Abstract: A method for efficient use of hydrogen in aromatics production from heavy aromatic oil. A hydrocarbonaceous stream comprising C9+ hydrocarbons and an essentially pure hydrogen stream are hydrotreated and hydrocracked to produce a hydrocracking zone effluent comprising aromatics. The hydrocracking zone effluent is fractionated to separately recover C4 and lighter hydrocarbons, hydrocarbons boiling between about 180° F. and about 380° F., and diesel. The heavier hydrocarbons are combined with a low purity hydrogen-containing stream and heated, then dehydrogenated or transalkylated to form hydrogen, volatile compounds, and aromatics. The hydrogen and volatile components are separated from the aromatics and treated by pressure swing adsorption to provide an essentially pure hydrogen-containing stream, which is compressed and provided to the hydrotreating and hydrocracking steps. Liquid products are recovered from the aromatics-containing stream.Type: ApplicationFiled: December 23, 2008Publication date: June 24, 2010Inventors: Stanley Joseph FREY, Vasant P. Thakkar
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Publication number: 20100116712Abstract: Methods are disclosed for the hydrotreating and hydrocracking of highly aromatic distillate feeds such as light cycle oil (LCO) to produce ultra low sulfur gasoline and diesel fuel. Optimization of hydrotreater severity improves the octane quality of the gasoline or naphtha fraction. In particular, the operation of the hydrotreater at reduced severity to allow at least about 20 ppm by weight of organic nitrogen into the hydrocracker feed is shown to lead to these important benefits. Post-treating of the hydrocracker effluent over an additional hydrotreating catalyst bed may be desired to meet specifications for ultra low sulfur fuel components.Type: ApplicationFiled: November 10, 2008Publication date: May 13, 2010Inventors: Bart Dziabala, Vasant P. Thakkar, Suheil F. Abdo
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Patent number: 7686941Abstract: A process for simultaneously hydrocracking multiple feedstocks wherein a first feedstock is hydrotreated in a hydrotreating zone to produce a hydrotreating zone effluent which is separated to provide a first vaporous hydrocarbonaceous stream and a first liquid hydrocarbonaceous stream. The second feedstock and the first vaporous hydrocarbonaceous stream are hydroprocessed in a hydroprocessing zone to produce a hydroprocessing zone effluent. A third feedstock and the first liquid hydrocarbonaceous stream are hydrocracked in a hydrocracking zone to produce a hydrocracking zone effluent. The hydrocracking zone effluent and the hydroprocessing zone effluent are separated to recover hydrocracked hydrocarbons.Type: GrantFiled: September 11, 2006Date of Patent: March 30, 2010Assignee: UOP LLCInventors: Gary R. Brierley, Vasant P. Thakkar, Milan Skripek
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Publication number: 20100034708Abstract: A process is provided to produce high cetane quality and low or preferably ultra low sulfur diesel and a fluid catalytic cracker (FCC) quality feedstock from a processing unit including at least a hydrotreating zone and a hydrocracking zone. In one aspect, the processing unit includes reactor severity requirements in both the hydrotreating zone and the hydrocracking zone effective to produce the FCC feed quality and the diesel sulfur quality to permit a high quality hydrocracked product to be formed at lower pressures and conversion rates without overtreating the FCC quality feedstock stream. In another aspect, a portion of the hydrotreated effluent is selected for conversion in the hydrocracking and the remaining portion of the hydrotreated effluent is directed to subsequent processing, such as fluid catalytic cracking.Type: ApplicationFiled: October 16, 2009Publication date: February 11, 2010Applicant: UOP LLCInventors: Vasant P. Thakkar, Douglas W. Kocher-Cowan
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Patent number: 7622034Abstract: A process is provided to produce high cetane quality and low or preferably ultra low sulfur diesel and a fluid catalytic cracker (FCC) quality feedstock from a processing unit including at least a hydrotreating zone and a hydrocracking zone. In one aspect, the processing unit includes reactor severity requirements in both the hydrotreating zone and the hydrocracking zone effective to produce the FCC feed quality and the diesel sulfur quality to permit a high quality hydrocracked product to be formed at lower pressures and conversion rates without overtreating the FCC quality feedstock stream. In another aspect, a portion of the hydrotreated effluent is selected for conversion in the hydrocracking and the remaining portion of the hydrotreated effluent is directed to subsequent processing, such as fluid catalytic cracking.Type: GrantFiled: December 29, 2006Date of Patent: November 24, 2009Assignee: UOP LLCInventors: Vasant P. Thakkar, Douglas W. Kocher-Cowan
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Patent number: 7547386Abstract: An integrated process for the hydroprocessing of multiple feedstreams including vacuum gas oil and light cycle oil. The light cycle oil is reacted with hydrogen in a hydrocracking zone and the hydrocarbon feedstream comprising vacuum gas oil is reacted with hydrogen in a hydrodesulfurization reaction zone. The hydrotreated vacuum gas oil is good FCC feedstock. Naphtha and ultra low sulfur diesel are recovered in a common fractionation column.Type: GrantFiled: February 2, 2005Date of Patent: June 16, 2009Assignee: UOP LLCInventors: Vasant P. Thakkar, Richard K. Hoehn
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Publication number: 20090065401Abstract: In an atmospheric fractionator, the number of theoretical stages are increased in the upper light distillate flash zone and in the middle heavy distillate flash zone. The middle distillate pumparound circuit has been eliminated. The reflux to distillate ratio for the light distillate as well as the effluent feed temperature have been substantially increased. As a result, increased yields for middle distillate (e.g. kerosene) and heavy distillate (eg diesel) have been achieved which more than offset the increased energy consumption used for the higher feed temperature In the example of hydrocracking technology, the improved fractionation has benefits in the hydrocracking unit outside of the fractionation unit Increased fractionation efficiency reduces the severity in the hydrocracking unit reactor catalyst and less hydrogen is consumed. The invention can be applied to several other refining technologies besides hydrocracking.Type: ApplicationFiled: September 12, 2007Publication date: March 12, 2009Inventors: John A. Petri, Vasant P. Thakkar
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Patent number: 7419582Abstract: A hydrocracking process wherein the feedstock is hydrotreated and the liquid and gaseous effluent from the hydrotreater is directly introduced into the upper end of a hydrocracking vessel which provides a liquid seal to prevent the passage of the gaseous stream containing hydrogen sulfide and ammonia from the hydrotreater to enter the hydrocracking zone containing hydrocracking catalyst. Fresh hydrogen is then introduced into the hydrocracking zone. An apparatus for hydrocracking a hydrocarbon feedstock is also disclosed.Type: GrantFiled: July 11, 2006Date of Patent: September 2, 2008Assignee: UOP LLCInventors: Richard K. Hoehn, Vasant P. Thakkar, Vedula K. Murty, Douglas W. Kocher-Cowan, Jennifer L. Anderson
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Patent number: 7384542Abstract: A process for the production of low sulfur diesel and high octane naphtha.Type: GrantFiled: June 7, 2004Date of Patent: June 10, 2008Assignee: UOP LLCInventors: Vasant P. Thakkar, Richard K. Hoehn
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Patent number: 7368619Abstract: A process for the production of low sulfur diesel and aromatic compounds wherein C9+ hydrocarbons are hydrocracked to produce low sulfur diesel and a naphtha boiling range stream which is transalkylated in an integrated transalkylation zone to produce xylene.Type: GrantFiled: June 15, 2004Date of Patent: May 6, 2008Assignee: UOP LLCInventors: Stanley J. Frey, Vasant P. Thakkar
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Publication number: 20080060976Abstract: A process for simultaneously hydrocracking multiple feedstocks wherein a first feedstock is hydrotreated in a hydrotreating zone to produce a hydrotreating zone effluent which is separated to provide a first vaporous hydrocarbonaceous stream and a first liquid hydrocarbonaceous stream. The second feedstock and the first vaporous hydrocarbonaceous stream are hydroprocessed in a hydroprocessing zone to produce a hydroprocessing zone effluent. A third feedstock and the first liquid hydrocarbonaceous stream are hydrocracked in a hydrocracking zone to produce a hydrocracking zone effluent. The hydrocracking zone effluent and the hydroprocessing zone effluent are separated to recover hydrocracked hydrocarbons.Type: ApplicationFiled: September 11, 2006Publication date: March 13, 2008Inventors: Gary R. Brierley, Vasant P. Thakkar, Milan Skripek
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Patent number: 7265252Abstract: A process for the conversion of a hydrocarbon feedstock to produce xylene compounds. The feedstock is selectively hydrocracked and introduced into a transalkylation zone with a hydrocarbonaceous stream rich in benzene, toluene and C9+ hydrocarbons.Type: GrantFiled: December 18, 2003Date of Patent: September 4, 2007Assignee: UOP LLCInventors: Stanley J. Frey, Suheil F. Abdo, Antoine Negiz, Edwin P. Boldingh, Vasant P. Thakkar, Lubo Zhou
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Patent number: 7108779Abstract: A process for the production of low sulfur hydrocarbonaceous products. The hydrocarbon feedstocks are processed in integrated desulfurization zone, hydrocracking and hydrogenation zones to produce ultra low sulfur diesel, low sulfur naphtha products and low sulfur heavy distillate.Type: GrantFiled: September 25, 2003Date of Patent: September 19, 2006Assignee: UOP LLCInventor: Vasant P. Thakkar
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Patent number: 7097760Abstract: A catalytic hydrocracking process for the production of ultra low sulfur diesel wherein a hydrocarbonaceous feedstock is hydrocracked at elevated temperature and pressure to obtain conversion to diesel boiling range hydrocarbons. The resulting hydrocracking zone effluent is hydrogen stripped in a stripping zone maintained at essentially the same pressure as the hydrocracking zone to produce a first gaseous hydrocarbonaceous stream and a first liquid hydrocarbonaceous stream. The first gaseous hydrocarbonaceous stream containing diesel boiling range hydrocarbons is introduced into a desulfurization zone and subsequently partially condensed to produce a hydrogen-rich gaseous stream and a second liquid hydrocarbonaceous stream containing diesel boiling range hydrocarbons. The first liquid stream is separated to produce a third liquid hydrocarbonaceous stream containing diesel boiling range hydrocarbons which is also introduced into the desulfurization zone. An ultra low sulfur diesel product stream is recovered.Type: GrantFiled: May 7, 2002Date of Patent: August 29, 2006Assignee: UOP LLCInventors: Tom N. Kalnes, Vasant P. Thakkar, Richard K. Hoehn