Patents by Inventor Rohit Vijay
Rohit Vijay 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: 11948185Abstract: A method being implemented via execution of computing instructions configured to run at one or more processors. The method can include determining a primary store and one or more secondary stores for pickup of an order of a user, based at least in part on a pickup type of the order. The method also can include determining real-time availabilities of first time slots at the primary store and real-time availabilities of second time slots at the one or more secondary stores. The method additionally can include generating a list of available time slots comprising at least a portion of the first time slots at the primary store and at least a portion of the second time slots at the one or more secondary stores, based at least in part on the real-time availabilities of the first time slots at the primary store and the real-time availabilities of the second time slots at the one or more secondary stores.Type: GrantFiled: September 27, 2021Date of Patent: April 2, 2024Assignee: WALMART APOLLO, LLCInventors: Austin Lee Smith, Vineet Wason, Mihir Vijay Bendale, Vidyanand Krishnan, Navkaran Singh Chadha, Puneet Srivastava, Yiren Ye, Nitish Sarin, Avaneesh Tiwari, Zekariyas Kassa Gebru, Rohit Jain, Surnaik Srivastava
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Patent number: 10159963Abstract: Catalyst compositions including a zeolite having a molar ratio of silicon to aluminum of about 10.0 to about 300.0; a Group 10-12 element and combinations thereof; a Group 15 element and combinations thereof; and optionally, a binder, wherein the catalyst composition has a molar ratio of Group 15 element to Group 10-12 element of about 0.01 to about 10.0 are disclosed. Methods of converting organic compounds to aromatics using such catalyst compositions are also disclosed.Type: GrantFiled: December 4, 2014Date of Patent: December 25, 2018Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Brett Loveless, Rohit Vijay, Samia Ilias, Stephen J. McCarthy
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Patent number: 10105690Abstract: A catalyst composition includes a zeolite, a binder, and a Group 12 transition metal selected from the group consisting of Zn, Cd, or a combination thereof, the zeolite having a silicon to aluminum ratio of at least about 10, the catalyst composition comprising about 50 wt % or less of the binder based on a total weight of the catalyst composition, the catalyst composition having a micropore surface area of at least about 340 m2/g, a molar ratio of Group 12 transition metal to aluminum of about 0.1 to about 1.3, and at least one of (a) a mesoporosity of greater than about 20 m2/g; (b) a diffusivity for 2,2-dimethylbutane of greater than about 1×10?2 sec?1 when measured at a temperature of about 120° C. and a 2,2-dimethylbutane pressure of about 60 torr (about 8 kPa).Type: GrantFiled: December 4, 2014Date of Patent: October 23, 2018Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Stephen J. McCarthy, Rohit Vijay, Brett Loveless
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Patent number: 10099209Abstract: A catalyst composition comprising a zeolite, an alumina binder, and a Group 12 transition metal selected from Zn and/or Cd, the zeolite having a Si/Al ratio of at least about 10 and a micropore surface area of at least about 340 m2/g, the catalyst composition comprising about 50 wt % or less of the binder, based on a total weight of the catalyst composition, and having a micropore surface area of at least about 290 m2/g, a molar ratio of Group 12 transition metal to aluminum of about 0.1 to about 1.3, and at least one of: a mesoporosity of about 20 m2/g to about 120 m2/g; a diffusivity for 2,2-dimethylbutane of greater than about 1×10?2 sec?1 when measured at a temperature of about 120° C. and a 2,2-dimethylbutane pressure of about 60 torr (8 kPa); and a combined micropore surface area and mesoporosity of at least about 380 m2/g.Type: GrantFiled: December 4, 2014Date of Patent: October 16, 2018Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Stephen J. McCarthy, Rohit Vijay, Brett Loveless
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Patent number: 9964256Abstract: In a process for the catalytic conversion of organic oxygenates to hydrocarbons, a feed comprising at least one organic oxygenate is contacted with a zeolite catalyst under conditions effective to produce a hydrocarbon product comprising aromatics, olefins and paraffins. At least a fraction of the hydrocarbon product containing C4+ hydrocarbons, including at least part of the olefins, is then contacted with hydrogen in the presence of a hydrogenation catalyst under conditions effective to saturate at least part of the olefins in the C4+-containing fraction and produce a hydrogenated effluent containing less than 1 wt % olefins. The hydrogenated effluent is useful as a diluent for heavy crude oils.Type: GrantFiled: December 8, 2015Date of Patent: May 8, 2018Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Mohsen N. Harandi, Timothy L. Hilbert, Suriyanarayanan Rajagopalan, Stephen J. McCarthy, Rohit Vijay
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Patent number: 9938205Abstract: Apparatuses and processes for converting an oxygenate feedstock, such as methanol and dimethyl ether, in a fluidized bed containing a catalyst to hydrocarbons, such as gasoline boiling components, olefins and aromatics are provided herein.Type: GrantFiled: October 1, 2015Date of Patent: April 10, 2018Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Bing Du, Samuel A. Tabak, Mitch L. Hindman, Eric B. Shen, David L. Johnson, Mohsen N. Harandi, Clay R. Sutton, Lu Han, Michael F. Raterman, Zhongcheng Wang, Rohit Vijay, Stephen J. McCarthy
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Patent number: 9895682Abstract: A catalyst composition comprises a self-bound zeolite and a Group 12 transition metal selected from the group consisting of Zn, Cd, or a combination thereof, the zeolite having a silicon to aluminum ratio of at least about 10, the catalyst composition having a micropore surface area of at least about 340 m2/g, a molar ratio of Group 12 transition metal to aluminum of about 0.1 to about 1.3, and at least one of: (a) a mesoporosity of greater than about 20 m2/g; (b) a diffusivity for 2,2-dimethylbutane of greater than about 1×10?2 sec?1 when measured at a temperature of about 120° C. and a 2,2-dimethylbutane pressure of about 60 torr (about 8 kPa).Type: GrantFiled: December 4, 2014Date of Patent: February 20, 2018Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Stephen J. McCarthy, Rohit Vijay, Brett Loveless
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Patent number: 9809505Abstract: Methods are provided for improving the yield of aromatics during conversion of oxygenate feeds. An oxygenate feed can contain a mixture of oxygenate compounds, including one or more compounds with a hydrogen index of less than 2, so that an effective hydrogen index of the mixture of oxygenates is between about 1.4 and 1.9. Methods are also provided for converting a mixture of oxygenates with an effective hydrogen index greater than about 1 with a pyrolysis oil co-feed. The difficulties in co-processing a pyrolysis oil can be reduced or minimized by staging the introduction of pyrolysis oil into a reaction system. This can allow varying mixtures of pyrolysis oil and methanol, or another oxygenate feed, to be introduced into a reaction system at various feed entry points.Type: GrantFiled: July 11, 2017Date of Patent: November 7, 2017Assignee: ExxonMobil Chemical Patents Inc.Inventors: John S. Buchanan, Stephen H. Brown, Lorenzo C. DeCaul, Brett T. Loveless, Rohit Vijay, Stephen J. McCarthy, Michel Daage, Mayank Shekhar
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Publication number: 20170305810Abstract: Methods are provided for improving the yield of aromatics during conversion of oxygenate feeds. An oxygenate feed can contain a mixture of oxygenate compounds, including one or more compounds with a hydrogen index of less than 2, so that an effective hydrogen index of the mixture of oxygenates is between about 1.4 and 1.9. Methods are also provided for converting a mixture of oxygenates with an effective hydrogen index greater than about 1 with a pyrolysis oil co-feed. The difficulties in co-processing a pyrolysis oil can be reduced or minimized by staging the introduction of pyrolysis oil into a reaction system. This can allow varying mixtures of pyrolysis oil and methanol, or another oxygenate feed, to be introduced into a reaction system at various feed entry points.Type: ApplicationFiled: July 11, 2017Publication date: October 26, 2017Applicant: ExxonMobil Chemical Patents Inc.Inventors: John S. Buchanan, Stephen H. Brown, Lorenzo C. DeCaul, Brett T. Loveless, Rohit Vijay, Stephen J. McCarthy, Michel Daage, Mayank Shekhar
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Patent number: 9783463Abstract: Methods are provided for forming aromatic compounds from a highly unsaturated aliphatic feeds optionally in combination with methanol. The method can include dehydrogenating a feed containing at least about 50 vol % C1-C4 alkanes under dehydrogenation conditions to form a dehydrogenation effluent containing at least about 25 vol % alkynes. Alternatively, other sources of alkyne-containing feeds can be used. At least a portion of the alkyne-containing feed can then be converted under effective conversion conditions to form a conversion effluent comprising a hydrocarbon product containing aromatic compounds.Type: GrantFiled: August 18, 2015Date of Patent: October 10, 2017Assignee: ExxonMobil Chemical Patents Inc.Inventors: Frank Hershkowitz, Stephen H. Brown, Paul F. Keusenkothen, Tilman W. Beutel, Stephen J. McCarthy, Michel Daage, Rohit Vijay, Samia Ilias
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Patent number: 9783460Abstract: Embodiments of the invention provide processes for catalytically converting oxygenates to hydrocarbon products having an increased C6-C8 aromatics content therein. Particular processes include (a) providing a first mixture comprising ?10.0 wt. % of at least one oxygenate, based on the weight of the first mixture; (b) contacting the first mixture with a catalyst to convert the first mixture to a product stream including water, one or more hydrocarbons, hydrogen, and one or more oxygenates, wherein the catalyst comprises at least one molecular sieve and at least one element selected from Groups 2-14 of the Periodic Table and the hydrocarbons comprise ?30.0 wt. % of aromatics, based on the weight of the hydrocarbons in the product stream; and (c) separating from the product stream at least one water-rich stream, at least one aromatic-rich hydrocarbon stream, and at least one aromatic-depleted hydrocarbon stream.Type: GrantFiled: December 4, 2014Date of Patent: October 10, 2017Assignee: ExxonMobil Chemical Patents Inc.Inventors: John D. Ou, Machteld M. Mertens, Linelle T. Jacob, Stephen J. McCarthy, Rohit Vijay, Jeevan S. Abichandani
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Patent number: 9732013Abstract: Methods are provided for improving the yield of aromatics during conversion of oxygenate feeds. An oxygenate feed can contain a mixture of oxygenate compounds, including one or more compounds with a hydrogen index of less than 2, so that an effective hydrogen index of the mixture of oxygenates is between about 1.4 and 1.9. Methods are also provided for converting a mixture of oxygenates with an effective hydrogen index greater than about 1 with a pyrolysis oil co-feed. The difficulties in co-processing a pyrolysis oil can be reduced or minimized by staging the introduction of pyrolysis oil into a reaction system. This can allow varying mixtures of pyrolysis oil and methanol, or another oxygenate feed, to be introduced into a reaction system at various feed entry points.Type: GrantFiled: August 18, 2015Date of Patent: August 15, 2017Assignee: ExxonMobil Chemical Patents Inc.Inventors: John S. Buchanan, Stephen H. Brown, Lorenzo C. DeCaul, Brett T. Loveless, Rohit Vijay, Stephen J. McCarthy, Michel Daage, Mayank Shekhar
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Patent number: 9598651Abstract: An integrated process for producing naphtha fuel, diesel fuel and/or lubricant base oils from feedstocks under sour conditions is provided. The ability to process feedstocks under higher sulfur and/or nitrogen conditions allows for reduced cost processing and increases the flexibility in selecting a suitable feedstock. The sour feed can be delivered to a catalytic dewaxing step without any separation of sulfur and nitrogen contaminants. The integrated process includes an initial dewaxing of a feed under sour conditions, optional hydrocracking of the dewaxed feed, and a separation to form a first diesel product and a bottoms fraction. The bottoms fraction is then exposed to additional hydrocracking and dewaxing to form a second diesel product and optionally a lubricant base oil product. Alternatively, a feedstock can be hydrotreated, fractionated, dewaxed, and then hydrocracked to form a diesel fuel and a dewaxed, hydrocracked bottoms fraction that is optionally suitable for use as a lubricant base oil.Type: GrantFiled: February 11, 2015Date of Patent: March 21, 2017Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Krista M. Prentice, Michel Daage, Ajit B. Dandekar, Christopher G. Oliveri, Rohit Vijay, Stephen J. McCarthy, Wenyih F. Lai, Bradley R. Fingland
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Publication number: 20160176776Abstract: Described herein are processes for production of hydrocarbon products comprising contacting a feed comprising methanol and/or dimethyl ether with a catalyst composition, which comprises a zeolite having a constraint index from 1-12 and an active binder comprising a metal oxide with a dehydrogenation function, under conditions sufficient to form the hydrocarbon product, wherein the hydrocarbon product comprises aromatics, olefins, and/or paraffins. Also described herein are catalyst compositions comprising a zeolite having a 10-/12-membered ring framework and a microporous surface area of at least 150 m2/g, and from ˜1 wt % to ˜10 wt % of a zinc oxide binder, the catalyst composition having a zinc to aluminum atomic ratio from ˜0.08 to ˜8.5.Type: ApplicationFiled: December 2, 2015Publication date: June 23, 2016Applicant: ExxonMobil Research and Engineering CompanyInventors: Samia Ilias, Brett Loveless, Stephen J. McCarthy, Rohit Vijay
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Publication number: 20160178132Abstract: In a process for the catalytic conversion of organic oxygenates to hydrocarbons, a feed comprising at least one organic oxygenate is contacted with a zeolite catalyst under conditions effective to produce a hydrocarbon product comprising aromatics, olefins and paraffins. At least a fraction of the hydrocarbon product containing C4+ hydrocarbons, including at least part of the olefins, is then contacted with hydrogen in the presence of a hydrogenation catalyst under conditions effective to saturate at least part of the olefins in the C4+-containing fraction and produce a hydrogenated effluent containing less than 1 wt % olefins. The hydrogenated effluent is useful as a diluent for heavy crude oils.Type: ApplicationFiled: December 8, 2015Publication date: June 23, 2016Applicant: ExxonMobil Research and Engineering CompanyInventors: Mohsen N. Harandi, Timothy L. Hilbert, Suriyanarayanan Rajagopalan, Stephen J. McCarthy, Rohit Vijay
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Publication number: 20160102031Abstract: Apparatuses and processes for converting an oxygenate feedstock, such as methanol and dimethyl ether, in a fluidized bed containing a catalyst to hydrocarbons, such as gasoline boiling components, olefins and aromatics are provided herein.Type: ApplicationFiled: October 1, 2015Publication date: April 14, 2016Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Bing Du, Samuel A. Tabak, Mitch L. Hindman, Eric B. Shen, David L. Johnson, Mohsen N. Harandi, Clay R. Sutton, Lu Han, Michael F. Raterman, Zhongcheng Wang, Rohit Vijay, Stephen J. McCarthy
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Patent number: 9309472Abstract: Methods are provided for improving the yield of distillate products from hydroprocessing of gas oil feedstocks, such as vacuum gas oils. It has been unexpectedly found that stripping of gases or fractionation to separate out a distillate fraction during initial hydrotreatment of a feed can provide a substantial increase in distillate yield at a desired amount of feedstock conversion. The improvement in yield of distillate products can allow a desired level of conversion to be performed on a feedstock for generating lubricating base oil products while reducing or minimizing the amount of naphtha (or lower) boiling range products. Alternatively, the improvement in yield of distillate products can correspond to an improved yield during a single pass through a reaction system, so that distillate yield is increased even though a lubricant boiling range product is not generated.Type: GrantFiled: November 14, 2014Date of Patent: April 12, 2016Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Rohit Vijay, Ajit Bhaskar Dandekar, Michel Daage, Christopher G. Oliveri, Christine Nicole Elia, Darryl Donald Lacy, Scott J. Weigel, Bradley R. Fingland
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Patent number: 9303218Abstract: Processes are provided for using employing lower activity hydrodesulfurization catalysts while achieving a desired product sulfur content. After determining effective reaction conditions for hydrodesulfurization using a reference catalyst system, an upstream portion of the catalyst system can be replaced with a lower activity upstream portion. The process allows tailored product sulfur levels to be achieved using reaction conditions similar to those for the reference catalyst system.Type: GrantFiled: September 24, 2010Date of Patent: April 5, 2016Assignee: ExxonMobil Research and Engineering CompanyInventors: Edward S. Ellis, Rohit Vijay, Matthew Bennett
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Publication number: 20160090334Abstract: Methods are provided for forming aromatic compounds from a highly unsaturated aliphatic feeds optionally in combination with methanol. The method can include dehydrogenating a feed containing at least about 50 vol % C1-C4 alkanes under dehydrogenation conditions to form a dehydrogenation effluent containing at least about 25 vol % alkynes. Alternatively, other sources of alkyne-containing feeds can be used. At least a portion of the alkyne-containing feed can then be converted under effective conversion conditions to form a conversion effluent comprising a hydrocarbon product containing aromatic compounds.Type: ApplicationFiled: August 18, 2015Publication date: March 31, 2016Inventors: Frank Hershkowitz, Stephen H. Brown, Paul F. Keusenkothen, Tilman W. Beutel, Stephen J. McCarthy, Michel Daage, Rohit Vijay, Samia IIias
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Publication number: 20160090332Abstract: Methods are provided for improving the yield of aromatics during conversion of oxygenate feeds. An oxygenate feed can contain a mixture of oxygenate compounds, including one or more compounds with a hydrogen index of less than 2, so that an effective hydrogen index of the mixture of oxygenates is between about 1.4 and 1.9. Methods are also provided for converting a mixture of oxygenates with an effective hydrogen index greater than about 1 with a pyrolysis oil co-feed. The difficulties in co-processing a pyrolysis oil can be reduced or minimized by staging the introduction of pyrolysis oil into a reaction system. This can allow varying mixtures of pyrolysis oil and methanol, or another oxygenate feed, to be introduced into a reaction system at various feed entry points.Type: ApplicationFiled: August 18, 2015Publication date: March 31, 2016Inventors: John S. Buchanan, Stephen H. Brown, Lorenzo C. DeCaul, Brett T. Loveless, Rohit Vijay, Stephen J. McCarthy, Michel Daage, Mayank Shekhar