Patents by Inventor Asit Kumar Das
Asit Kumar Das 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: 11945728Abstract: A process for obtaining vanadium component in the form of vanadium oxide from gasifier slag is disclosed. The process comprises pulverizing the slag to obtain pulverized slag, which is blended with water and an alkali salt to obtain a slurry. The slurry is dried and then roasted in the presence of air to obtain a roasted slag. The roasted slag is leached to obtain a first filtrate comprising the vanadium component. The first filtrate is reacted with a magnesium salt to remove a silica component in the form of a precipitate. The silica free second filtrate is reacted with an ammonium salt to obtain ammonium metavanadate, which is further calcined to obtain the significant amount of vanadium pentoxide (V2O5).Type: GrantFiled: April 3, 2019Date of Patent: April 2, 2024Assignee: Reliance Industries LimitedInventors: Sateesh Daggupati, Sachchit Majhi, Sukumar Mandal, Asit Kumar Das, Vipulkumar Rameshbhai Panchotia, Mehul Bharatbhai Joshi, Gopal Ravichandran, Praveen Kumar Chinthala, Swapan Kumar Ghosh, Ajit Vishwanath Sapre
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Publication number: 20240101506Abstract: The present invention discloses a continuous process for the synthesis of dimethyl carbonate from methanol and carbon dioxide over a ceria-based mixed metal oxide-silica catalyst formulation in the presence of a dehydrating or water trapping compound (2-Cyanopyridine).Type: ApplicationFiled: January 25, 2022Publication date: March 28, 2024Inventors: Darbha SRINIVAS, Vijay Vasant BOKADE, Prashant Suresh NIPHADKAR, Unnikrishnan PULIKKEEL, Snehalkumar PARMAR, Vinay AMTE, Surajit SENGUPTA, Asit Kumar DAS
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Patent number: 11879165Abstract: The present disclosure relates to a process for recovering vanadium in the form of iron vanadate from a gasifier slag. The process comprises pulverizing the slag to obtain pulverized slag (2). The pulverized slag (2) is soaked in water (6) and an alkali salt (4) to obtain a slurry (8), followed by roasting the slurry in the presence of air to obtain roasted slag (12) which is leached (14) to obtain a first solution (18). The first solution (18) is heated at a temperature in the range of 60° C. to 80° C. while adding an iron salt (17) in an amount in the range of 10 wt % to 60 wt % at a pH in the range of 4 to 10, to obtain a second solid residue (21) which is dried to obtain iron vanadate (24).Type: GrantFiled: February 9, 2019Date of Patent: January 23, 2024Assignee: Reliance Industries LimitedInventors: Sateesh Daggupati, Sachchit Majhi, Sukumar Mandal, Asit Kumar Das, Vishwanath Sapre Ajit
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Patent number: 11643609Abstract: The present disclosure relates to a process and a system for producing synthesis gas. The carbonaceous feedstock is gasified, in the presence of at least one of oxygen and steam, in a first reactor to obtain a gaseous mixture comprising H2, CO, CH4, CO2, H2O, tar and char. The gaseous mixture is treated in a second reactor, in the presence of a catalyst, to obtain synthesis gas. The system comprises a first reactor, a connecting conduit, a second reactor, at least one cyclone separator, at least one heat exchanger and at least one synthesis gas filter unit. The process and the system of the present disclosure are capable of producing synthesis gas with comparatively higher conversion of the unreacted char.Type: GrantFiled: August 4, 2017Date of Patent: May 9, 2023Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Sateesh Daggupati, Clifton Gregg Keeler, Sukumar Mandal, Asit Kumar Das, Sachchit Kumar Majhi, Ajay Gupta, Ajit Vish Sapre
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Publication number: 20220379288Abstract: The present disclosure relates to an FCC catalyst composition and a process for its preparation. The FCC catalyst composition comprises Y type zeolite, silicon oxide, alumina, at least one clay, at least one rare earth metal, and at least one metal oxide. The FCC catalyst composition of the present disclosure provides improved yields of high value gasoline such as propylene and LPG and reduces yields of low value hydrocarbons such as CSO and LCO.Type: ApplicationFiled: October 3, 2020Publication date: December 1, 2022Applicant: Reliance Industries LimitedInventors: Sankaranarayanan Thangaraju Murugan, Ravichandran Gopal, Nirav Jethalal Jani, Divakar Duraisamy, Anuj Kumar, Asit Kumar Das
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Publication number: 20220333017Abstract: The present disclosure relates to an FCC catalyst composition and a process for preparing the same. In a first aspect, there is provided an FCC catalyst composition comprising 25 to 45 wt % Y-type zeolite, 20 to 40 wt % silicon oxide, 5 to 25 wt % alumina, 5 to 35 wt % of at least one clay and 0.5 to 3 wt % of at least one rare earth oxide. The weight % of each of the component is with respect to the total weight of the composition. The FCC catalyst composition has an average particle size in the range of 45-120?. In a second aspect, there is provided a process for preparing the FCC catalyst composition, which uses ball milled pseudoboehmite having an average particle size in the range of 1 to 8 micron and the whole process is carried out at a pH value in the range of 6 to 7.Type: ApplicationFiled: October 3, 2020Publication date: October 20, 2022Applicant: Reliance Industries LimitedInventors: Ravichandran Gopal, Nirav Jethalal Jani, Ankit Vipinkumar Patel, Asit Kumar Das
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Patent number: 11383227Abstract: The present disclosure relates to a hydrothermally stable catalyst composition. The hydrothermally stable supported catalyst composition comprises K2CO3 impregnated on an amorphous silica-alumina support. The weight ratio of silica to alumina in the support is in the range of 0.1 to 1.5. The amount of K2CO3 is in the range of 5 wt % to 60 wt % with respect to the total catalyst composition. The catalyst composition is characterized by a pore volume in the range of 0.1 cc/g to 0.9 cc/g, a surface area in the range of 40 m2/g to 250 m2/g and an attrition index in the range of 2% to 8%. The present disclosure also relates to a process for preparing the catalyst composition. The catalyst composition provides improved hydrothermal stability, attrition resistance, high pore volume and surface area for gasifying carbonaceous feed at low temperature, as compared to a conventional catalyst composition.Type: GrantFiled: September 6, 2017Date of Patent: July 12, 2022Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Sukumar Mandal, Sateesh Daggupati, Sachchit Kumar Majhi, Asit Kumar Das
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Patent number: 11319493Abstract: The present disclosure provides a method for catalytic conversion of waste plastic into liquid fuel. The method comprises thermally decomposing the waste plastic at a temperature in the range of 350 to 650° C. and under a pressure in the range of 0.0010 psi to 0.030 psi, to obtain a gaseous stream. The gaseous stream is further subjected to four stage sequential cooling to a temperature in the range of ?5 to ?15° C. to obtain a gas-liquid mixture comprising a gaseous fraction and a liquid fraction. The gas-liquid mixture is fed to the gas-liquid separator to obtain the gaseous fraction comprising C1 to C4 hydrocarbons and the liquid fraction comprising liquid fuel. The method of the present disclosure is simple, economical and energy efficient, which provides a high value liquid fuel with enhanced yield.Type: GrantFiled: August 28, 2019Date of Patent: May 3, 2022Assignee: Reliance Industries LimitedInventors: Sateesh Daggupati, Sayani Thakur, Sachchit Majhi, Sukumar Mandal, Asit Kumar Das, Vishwanath Sapre Ajit
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Patent number: 11299681Abstract: The present disclosure relates to a process for reducing the amount of carbon disulphide (CS2) in a hydrocarbon feed containing C5-C8 fractions. The hydrocarbon feed is treated with an amine functionalized anion exchange resin (basic anion exchange resin) to obtain a mixture comprising a liquid fraction containing treated hydrocarbon and a solid mass containing an adduct of CS2 and the amine functionalized anion exchange resin. The so obtained liquid fraction containing the treated hydrocarbon is separated from the solid mass to obtain the hydrocarbon having CS2 content less than 2 ppm. The amine functionalized anion exchange resin can be regenerated from the solid mass.Type: GrantFiled: August 12, 2017Date of Patent: April 12, 2022Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Swapan Kumar Ghosh, Mukunda Madhab Baishya, Suyog Subhash Salgarkar, Biswajit Shown, Swapnil Prakash Sulakhe, Vilas Shirikrishna Bhide, Prafull Patidar, Mitra Bhanu Patel, Asit Kumar Das
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Publication number: 20210348061Abstract: The present disclosure provides a method for catalytic conversion of waste plastic into liquid fuel. The method comprises thermally decomposing the waste plastic at a temperature in the range of 350 to 650° C. and under a pressure in the range of 0.0010 psi to 0.030 psi, to obtain a gaseous stream. The gaseous stream is further subjected to four stage sequential cooling to a temperature in the range of ?5 to ?15° c. to obtain a gas-liquid mixture comprising a gaseous fraction and a liquid fraction. The gas-liquid mixture is fed to the gas-liquid separator to obtain the gaseous fraction comprising C1 to C4 hydrocarbons and the liquid fraction comprising liquid fuel. The method of the present disclosure is simple, economical and energy efficient, which provides a high value liquid fuel with enhanced yield.Type: ApplicationFiled: August 28, 2019Publication date: November 11, 2021Applicant: Reliance Industries LimitedInventors: Sateesh Daggupati, Sayani Thakur, Sachchit Majhi, Sukumar Mandal, Asit Kumar Das, Vishwanath Sapre Ajit
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Publication number: 20210283585Abstract: The present disclosure relates to a hydrothermally stable catalyst composition. The hydrothermally stable supported catalyst composition comprises K2CO3 impregnated on an amorphous silica-alumina support. The weight ratio of silica to alumina in the support is in the range of 0.1 to 1.5. The amount of K2CO3 is in the range of 5 wt % to 60 wt % with respect to the total catalyst composition. The catalyst composition is characterized by a pore volume in the range of 0.1 cc/g to 0.9 cc/g, a surface area in the range of 40 m2/g to 250 m2/g and an attrition index in the range of 2% to 8%. The present disclosure also relates to a process for preparing the catalyst composition. The catalyst composition provides improved hydrothermal stability, attrition resistance, high pore volume and surface area for gasifying carbonaceous feed at low temperature, as compared to a conventional catalyst composition.Type: ApplicationFiled: September 6, 2017Publication date: September 16, 2021Applicant: Reliance Industries LimitedInventors: Sukumar Mandal, Sateesh Daggupati, Sachchit Kumar Majhi, Asit Kumar Das
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Publication number: 20210284918Abstract: The present disclosure relates to a process for reducing the amount of carbon disulphide (CS2) in a hydrocarbon feed containing C5-C8 fractions. The hydrocarbon feed is treated with an amine functionalized anion exchange resin (basic anion exchange resin) to obtain a mixture comprising a liquid fraction containing treated hydrocarbon and a solid mass containing an adduct of CS2 and the amine functionalized anion exchange resin. The so obtained liquid fraction containing the treated hydrocarbon is separated from the solid mass to obtain the hydrocarbon having CS2 content less than 2 ppm. The amine functionalized anion exchange resin can be regenerated from the solid mass.Type: ApplicationFiled: August 12, 2017Publication date: September 16, 2021Applicant: Reliance Industries LimitedInventors: Swapan Kumar Ghosh, Mukunda Madhab Baishya, Suyog Subhash Salgarkar, Biswajit Shown, Swapnil Prakash Sulakhe, Vilas Shirikrishna Bhide, Prafull Patidar, Mitra Bhanu Patel, Asit Kumar Das
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Patent number: 11118116Abstract: The present disclosure relates to an FCC catalyst additive for cracking of petroleum feedstock and a process for its preparation. The FCC catalyst additive of the present disclosure comprises at least one zeolite, at least one clay, at least one binder, phosphorous in the form of P2O5, and at least one Group IVB metal compound. The FCC catalyst additive of the present disclosure is hydrothermally stable and has improved matrix surface area even after various hydrothermal treatments. The FCC catalyst additive of the present disclosure can be used in combination with the conventional FCC catalyst for catalytic cracking to selectively enhance the propylene and LPG yields.Type: GrantFiled: March 30, 2018Date of Patent: September 14, 2021Assignee: Reliance Industries LimitedInventors: Praveen Kumar Chinthala, Gopal Ravichandran, Tejas Dineshbhai Doshi, Ankit Vipinkumar Patel, Vinodh Rayan, Sukumar Mandal, Asit Kumar Das
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Publication number: 20210017038Abstract: A process for obtaining vanadium component in the form of vanadium oxide from gasifier slag is disclosed. The process comprises pulverizing the slag to obtain pulverized slag, which is blended with water and an alkali salt to obtain a slurry. The slurry is dried and then roasted in the presence of air to obtain a roasted slag. The roasted slag is leached to obtain a first filtrate comprising the vanadium component. The first filtrate is reacted with a magnesium salt to remove a silica component in the form of a precipitate. The silica free second filtrate is reacted with an ammonium salt to obtain ammonium metavanadate, which is further calcined to obtain the significant amount of vanadium pentoxide (V2O5).Type: ApplicationFiled: April 3, 2019Publication date: January 21, 2021Applicant: Reliance Industries LimitedInventors: Sateesh Daggupati, Sachchit Majhi, Sukumar Mandal, Asit Kumar Das, Vipulkumar Rameshbhai Panchotia, Mehul Bharatbhai Joshi, Gopal Ravichandran, Praveen Kumar Chinthala, Swapan Kumar Ghosh, Vishwanath Sapre Ajit
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Publication number: 20200370145Abstract: The present disclosure relates to a process for recovering vanadium in the form of iron vanadate from a gasifier slag. The process comprises pulverizing the slag to obtain pulverized slag (2). The pulverized slag (2) is soaked in water (6) and an alkali salt (4) to obtain a slurry (8), followed by roasting the slurry in the presence of air to obtain roasted slag (12) which is leached (14) to obtain a first solution (18). The first solution (18) is heated at a temperature in the range of 60° C. to 80° C. while adding an iron salt (17) in an amount in the range of 10 wt % to 60 wt % at a pH in the range of 4 to 10, to obtain a second solid residue (21) which is dried to obtain iron vanadate (24).Type: ApplicationFiled: February 9, 2019Publication date: November 26, 2020Applicant: Reliance Industries LimitedInventors: Sateesh Daggupati, Sachchit Majhi, Sukumar Mandal, Asit Kumar Das, Vishwanath Sapre Ajit
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Publication number: 20200071623Abstract: The present disclosure relates to an FCC catalyst additive for cracking of petroleum feedstock and a process for its preparation. The FCC catalyst additive of the present disclosure comprises at least one zeolite, at least one clay, at least one binder, phosphorous in the form of P2O5, and at least one Group IVB metal compound. The FCC catalyst additive of the present disclosure is hydrothermally stable and has improved matrix surface area even after various hydrothermal treatments. The FCC catalyst additive of the present disclosure can be used in combination with the conventional FCC catalyst for catalytic cracking to selectively enhance the propylene and LPG yields.Type: ApplicationFiled: March 30, 2018Publication date: March 5, 2020Applicant: Reliance Industries LimitedInventors: Praveen Kumar CHINTHALA, Gopal RAVICHANDRAN, Tejas Dineshbhai DOSHI, Ankit Vipinkumar PATEL, Vinodh RAYAN, Sukumar MANDAL, Asit Kumar DAS
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Patent number: 10376833Abstract: The present disclosure relates to a process for capturing carbon-dioxide from a gas stream. In order to capture the carbon-dioxide, a support is provided and potassium carbonate (K2CO3) is impregnated thereon to form an adsorbent comprising potassium carbonate (K2CO3) impregnated support. The adsorbent is activated to form an activated adsorbent. The gas stream is passed through the adsorber to enable adsorption of the carbon-dioxide on the activated adsorbent to form a carbon-dioxide laden adsorbent. The carbon-dioxide laden adsorbent is transferred to a desorber for at least partially desorbing the carbon-dioxide from the carbon-dioxide laden adsorbent by passing a carbon-dioxide deficient stream through the desorber. The partially regenerated adsorbent is returned to the adsorber for adsorbing the carbon-dioxide from the carbon-dioxide. The process of the present disclosure reduces the overall energy demand by partially regenerating the adsorbent.Type: GrantFiled: May 18, 2016Date of Patent: August 13, 2019Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Surajit Sengupta, Vinay Amte, Asit Kumar Das, Satyanarayana Reddy Akuri, Manoj Yadav, Sukumar Mandal, Amit Gohel, Sampath Nerivetla, Kalyan Chandra Nath
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Patent number: 10329223Abstract: The present invention provides a process for recovery of propylene and LPG from the fuel gas produced in FCC unit by contacting a heavier hydrocarbon feed with FCC catalyst. The process provides an energy efficient configuration for revamping an existing unit constrained on wet gas compressor capacity or for designing a new gas concentration unit to recover propylene and LPG recovery beyond 97 mole %. The process of the present invention provides an increase propylene and LPG recovery without loading wet gas compressor with marginal increase in liquid loads.Type: GrantFiled: June 20, 2016Date of Patent: June 25, 2019Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Manoj Yadav, Asit Kumar Das, Sukumar Mandal, Amitkumar Parekh, Nilamkumar Limbasiya
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Publication number: 20190169513Abstract: The present disclosure relates to a process and a system for producing synthesis gas. The carbonaceous feedstock is gasified, in the presence of at least one of oxygen and steam, in a first reactor to obtain a gaseous mixture comprising H2, CO, CH4, CO2, H2O, tar and char. The gaseous mixture is treated in a second, reactor, in the presence of a catalyst, to obtain synthesis gas. The system comprises a first reactor, a connecting conduit, a second reactor, at least one cyclone separator, at least one heat exchanger and at least one synthesis gas filter unit. The process and the system of the present disclosure are capable of producing synthesis gas with comparatively higher conversion of the unreacted char.Type: ApplicationFiled: August 4, 2017Publication date: June 6, 2019Applicant: RELIANCE INDUSTRIES LIMITEDInventors: Sateesh DAGGUPATI, Clifton Gregg KEELER, Sukumar MANDAL, Asit Kumar DAS, Sachchit Kumar MAJHI, Ajay GUPTA, Ajit Vish SAPRE
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Publication number: 20190161691Abstract: The present disclosure provides a process for reducing oxygenate content of hydrocarbon feed. The process comprises passing and heating the hydrocarbon feed over ion exchange resin resident in a reactor, maintained at a temperature in the range of 90 to 140° C. and a predetermined pressure, at a predetermined liquid hourly space velocity to obtain a heated intermediate fluid. The heated intermediate fluid is cooled to obtain a cooled intermediate fluid. The cooled intermediate fluid is mixed with water to obtain a mixture. The mixture is allowed to settle to obtain an aqueous phase and an organic phase. The aqueous phase is separated from the organic phase to obtain hydrocarbon feed with reduced oxygenate content. The process is simple and environment friendly, enabling removal of 70-90% of the oxygenate content from the hydrocarbon feed.Type: ApplicationFiled: August 8, 2017Publication date: May 30, 2019Applicant: Reliance Industries LimitedInventors: Swapan Kumar Ghosh, Mukunda Madhab Baishya, Suyog Subhash Salgarkar, Biswajit Shown, Chirag Dalpatbhai Panseriya, Hitesh Ratibhai Kansagra, Asit Kumar Das