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: 10208262Abstract: An improved process for the catalytic gasification of a carbonaceous feedstock in a dual fluidized bed reactor for producing synthesis gas is disclosed. The disclosure uses ?-alumina as a catalyst support i and heat carrier in the gasification zone (102). The gasification zone (102) is operated at 700-750° C. to prevent substantial conversion of ?-alumina to ?-alumina, which would manifest in the enablement of high catalyst loading and high recyclability. The catalyst is an alkali metal, preferably K2CO3, so that conversion proportional to total K2CO3 to solid carbon ratio is achieved with as high K2CO3 loading as 50 wt % on the solid support. The combustion zone (140) is operated at 800°-840° C., to prevent any conversion of the ?-alumina to ?-alumina, so that catalyst recyclability of up to 98% is achieved between two successive cycles.Type: GrantFiled: December 18, 2013Date of Patent: February 19, 2019Assignee: Reliance Industries LimitedInventors: Sateesh Daggupati, Sukumar Mandal, Asit Kumar Das, Ajit Vishwanath Sapre
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Patent number: 10166502Abstract: The present disclosure provides a single compression system and a process for capturing carbon dioxide (CO2) from a flue gas stream containing CO2. The disclosure also provides a process for regeneration of the carbon dioxide capture media.Type: GrantFiled: September 29, 2014Date of Patent: January 1, 2019Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Vinay Amte, Asit Kumar Das, Surajit Sengupta, Manoj Yadav, Sukumar Mandal, Alok Pal, Ajay Gupta, Ramesh Bhujade, Satyanarayana Reddy Akuri, Rajeshwer Dongara
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Patent number: 10112170Abstract: The present invention relates to a stabilized inorganic oxide support for capturing carbon dioxide from gases having high regeneration capacities over many cycles. The method for preparing the stabilized inorganic oxide support includes stabilizing an alumina-containing precursor by either calcining or steaming, impregnating an alkali or alkaline earth compound into the stabilized alumina-and drying the alkali or alkaline earth compound-impregnated stabilized alumina. The stabilized inorganic oxide support can be regenerated at lower temperatures between 100 and 150° C. The carbon dioxide adsorption capacity of the regenerated support is between 70 and 90% of the theoretical carbon dioxide adsorption capacity.Type: GrantFiled: January 28, 2015Date of Patent: October 30, 2018Assignee: Reliance Industries LimitedInventors: Akuiri Satyanarayana Reddy, Surajit Sengupta, Rajeshwer Dongara, Asit Kumar Das, Vinay Amte, Ashwani Yadav, Pramod Kumar Bajpai, Haripada Bhunia
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Publication number: 20180169574Abstract: 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: ApplicationFiled: May 18, 2016Publication date: June 21, 2018Applicant: 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: 9982200Abstract: A method for removing chloride impurities from a heavy hydrocarbon stream is disclosed. The heavy hydrocarbon stream is contacted with a stripping medium at a temperature ranging between 100-450° C. and at a pressure ranging between 0.1-2 bar with ratio of the heavy hydrocarbon stream to the stripping medium ranging between 1-30; wherein the temperature is maintained below the initial boiling point of the hydrocarbon stream.Type: GrantFiled: July 10, 2013Date of Patent: May 29, 2018Assignee: Reliance Industries LimitedInventors: Mahesh Gopalrao Marve, Amit Kumar Parekh, Asit Kumar Das, Rajeshwer Dongara, Devpal Singh Rana, Harender Bisht, Hitesh Kumar Sahu, Jai Kumar Singh, Kalyan Nath, Manoj Yadav, Sampath Nerivetla, Sukumar Mandal
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Patent number: 9944867Abstract: A computer implemented blend control system and method for preparation of a hydrocarbon blend from a plurality of components drawn from respective component tanks have been disclosed. The system, in accordance with the present disclosure includes at least one sensor and analyzer adapted to sense and analyze a first attribute of at least one of the components for obtaining first attribute data. The system further includes, at least one optimizer having a data storage means for storing attribute based model data. The optimizer receives the first attribute data and transmits the received first attribute data to a comparator which computes an optimized proportion data between each of the component streams to enable selective drawing of each of the component streams in accordance with the optimized proportion data for preparing the hydrocarbon blend.Type: GrantFiled: January 8, 2014Date of Patent: April 17, 2018Assignee: Reliance Industries LimitedInventors: Anil Wadhwa, Ashish Ranjan Jha, Chandra Saravanan, Asit Kumar Das, Pinakiranjan Sankarprasad Patra, Sukumar Mandal, Praveen Kumar Chinthala, Gopal Ravichandran, Sudhirkumar Raojibhai Patel, Anand Raj Rajan, Ashok Swamisharan Pathak, Saumya Srivastava
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Patent number: 9939821Abstract: A computer implemented blend control system and method for preparation of a hydrocarbon blend from a plurality of component streams have been disclosed. The system includes a product tank for receiving a mixture comprising the plurality of component streams. The system further includes a sensor and analyzer adapted to sense and analyze a first attribute of the received mixture for obtaining a first attribute data. The system further includes an optimizer which stores the attribute based model data, receives the first attribute data and compares the received first attribute data with the attribute based model data to compute an optimized proportion data, based on which the component streams are selectively drawn into the product tank for preparing the hydrocarbon blend.Type: GrantFiled: January 8, 2014Date of Patent: April 10, 2018Assignee: Reliance Industries LimitedInventors: Anil Wadhwa, Ashish Ranjan Jha, Chandra Saravanan, Asit Kumar Das, Pinakiranjan Sankarprasad Patra, Sukumar Mandal, Praveen Kumar Chinthala, Gopal Ravichandran, Sudhirkumar Raojibhai Patel, Anand Raj Rajan, Ashok Swamisharan Pathak, Saumya Srivastava
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Patent number: 9931593Abstract: The present disclosure provides a multiple-compression system and a process for capturing carbon dioxide (CO2) from a flue gas stream containing CO2. The disclosure also provides a process for regeneration of the carbon dioxide capture media.Type: GrantFiled: September 29, 2014Date of Patent: April 3, 2018Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Vinay Amte, Asit Kumar Das, Surajit Sengupta, Manoj Yadav, Sukumar Mandal, Alok Pal, Ajay Gupta, Ramesh Bhujade, Satyanarayana Reddy Akuri, Rajeshwer Dongara
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Patent number: 9809739Abstract: The present disclosure relates to a method for regeneration of spent ion exchange resins to obtain regenerated ion-exchange resins. The regenerated ion exchange resins can efficiently reduce the total acid number (TAN) of highly acidic crude oils. The present disclosure particularly relates to a method of treatment of spent ion exchange resins using at least one non-acidic crude oil condensate and at least one polar organic solvent.Type: GrantFiled: August 19, 2014Date of Patent: November 7, 2017Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Biswajit Shown, Swapan Ghosh, Asit Kumar Das, Suyog Subhash Salgarkar, Mukunda Madhav Baishya, Mitul Amrutbhai Ladani, Chirag Dalpatbhai Panseriya
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Patent number: 9790175Abstract: In the present disclosure there is provided a process for obtaining di-sulfide oil having sodium level below 0.1 ppm wherein a stream comprising di-sulfide oil having sodium level 1 ppm, collected as a waste stream from LPG desulfurization unit, is passed through an alumina bed packed in a column at a pre-determined liquid hourly space velocity (LHSV) and at pre-determined temperature to obtain a treated stream comprising di-sulfide oil having sodium level below 0.1 ppm.Type: GrantFiled: March 13, 2015Date of Patent: October 17, 2017Assignee: Reliance Industries LimitedInventors: Biswajit Shown, Nagarathinam Shenbaga Murthy, Asit Kumar Das, Swapan Ghosh, Bidhayak Das, Rajeshwer Dongara, Anirban Ray, Chirag Dalpatbhai Panseriya, Udayan Sivathanu Ramalakshmi, Atul Kathiria
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Patent number: 9783743Abstract: The present invention relates to a catalyst composition for Fluid Catalytic Cracking (FCC) which contains a combination of a FCC catalyst component and an additive component with certain physical properties attributed therein. The present invention is also directed to provide methods for the preparation of the catalyst composition for FCC. The admixture of the FCC catalyst component and additive component is used in cracking of hydrocarbon feedstock containing hydrocarbons of higher molecular weight and higher boiling point and/or olefin gasoline naphtha feedstock for producing lower yield of fuel gas without affecting the conversion and yield of general cracking products such as gasoline, propylene and C4 olefins.Type: GrantFiled: January 6, 2014Date of Patent: October 10, 2017Assignee: Reliance Industries LimitedInventors: Srikanta Dinda, Praveen Kumar Chinthala, Amit Gohel, Ashwani Yadav, Sukumar Mandal, Gopal Ravichandran, Asit Kumar Das
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Publication number: 20170080400Abstract: The present invention relates to a stabilized inorganic oxide support for capturing carbon dioxide from gases having high regeneration capacities over many cycles. The method for preparing the stabilized inorganic oxide support includes stabilizing an alumina-containing precursor by either calcining or steaming, impregnating an alkali or alkaline earth compound into the stabilized alumina-and drying the alkali or alkaline earth compound-impregnated stabilized alumina-. The stabilized inorganic oxide support can be regenerated at lower temperatures between 100 and 150° C. The carbon dioxide adsorption capacity of the regenerated support is between 70 and 90% of the theoretical carbon dioxide adsorption capacity.Type: ApplicationFiled: January 28, 2015Publication date: March 23, 2017Applicant: Reliance Industries LimitedInventors: Akuiri Satyanarayana Reddy, Surajit Sengupta, Rajeshwer Dongara, Asit Kumar Das, Vinay Amte, Ashwani Yadav, Pramod Kumar Bajpai, Haripada Bhunia
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Patent number: 9550708Abstract: A process for catalytic conversion of low value hydrocarbon streams to light olefins in comparatively higher yields is disclosed. Propylene is obtained in amounts higher than 20 wt. % and ethylene higher than 6 wt. %. The process is carried out in a preheated cracking reactor having a single riser and circulating an FCC catalyst. The riser is divided into three temperature zones in which different hydrocarbon feeds are introduced. An oxygenate feed is introduced in the operative top zone in the riser. Heat for the endothermic cracking is obtained by the exothermic reaction of converting the oxygenate feed into gas and/or from a regenerator in which the spent FCC catalyst is burnt.Type: GrantFiled: August 14, 2014Date of Patent: January 24, 2017Assignee: Reliance Industries LimitedInventors: Sukumar Mandal, Manoj Yadav, Amitkumar Parekh, Asit Kumar Das, Shubhangi Jaguste, Praveen Kumar Chinthala, Gopal Ravichandran, Mahesh Marve, Ajit Sapre
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Publication number: 20160368841Abstract: 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: ApplicationFiled: June 20, 2016Publication date: December 22, 2016Applicant: RELIANCE INDUSTRIES LIMITEDInventors: Manoj YADAV, Asit Kumar DAS, Sukumar MANDAL, Amitkumar PAREKH, Nilamkumar LIMBASIYA
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Publication number: 20160362363Abstract: In the present disclosure there is provided a process for obtaining di-sulfide oil having sodium level below 0.1 ppm wherein a stream comprising di-sulfide oil having sodium level 1 ppm, collected as a waste stream from LPG desulfurization unit, is passed through an alumina bed packed in a column at a pre-determined liquid hourly space velocity (LHSV) and at pre-determined temperature to obtain a treated stream comprising di-sulfide oil having sodium level below 0.1 ppm.Type: ApplicationFiled: March 13, 2015Publication date: December 15, 2016Applicant: Reliance Industries LimitedInventors: Biswajit Shown, Nagarathinam Shenbaga Murthy, Asit Kumar Das, Swapan Ghosh, Bidhayak Das, Rajeshwer Dongara, Anirban Ray, Chirag Dalpatbhai Panseriya, Udayan Sivathanu Ramalakshmi, Atul Kathiria
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Publication number: 20160250582Abstract: The present disclosure provides a single compression system and a process for capturing carbon dioxide (CO2) from a flue gas stream containing CO2 The disclosure also provides a process for regeneration of the carbon dioxide capture media.Type: ApplicationFiled: September 29, 2014Publication date: September 1, 2016Inventors: Vinay Amte, Asit Kumar Das, Surajit Sengupta, Manoj Yadav, Sukumar Mandal, Alok Pal, Ajay Gupta, Ramesh Bhujade, Satyanarayana Reddy Akuri, Rajeshwer Dongara
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Publication number: 20160236137Abstract: The present disclosure provides a multiple-compression system and a process for capturing carbon dioxide (CO2) from a flue gas stream containing CO2 The disclosure also provides a process for regeneration of the carbon dioxide capture media.Type: ApplicationFiled: September 29, 2014Publication date: August 18, 2016Inventors: Vinay Amte, Asit Kumar Das, Surajit Sengupta, Manoj Yadav, Sukumar Mandal, Alok Pal, Ajay Gupta, Ramesh Bhujade, Satyanarayana Reddy Akuri, Rajeshwer Dongara
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Publication number: 20160216242Abstract: A process for testing a zeolite based FCC catalyst and a ZSM-5 zeolite based FCC catalyst additive for simulating commercial plant yields is disclosed in, the present disclosure wherein the catalyst and the additive are subjected separately to a steaming protocol with 60 to 100% steam at a temperature in the range of 750° C. to 850° C. for 3 to 200 hours to obtain a catalyst and a catalyst additive deactivated under, said simulated commercial plant hydrothermal deactivation conditions. The deactivated catalyst and the deactivated catalyst additive are admixed in a pre-determined weight proportion. The obtained catalyst mixture is then used for cracking a hydrocarbon feed for a pre-determined period of time to generate cracking data. Product yields are measured from the generated cracking data at a pre-determined simulated commercial plant conversion of the hydrocarbon feed.Type: ApplicationFiled: January 28, 2014Publication date: July 28, 2016Applicant: RELIANCE INDUSTRIES LIMITEDInventors: Gopal RAVICHANDRAN, Praveen Kumar CHINTHALA, Tejas DOSHI, Arun Kumar DURAI ARASU, Amit GOHEL, Sukumar MANDAL, Asit Kumar DAS, Srikanta DINDA, Amit Kumar PAREKH
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Publication number: 20160199829Abstract: The present disclosure relates to a method for regeneration of spent ion exchange resins to obtain regenerated ion-exchange resins. The regenerated ion exchange resins can efficiently reduce the total acid number (TAN) of highly acidic crude oils. The present disclosure particularly relates to a method of treatment of spent ion exchange resins using at least one non-acidic crude oil condensate and at least one polar organic solvent.Type: ApplicationFiled: August 19, 2014Publication date: July 14, 2016Inventors: Biswajit Shown, Swapan Ghosh, Asit Kumar Das, Suyog Subhash Salgarkar, Mukunda Madhav Baishya, Mitul Amrutbhai Ladani, Chirag Dalpatbhai Panseriya
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Patent number: 9238780Abstract: The present disclosure provides a process for obtaining extracted crude oil (ECO) which is substantially free of naphthenic acids, calcium and other impurities from low asphaltic crude oils or their residue fractions by preferential extraction of saturates using at least one solvent.Type: GrantFiled: February 14, 2013Date of Patent: January 19, 2016Assignee: Reliance Industries LimitedInventors: Harender Bisht, Asit Kumar Das, Bibeka Hazarika, Biswajit Shown, D. P. S. Rana, Mahesh G. Marve, Manthan A. Malvanker, Paras N. Shah, Rohit R. Irabatti, Sukumar Mandal, Suyog S. Salgarkar