Patents by Inventor Debasis Bhattacharyya

Debasis Bhattacharyya 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).

  • Publication number: 20140175187
    Abstract: An apparatus for supplying additives into a coker drum includes an inlet for supplying a hydrocarbon feed stream into the coker drum and conduits along the circumference of walls of the coker drum. Each conduit has an injection nozzle to supply additives inside the coker drum. An injection control system controls the operation of the injection nozzles such that 1) one or more of the injection nozzles placed within a first distance above a vapour liquid interphase of the hydrocarbon feed stream are configured to supply the additives; and 2) supply of the additive discontinues from a particular injection nozzle when a distance between the injection nozzle and the vapour liquid interphase is less than or equal to a second distance. The apparatus optionally includes a mechanical drive system moving at least one of the conduits based on the level of the vapour liquid interphase in the coker drum.
    Type: Application
    Filed: October 8, 2013
    Publication date: June 26, 2014
    Applicant: INDIAN OIL CORPORATION LIMITED
    Inventors: Ram Mohan THAKUR, Pradeep Ponoly RAMACHANDRAN, Terapalli Hari Venkata DEVI PRASAD, Gautam THAPA, Debasis BHATTACHARYYA, Brijesh KUMAR, Santanam RAJAGOPAL
  • Publication number: 20130172173
    Abstract: This invention relates to a process and an apparatus for regeneration of spent FCC catalyst using multiple reactors operation resulting in wide variation of coke on spent catalyst are disclosed. This process uses an up flow regenerator with divided injection of spent catalyst based on their coke content to control the residence time for its efficient regeneration and reduced hydrothermal deactivation. This system has the advantage of minimizing the exposure to the high temperature of low coked catalyst to the minimum possible time and high coke contained catalyst to the required time for its complete regeneration.
    Type: Application
    Filed: July 4, 2011
    Publication date: July 4, 2013
    Applicant: INDIAN OIL CORPORATION LTD.
    Inventors: S. Mukthiyar, P.R. Pradeep, Debasis Bhattacharyya, V.K. Satheesh, G. Saidulu
  • Publication number: 20130168289
    Abstract: This invention provides a fluidized catalytic cracking apparatus and process for converting a hydrocarbon feedstock containing higher concentrations of Conradson Carbon Residue (CCR), metal impurities, etc into lighter products by employing two riser reactors in which the feed impurities are removed using an adsorbent in a first riser reactor and cracking a portion of first riser reactor liquid product in a second riser reactor to lighter products using the active catalyst thus eliminating the catalyst deactivation due to metal, impurities and FCC catalyst activity dilution effect to achieve a better conversion and higher catalyst longevity.
    Type: Application
    Filed: July 4, 2011
    Publication date: July 4, 2013
    Applicant: INDIAN OIL CORPORATION LTD.
    Inventors: G. Saidulu, M.K. Bhuyan, T.H.V.D. Prasad, Debasis Bhattacharyya, S. Rajagopal
  • Publication number: 20130172643
    Abstract: A two stage Fluid Catalytic Cracking process and an apparatus for simultaneous production of light olefins such as ethylene and propylene and middle distillate range hydrocarbons, wherein a first flow reactor, preferably a downer and a second flow reactor, preferably a riser are operating at varying reaction severities using different catalyst systems with the regenerated catalyst entering the reactors inlet through independent regenerators. Mild cracking of the fresh feedstock is carried out in the first flow reactor of short residence time and the effluent of first flow reactor is separated in an intermediate separator/fractionator followed by re-cracking of the C4 hydrocarbons and naphtha range hydrocarbons, preferably C5-150° C. from the second product separation section and unconverted hydrocarbons (370° C.+) of first flow reactor, in the second flow reactor at higher severity employing different catalyst system.
    Type: Application
    Filed: July 4, 2011
    Publication date: July 4, 2013
    Applicant: INDIAN OIL CORPORATION LTD.
    Inventors: P.R. Pradeep, S. Mukthiyar, G. Saidulu, Debasis Bhattacharyya, V.K. Satheesh
  • Publication number: 20130056393
    Abstract: The invention provides for a process and apparatus for simultaneous conversion of lighter and heavier hydrocarbon feedstocks into improved yields of light olefins in the range of C2 to C4, liquid aromatics in the range C6 to C8 mainly benzene, toluene, xylene and ethyl benzene and other useful products employing at least two different reactors operated in series with respect to catalyst flow and parallel with respect to feed flow under different regimes and process conditions with same catalyst system.
    Type: Application
    Filed: March 30, 2011
    Publication date: March 7, 2013
    Applicant: INDIAN OIL CORPORATION LIMITED
    Inventors: Saravanan Subramani, Debasis Bhattacharyya, Reshmi Manna, Satyen Kumar Das, Tridib Sarkar, Santanam Rajagopal
  • Publication number: 20130020234
    Abstract: An apparatus for catalytic cracking of feedstock includes a first channel in which a feedstock is treated with an adsorbent to obtain a treated intermediate. The apparatus further comprises a separator-reactor vessel. The separator-reactor vessel includes an adsorbent separating region to remove the adsorbent from the treated intermediate. The separator-reactor vessel further includes a second channel connected to the adsorbent separating region. The treated intermediate is contacted with a catalyst in the second channel to produce a cracking yield. The second channel terminates in a catalyst separating region of the separator-reactor vessel. The catalyst is removed from the cracking yield in the catalyst separating region. The separator-reactor vessel further includes a physical partition disposed between the adsorbent separating region and the catalyst separating region to separate the two regions.
    Type: Application
    Filed: March 30, 2011
    Publication date: January 24, 2013
    Applicant: INDIAN OIL CORPORATION LIMITED
    Inventors: Debasis Bhattacharyya, Gadari Saidulu, Arumugam Velayutham Karthikeyani, Pankaj Kasliwal, Bandaru Venkata Hari Prasad Gupta, Ram Mohan Thakur, Jagdev Kumar Dixit, Sudipta Roy, Ganga Shanker Mishra, Satyen Kumar Das, Santanam Rajagopal
  • Publication number: 20120024748
    Abstract: The present invention relates to a fluidized catalytic cracking process for cracking hydrocarbon feed having organo-sulfur compound as an impurity, said process comprising: adding a heavy metal poisoned spent catalyst to an equilibrium catalyst to obtain a composite circulating catalyst, wherein the heavy metal poisoned spent catalyst is added in an amount to maintain the activity of the circulating catalyst; and obtaining a fluidized catalytic cracked product. The present invention further relates to fluidized catalytic cracked product obtained by the process of the present invention. The sulfur content of the fluidized catalytic cracked product mainly gasoline which is boiling in the range of C5-250° C. reduced by more than 20% (wt/wt). And Research Octane number of the fluidized catalytic cracked product is increased by more than 1 unit.
    Type: Application
    Filed: March 29, 2010
    Publication date: February 2, 2012
    Inventors: Saravanan Subramani, Debasis Bhattacharyya, Karthikeyani Arumugam Velayutham, Pankaj Kumar Kasliwal, Krishnan Venkatachalam
  • Patent number: 7604731
    Abstract: A process is disclosed for producing needle coke from heavy atmospheric distillation residues having sulfur no more than 0.7 wt %, which process involves the steps of heating the feedstock to a temperature in the range of 440 to 520° C. for thermal cracking in a soaking column under pressure in the range of 1 to 10 kg/cm2 to separate the easily cokable material, separating the cracked products in a quench column and a distillation column and then subjecting the hydrocarbon fraction from the bottom of the quench column and a hydrocarbon fraction having a boiling point in the range of 380 to 480° C. from the distillation column and/or any other suitable heavier hydrocarbon streams in a definite ratio depending on certain characteristic parameters to thermal cracking in a second soaking column at a temperature of 460 to 540° C.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: October 20, 2009
    Assignee: Indian Oil Corporation Limited
    Inventors: Debasis Bhattacharyya, Satheesh Vetterkunnel Kumaran, Bandaru Venkata Hari Prasad Gupta, Pramod Kumar, Asit Kumar Das, Gadari Saidulu, Satyen Kumar Das, Gurpreet Singh Kapur, Veena Bansal, Venkatachalam Krishnan, Satish Makhija, Sobhan Ghosh, Niranjan Raghunath Raje
  • Patent number: 7462275
    Abstract: The present invention relates to a process for the conversion of hydrocarbon streams with 95% true boiling point less than 400° C. to very high yield of liquefied petroleum gas in the range of 45-65 wt % of feed and high octane gasoline, the said process comprises catalytic cracking of the hydrocarbons using a solid fluidizable catalyst comprising a medium pore crystalline alumino-silicates with or without Y-zeolite, non crystalline acidic materials or combinations thereof in a fluidized dense bed reactor operating at a temperature range of 400 to 550° C., pressure range of 2 to 20 kg/cm2 (g) and weight hourly space velocity in range of 0.1 to 20 hour?1, wherein the said dense bed reactor is in flow communication to a catalyst stripper and a regenerator for continuous regeneration of the coked catalyst in presence of air and or oxygen containing gases, the catalyst being continuously circulated between the reactor-regenerator system.
    Type: Grant
    Filed: July 20, 2004
    Date of Patent: December 9, 2008
    Assignee: Indian Oil Corporation Limited
    Inventors: Asit Kumar Das, Debasis Bhattacharyya, Gadari Saidulu, Satayen Kumar Das, Bandaru Venkata Hari P. Gupta, Ramakrishnan Ramanarayanan, Latoor Lal Saroya, Konduri Lakshminarayana, Marri Rama Rao, Vinod Ramchandra Upadhyay, Sukumar Mandal, Deepa Meghavathu, Arumugam Velayutham Karthikeyani, Wadharwa Ram Kalsi, Arvind Pratap Singh, Veena Bansal, Ashok Kumar Tiwari, Venkatachalam Krishnan, Satish Makhija, Sobhan Ghosh, Niranjan Raghunath Raje
  • Publication number: 20070181462
    Abstract: A process is disclosed for producing needle coke from heavy atmospheric distillation residues having sulfur no more than 0.7 wt %, which process involves the steps of heating the feedstock to a temperature in the range of 440 to 520° C. for thermal cracking in a soaking column under pressure in the range of 1 to 10 kg/cm2 to separate the easily cokable material, separating the cracked products in a quench column and a distillation column and then subjecting the hydrocarbon fraction from the bottom of the quench column and a hydrocarbon fraction having a boiling point in the range of 380 to 480° C. from the distillation column and/or any other suitable heavier hydrocarbon streams in a definite ratio depending on certain characteristic parameters to thermal cracking in a second soaking column at a temperature of 460 to 540° C.
    Type: Application
    Filed: July 15, 2004
    Publication date: August 9, 2007
    Inventors: Debasis Bhattacharyya, Satheesh Kumaran, Bandaru Prasad Gupta, Pramod Kumar, Asit Das, Gadari Saidulu, Satyen Das, Gurpreet Kapur, Veena Bansal, Venkatachalam Krishnan, Satish Makhija, Sobhan Ghosh, Niranjan Raje
  • Patent number: 7029571
    Abstract: According to this invention, there is provided a process and apparatus for catalytic cracking of various petroleum based heavy feed stocks in the presence of solid zeolite catalyst and high pore size acidic components for selective bottom cracking and mixtures thereof, in multiple riser type continuously circulating fluidized bed reactors operated at different severities to produce high yield of middle distillates, in the range of 50–65 wt % of fresh feed.
    Type: Grant
    Filed: February 16, 2000
    Date of Patent: April 18, 2006
    Assignee: Indian Oil Corporation Limited
    Inventors: Debasis Bhattacharyya, Asit Kumar Das, Arumugam Velayutham Karthikeyani, Satyen Kumar Das, Pankaj Kasliwal, Manoranjan Santra, Latoor Lal Saroya, Jagdev Kumar Dixit, Ganga Sanker Mishra, Jai Prakash Singh, Satish Makhija, Sobhan Ghosh
  • Publication number: 20060016725
    Abstract: The present invention relates to a process for the conversion of hydrocarbon streams with 95% true boiling point less than 400° C. to very high yield of liquefied petroleum gas in the range of 45-65 wt % of feed and high octane gasoline, the said process comprises catalytic cracking of the hydrocarbons using a solid fluidizable catalyst comprising a medium pore crystalline alumino-silicates with or without Y-zeolite, non crystalline acidic materials or combinations thereof in a fluidized dense bed reactor operating at a temperature range of 400 to 550° C., pressure range of 2 to 20 kg/cm2(g) and weight hourly space velocity in range of 0.1 to 20 hour?1, wherein the said dense bed reactor is in flow communication to a catalyst stripper and a regenerator for continuous regeneration of the coked catalyst in presence of air and or oxygen containing gases, the catalyst being continuously circulated between the reactor-regenerator system.
    Type: Application
    Filed: July 20, 2004
    Publication date: January 26, 2006
    Inventors: Asit Das, Debasis Bhattacharyya, Gadari Saidulu, Satayen Das, Bandaru Gupta, Ramakrishnan Ramanarayanan, Latoor Saroya, Konduri Lakshminarayana, Marri Rao, Vinod Upadhyay, Sukumar Mandal, Deepa Meghavathu, Arumugam Karthikeyani, Wadharwa Kalsi, Arvind Singh, Veena Bansal, Ashok Tiwari, Venkatachalam Krishnan, Satish Makhija, Sobhan Ghosh, Niranjan Raje
  • Publication number: 20050284793
    Abstract: A process is disclosed for producing needle coke from heavy atmospheric distillation residues having sulfur no more than 0.7 wt %, which process involves the steps of heating the feedstock to a temperature in the range of 460 to 540° C. for thermal cracking in a soaking column under pressure in the range of 1 to 10 kg/cm2 to separate the easily cokable material, separating the cracked products in a quench column and a distillation column and then subjecting the hydrocarbon fraction from the bottom of the quench column and a heavy gas oil fraction having 10% true boiling point more than 370° C. and 90% true boiling point not less than 480° C. from the distillation column and/or any other suitable heavier hydrocarbon streams in a definite ratio depending on certain characteristic parameters to thermal cracking in a second soaking column at a temperature of 440 to 520° C.
    Type: Application
    Filed: July 15, 2004
    Publication date: December 29, 2005
    Inventors: Debasis Bhattacharyya, Satheesh Kumaran, Bandaru Prasad Gupta, Pramod Kumar, Asit Das, Gadari Saidulu, Satyen Das, Gurpreet Kapur, Veena Bansal, Venkatachalam Krishnan, Satish Makhija, Sobhan Ghosh, Niranjan Raje
  • Patent number: 6656344
    Abstract: A sequential processing for heavy petroleum residues is disclosed which uses a separate mixture of catalyst and adsorbent. The solid adsorbent and FCC (fluids catalytic cracking) catalyst particles differ significant at least on particle size or density or both. The adsorbent preferably consist of calcined coke or metal oxides of Al, Si, or Mg having enhanced ability of selectively capture different impurities of the residual oil. The adsorbent particles first treat the residual hydrocarbons in the riser bottom end subsequently the actual catalyst tales care of catalytic cracking in the upper section of the riser. The spent solid mixture is fed to the catalyst separator which uses steam at sufficiently high velocity but at lower temperature to lift the catalyst particles out of the separator. Such a novel low temperature faster separation minimizes Vanadium mobility and deactivation of the catalyst. A net coke stream is withdrawn from the separator/burner especially while processing residues above 5 wt % CCR.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: December 2, 2003
    Inventors: Marri Rama Rao, Vutukuru Lakshmi Narasimha Murthy, Sanjeev Singh, Asit Kumar Das, Sobhan Ghech, Debasis Bhattacharyya, Sansh Makhija, Sukumar Mandal
  • Patent number: 6267873
    Abstract: A fluidized catalytic cracking process for catalytically cracking a feed to lighter products includes introducing a heated catalyst and the feed into a bottom riser of a fluidized catalytic cracking apparatus and allowing the heated catalyst and the feed to preaccelerate upwardly within the bottom riser as a mixture; flowing the mixture upwardly from the bottom riser through a plurality of microriser tubes disposed within a regenerator under conditions effective to cause a cracking reaction of the hydrocarbons and result in a mixture including coked catalyst and hydrocarbon vapors; passing the mixture from the microriser tubes through a catalyst separator for separating the coked catalyst from the hydrocarbon vapors; collecting coked catalyst in a stripper for stripping out hydrocarbon vapors carried along with the coked catalyst and introducing the coked catalyst collected into a regenerator; simultaneous with flowing the mixture, combusting the coked catalyst within the regenerator under conditions effectiv
    Type: Grant
    Filed: November 30, 1998
    Date of Patent: July 31, 2001
    Assignee: Indian Oil Corporation, Ltd.
    Inventors: Asit Kumar Das, Debasis Bhattacharyya, Sukumar Mandal, Vutukuru Lakshmi Narasimha Murthy, Sanjeev Singh, Marri Rama Rao, Sobhan Ghosh
  • Patent number: 6153089
    Abstract: A process for converting undesirable olefinic hydrocarbon streams to hydrogen and petrochemical feedstock e.g. light olefins in C.sub.2 -C.sub.4 range and aromatics especially toluene and xylenes, which comprises simultaneous cracking and reforming at olefin rich hydrocarbons using a catalyst consisting of dehydrogenating metal components, shape selective zeolite components and large pore acidic components in different proportions in a circulating fluidized bed reactor-regenerator system having reactor temperature within 450-750.degree. C. and WHSV of 0.1-60 hour.sup.-1.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: November 28, 2000
    Assignee: Indian Oil Corporation Limited
    Inventors: Asit Kumar Das, Sukumar Mandal, Sobhan Ghosh, Debasis Bhattacharyya, Ganga Shanker Mishra, Jagdev Kumar Dixit, Arvind Pratap Singh, Ashok Kumar Tewari, Satish Makhija, Manoranjan Santra, Latoor Lal Saroya, Shankar Sharma, Satyen Kumar Das
  • Patent number: 6149875
    Abstract: A fluidized catalytic cracking apparatus includes a riser containing a regenerated catalyst and adsorbant, and has a first inlet for introduction of high velocity steam, a second inlet for introduction of a feed stream containing heavy residual fractions with high concentrations of conradson coke, metals including vanadium and nickel, and additional poisons including nitrogen, a third inlet for introduction of an adsorbent, and a fourth inlet disposed above the third inlet means for introduction of a regenerated catalyst, the adsorbent having a particle size which is larger than that of the regenerated catalyst.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: November 21, 2000
    Assignee: Indian Oil Corporation, Limited
    Inventors: Marri Rama Rao, Vutukuru Lakshmi Narasimha Murthy, Sanjeev Singh, Asit Kumar Das, Sobhan Ghosh, Debasis Bhattacharyya, Satish Makhija, Sukumar Mandal
  • Patent number: 6027696
    Abstract: A fluidized catalytic cracking apparatus for catalytically cracking a heavy hydrocarbon feed to lighter products includes a regenerator shell for heating spent catalyst, the regenerator shell having a bottom riser for introduction of the heavy hydrocarbon feed, a catalyst, and steam, and from which flows a stream, the bottom riser having a distributor for allowing the stream from the bottom riser to be distributed into a plurality of reaction tubes positioned within the regenerator shell; a catalyst separator connected to an upper end of the regenerator shell; a stripper connected to the catalyst separator to cause a stripping of the catalyst and the spent catalyst feed to the regenerator shell; and an air inlet provided in the regenerator shell so as to cause a combustion within the regenerator shell.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: February 22, 2000
    Assignee: Indian Oil Corporation Ltd.
    Inventors: Asit Kumar Das, Debasis Bhattacharyya, Sukumar Mandal, Vutukuru Lakshmi Narasimh Murthy, Sanjeev Singh, Marri Rama Rao, Sobhan Ghosh
  • Patent number: 5846402
    Abstract: A process for selective catalytic cracking of a petroleum-based feedstock to produce a product having a high yield of liquified petroleum gas (LPG) and light olefins having 3 to 4 carbons includes providing a fluidized bed reactor which is a high velocity riser, continuously circulating fluidized bed reactor; providing a solid acidic catalyst comprised of: from 1 to 6% by wt. of ultra stable Y-zeolite; from 8-25% by wt. of Pentasil zeolite which is shape selective; from 0-8% by wt. of an active material which is bottom selective; from 0-1% by wt. of rare earth constituents; and from 91 to 60% by wt. of nonacidic constituents and binder; charging the fluidized bed reactor with the solid acidic catalyst and the petroleum-based feedstock; and cracking the petroleum-based feedstock in the presence of the solid acidic catalyst in the fluidized bed reactor. The reactor is operated at a Weight Hourly Space Velocity (WHSV) ranging from 40 to 120 hr.sup.
    Type: Grant
    Filed: May 14, 1997
    Date of Patent: December 8, 1998
    Assignee: Indian Oil Corporation, Ltd.
    Inventors: Sukumar Mandal, Suresh Kumarshah, Debasis Bhattacharyya, Vutukuru Lakshmi Narasimha Murthy, Asit Kumar Das, Sanjeev Singh, Ram Mohan Thakur, Shankar Sharma, Jagdev Kumar Dixit, Sobhan Ghosh, Satyen Kumar Das, Manoranjan Santra, Latoor Lal Saroya, Marri Rama Rao, Ganga Shanker Mishra, Satish Makhija