Patents by Inventor Venkatachalam Krishnan

Venkatachalam Krishnan 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).

  • Patent number: 9873096
    Abstract: The present subject matter relates to a feed nozzle assembly 100 for atomizing a heavy hydrocarbon feed by mixing the hydrocarbon feed with a diluent and an atomizing media. The feed nozzle assembly 100 includes at least one primary mixing chambers 101 for receiving the liquid hydrocarbon feed and the diluent to create a primary mixture. The primary mixture is than forwarded to a secondary mixing chamber 102. The secondary mixing chamber extends to a tertiary mixing chamber 103. A steam inlet 110 is provided to inject streams of steam to the secondary mixing chamber 102 and to the tertiary mixing chamber 103 through a first opening and a second opening, respectively, located within the steam inlet 110.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: January 23, 2018
    Assignee: INDIAN OIL CORPORATION LIMITED
    Inventors: Bidyut De, Pankaj Kumar Kasliwal, Debasis Bhattacharyya, Venkatachalam Krishnan, Santanam Rajagopal
  • Patent number: 7968079
    Abstract: The present disclosure provides a ready-to-use seed composition water, a source of silica, a source of alumina, and Na20, wherein the molar ratio of H20:Na20 ranges from 5 to 20, Na20:SiO2 ranges from 0.4 to 5 and SiO2:Al203 ranges from 1.3 to 5 used in the preparation of a synthetic faujasite zeolite which has high thermal stability and higher crystallite size. It further provides a process for preparing the ready-to-use seed composition for preparation of synthetic faujasite zeolite that requires lower crystallization time. The present disclosure provides a seed composition that does not require maturing time and a reaction gel composition that has low water and soda content. The present disclosure further provides a process for the preparation of synthetic faujasite zeolite by blending seed and reaction gel reaction composition to form a seed gel composition and subjecting it to crystallization.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: June 28, 2011
    Assignee: Indian Oil Corporation Limited
    Inventors: Biswanath Sarkar, Kapil Arya, Gopal Ravichandran, Mohan Prabhu Kuvettu, Shiba Prasad Choudhury, Venkatachalam Krishnan, Sanjay Kumar Ray, Jayaraj Christopher, Satish Makhija
  • 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: 7517827
    Abstract: The present invention relates to a cracking catalyst composition for cracking heavy hydrocarbon and processes for preparing the catalyst. The process can include treating zeolite with sodium free basic compound with or without phosphate, treating an alumina with a dilute acid, acidifying a colloidal silica, preparing a fine slurry of clay with a source of phosphate, adding alumina slurry and/or acidified colloidal silica to clay phosphate slurry, adding treated zeolite and spray-drying the slurry and calcining the same to obtain a cracking catalyst having adequate ABD and attrition resistance property.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: April 14, 2009
    Assignee: Indian Oil Company Ltd
    Inventors: Gopal Ravichandran, Biswanath Sarkar, Mohan P. Kuvettu, Deepa Megavathu, Sanjay K Ray, Shiba P. Choudhury, Sudipta Roy, Venkatachalam Krishnan, Satish Makhija
  • 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: 20080182744
    Abstract: The present disclosure provides a ready-to-use seed composition used in the preparation of a synthetic faujasite zeolite which has high thermal stability and higher crystallite size. It further provides a process for preparing the ready-to-use seed composition for preparation of synthetic faujasite zeolite that requires lower crystallization time. The present disclosure provides a seed composition that does not require maturing time and a reaction gel composition that has low water and soda content. The present disclosure further provides a process for the preparation of synthetic faujasite zeolite by blending seed and reaction gel reaction composition to form a seed gel composition and subjecting it to crystallization.
    Type: Application
    Filed: January 8, 2008
    Publication date: July 31, 2008
    Applicant: INDIAN OIL CORPORATION LIMITED
    Inventors: Biswanath SARKAR, Kapil ARYA, Gopal RAVICHANDRAN, Mohan Prabhu KUVETTU, Shiba Prasad CHOUDHURY, Venkatachalam KRISHNAN, Sanjay Kumar RAY, Jayaraj CHRISTOPHER, Satish MAKHIJA
  • Publication number: 20070203017
    Abstract: The present invention relates to a cracking catalyst composition for cracking heavy hydrocarbon and processes for preparing the catalyst. The process can include treating zeolite with sodium free basic compound with or without phosphate, treating an alumina with a dilute acid, acidifying a colloidal silica, preparing a fine slurry of clay with a source of phosphate, adding alumina slurry and/or acidified colloidal silica to clay phosphate slurry, adding treated zeolite and spray-drying the slurry and calcining the same to obtain a cracking catalyst having adequate ABD and attrition resistance property.
    Type: Application
    Filed: August 17, 2006
    Publication date: August 30, 2007
    Inventors: Gopal Ravichandran, Biswanath Sarkar, Mohan P. Kuvettu, Deepa Megavathu, Sanjay K. Ray, Shiba P. Choudhury, Sudipta Roy, Venkatachalam Krishnan, Satish Makhija
  • 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
  • Publication number: 20070059238
    Abstract: The present invention relates to a process for enhancing the yield of molecular sieve zeolite during the synthesis from a sodium aluminosilicate reaction mixture, said process comprising the step of adding at an intermediate stage of crystallization a source of aluminum to the sodium aluminosilicate reaction mixture and allowing the mixture to crystallize.
    Type: Application
    Filed: May 30, 2006
    Publication date: March 15, 2007
    Inventors: Ram Thakur, Mohan Kuvettu, Biswanath Sarkar, Venkatachalam Krishnan, Mitra Patel, Sanjay Ray, Gopal Ravichandran, 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
  • Publication number: 20050158237
    Abstract: The present invention relates to a process for enhancing the yield of molecular sieve zeolite during the synthesis from a sodium aluminosilicate reaction mixture, said process comprising the step of adding at an intermediate stage of crystallization a source of aluminum to the sodium aluminosilicate reaction mixture and allowing the mixture to crystallize.
    Type: Application
    Filed: January 16, 2004
    Publication date: July 21, 2005
    Applicant: INDIAN OIL CORPORATION LIMITED
    Inventors: Ram Thakur, Mohan Kuvettu, Biswanath Sarkar, Venkatachalam Krishnan, Mitra Patel, Sanjay Ray, Gopal Ravichandran, Satish Makhija, Sobhan Ghosh
  • Patent number: 6528447
    Abstract: A process for preparing a hydrocarbon conversion catalyst for use in a Fluid Catalyst Cracking (FCC) unit includes the steps of preparing a modified alumina-silica composite by reacting alumina with an acid to obtain an acidified alumina, aging the acidified alumina for from 0.25 to 60 hours, adding a silica source to the acidified alumina to obtain the composite; preparing a dispersed precursor slurry of the modified alumina-silica composite, and a rare earth exchanged USY zeolite (REUSY) containing at least one rare earth oxide present in an amount ranging from 3.8 to 4.0 wt %, and optionally kaolin clay; spray-drying the slurry to obtain spherical particles; and subjecting the spherical particles to calcination.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: March 4, 2003
    Assignee: Indian Oil Corporation Limited
    Inventors: Sobhan Ghosh, Satish Makhija, Venkatachalam Krishnan, Sanjay Kumar Ray, Mohan Prabhu Kuvettu
  • Patent number: 6355591
    Abstract: A fluid catalytic cracking additive composition to obtain enhanced yield of Liquified Petroleum Gas in catalytic cracking of high boiling petroleum feed stocks comprising 4 to 20 wt. % aluminum phosphate composite, 1-40 wt. % crystalline molecular sieve Zeolites from the group selected from mordenite ZSM-5, Beta and mixtures thereof and 40-90 wt. % clay.
    Type: Grant
    Filed: January 3, 2000
    Date of Patent: March 12, 2002
    Assignee: Indian Oil Corporation Limited
    Inventors: Mohan Prabhu Kuvettu, Gopal Ravi Chandran, Sanjay Kumar Ray, Kamlesh Gupta, Ganga Shankar Misra, Venkatachalam Krishnan, Mitra Bhanu Patel, Satish Makhija, Sobhan Ghosh
  • Patent number: 6284218
    Abstract: A synthetic faujasite zeolite and a process for preparing the same which includes forming a reaction mixture consisting essentially of water, a source of silica, a source of alumina, Na2O nd nucleation centers, wherein the reaction mixture has molar ratios of constituents including Na2O/SiO2, 0.4-0.9; SiO2/Al2O3, 7-13; and H2O/Na2O, 30-45, and wherein the nucleation centers have molar ratios of constituents including Na2O/SiO2, 0.5-2.0; SiO2/Al203, 10-20; and H2O/Na2O, 10-40; and heating the reaction mixture to a temperature ranging from 90 to 110° C. for a time period ranging from 23 to 29 hours to obtain the synthetic faujasite zeolite, wherein the synthetic faujasite zeolite has a crystallite size ranging from 1500 to 2000 Å, a particle size ranging from 4000 to 8000 Å, and a retention of surface of more than 70% of that of a parent zeolite, when exchanged with ammonia and subjected to hydrothermal treatment at 650° C. for 3 hours and with 100% steam.
    Type: Grant
    Filed: September 23, 1998
    Date of Patent: September 4, 2001
    Assignee: Indian Oil Corporation Limited
    Inventors: Mohan Prabhu Kuvettu, Manoranjan Santra, Venkatachalam Krishnan, Sanjay Kumar Ray, Christopher J, Ganga Shanker Mishra, Ram Mohan Thakur, Satish Makhija, Soban Ghosh