Patents by Inventor Rakesh Sarin
Rakesh Sarin 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: 8353972Abstract: Disclosed is a novel synthetic fuel as alternative to diesel, wherein said synthetic fuel comprises branched esters and wherein the fuel having improved fuel properties such as zero aromatic, zero olefin, zero sulphur, low pour, high cetane diesel fuel with improved lubricity and oxidative stability. Further, the present invention provides a method of preparation of said esters.Type: GrantFiled: February 4, 2008Date of Patent: January 15, 2013Assignee: Indian Oil Corporation LimitedInventors: Rakesh Sarin, Ravindra Kumar, Suresh Kumar Puri, Anurag Ateet Gupta, Ravinder Kumar Malhotra, Satish Makhija
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Patent number: 7789918Abstract: The present invention relates to a additive composition for use as lubricity improver for low sulphur diesel, comprising c) 0.1-10% by weight of ester derivative derived from cashew nut shell liquid (CNSL esters) of formula (I); f) 0.1-10% by weight of ester derivative derived from cashew nut shell liquid of formula (II); g) 50-95% by weight of free fatty acid of the formula RCOOH in which R represents an alkyl/alkenyl group with 12 to 24 carbon atoms. h) 1-30% by weight of synthetic esters derived by esterifying tri, tetra, penta hydric alcohols with carboxylic acids such as lauric, palmitic, linoleic, ricinoleic etc.Type: GrantFiled: August 9, 2004Date of Patent: September 7, 2010Assignee: Indian Oil Corporation LimitedInventors: Deepak Kumar Tuli, Ajay Kumar Arora, Shanti Prakash, Rajiv Ranjan, Krishan Kumar Swami, Ajay Kumar, Rakesh Sarin, Ram Prakash Verma, Niranjan Raghunath Raje
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Publication number: 20090217571Abstract: Disclosed herein is a method for producing ultra-low-sulfur content hydrocarbon fuel and product thereof. The method comprises selective biocatalytic oxidation of sulfur containing compounds present in the fuels employing enzyme lipase as biocatalyst in presence of controlled and incremental amount of hydrogen peroxide and carboxylic acid without using water or any co-factor for the reactivity of said enzymes.Type: ApplicationFiled: October 28, 2005Publication date: September 3, 2009Applicant: Indian Oil Corporation LimitedInventors: Mahendra Pratap Singh, Manoj Kumar, Wadhava Ram Kalsi, Alex Cheru Pulikottil, Rakesh Sarin, Deepak Kumar Tuli, Ravinder Kumar Malhotra, Ram Prakash Verma, Brij Mohan Bansal
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Publication number: 20090038211Abstract: Disclosed is a novel synthetic fuel as alternative to diesel, wherein said synthetic fuel comprises branched esters and wherein the fuel having improved fuel properties such as zero aromatic, zero olefin, zero sulphur, low pour, high cetane diesel fuel with improved lubricity and oxidative stability. Further, the present invention provides a method of preparation of said esters.Type: ApplicationFiled: February 4, 2008Publication date: February 12, 2009Applicant: Indian Oil Corporation LimitedInventors: Rakesh Sarin, Ravindra Kumar, Suresh Kumar Puri, Anurag Ateet Gupta, Ravinder Kumar Malhotra, Satish Makhija
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Patent number: 7473283Abstract: The present invention provides a fuel additive composition for stabilizing blends of ethanol and a hydrocarbon boiling in the gasoline or diesel range, comprising: a) 0.1-10% of Cashew Nut Shell Liquid (CNSL) derivative(s) or mixtures thereof of formula (I) where m=0-12, n=0, 2, 4 & 6 and b) 0.1-10% of an organic co-solvent depending upon the percentage composition of diesel and ethanol blend.Type: GrantFiled: June 26, 2002Date of Patent: January 6, 2009Assignee: Indian Oil Corporation, LimitedInventors: Deepak Kumar Tuli, Rakesh Sarin, Krishan Kumar Swami, Shanti Parkash, Rajeev Ranjan, Niranjan Raghunath Raje, Ram Prakash Verma, Akhilesh Kumar Bhatnagar
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Patent number: 7427303Abstract: The present invention relates a surfactant composition for use as an emulsifier in water blended fuel mixture. The said composition includes ethoxylate of cashew nut shell liquid. In addition ethoxylate of cashew nut shell liquid, the said composition comprises a co-surfactant having a hydrophilic lipophilic balance in the range of 4 to 12 and a polymeric dispersant. The water blended fuel mixture using emulsifiers of the present invention, overcome some of the shortcomings of the previously known emulsions. The ethoxylate of cashew nut shell liquid is of the formula (I).Type: GrantFiled: August 27, 2002Date of Patent: September 23, 2008Assignee: Indian Oil Corporation LimitedInventors: Rakesh Sarin, Deepak Kumar Tuli, Shanti Parkash, Krishan Kumar Swami, Rajiv Ranjan, Ram Prakash Verma, Niranjan Raghunath Raje, Akhilesh Kumar Bhatnagar
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Patent number: 7396802Abstract: The reaction of the disulphided oil, as obtained from the caustic wash of liquefied petroleum gas, with 2,3,8,9,13,14-hexathia-5,6,11,12 -tetraazatricyclo [8.2.1.14,7]tetradeca-4,6,10,12-tetraene was carried out in one pot and one step to yield a corrosion inhibiting composition comprising predominantly of 2,5-bis(methyldithio)-1,3,4-thiadiazole, 2-methylthio-5-ethylthio-1,3,4-thiadiazole and 2,5-bis(ethyldithio)-1,3,4-thiadiazole, for application in fuels, lubes and greases.Type: GrantFiled: July 25, 2002Date of Patent: July 8, 2008Assignee: Indian Oil Corporation LimitedInventors: Pankaj Kumar Mondal, Khem Chand Dohhen, Rakesh Sarin, Deepak Kumar Tuli, Ram Prakash Verma, Akhilesh Kumar Bhatnagar
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Publication number: 20080098642Abstract: The present invention relates to a additive composition for use as lubricity improver for low sulphur diesel, comprising c) 0.1-10% by weight of ester derivative derived from cashew nut shell liquid (CNSL esters) of formula (I); f) 0.1-10% by weight of ester derivative derived from cashew nut shell liquid of formula (II); g) 50-95% by weight of free fatty acid of the formula RCOOH in which R represents an alkyl/alkenyl group with 12 to 24 carbon atoms. h) 1-30% by weight of synthetic esters derived by esterifying tri, tetra, penta hydric alcohols with carboxylic acids such as lauric, palmitic, linoleic, ricinoleic etc.Type: ApplicationFiled: August 9, 2004Publication date: May 1, 2008Inventors: Deepak Kumar Tuli, Ajay Kumar Arora, Shanti Prakash, Rajiv Ranjan, Krishan Kumar Swami, Ajay Kumar, Rakesh Sarin, Ram Prakash Verma, Niranjan Raghunath Raje
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Publication number: 20060094890Abstract: Disclosed herein is a single pot process for producing biodiesel and the product thereof, using non-edible oil sources containing free fatty acid. The process comprises esterification and transesterification of non-edible vegetable oil sources containing free fatty acids in a single pot employing a water scavenger or a water adsorbent or a mixture thereof.Type: ApplicationFiled: March 11, 2005Publication date: May 4, 2006Inventors: Meeta Sharma, Ravindra Kumar, Sinha Ray, Rakesh Sarin, Ravinder Malhotra, Ram Verma, Niranjan Raghunath
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Publication number: 20050160661Abstract: The present invention provides a fuel additive composition for stabilizing blends of ethanol and a hydrocarbon boiling in the gasoline or diesel range, comprising: a) 0.1-10% of Cashew Nut Shell Liquid (CNSL) derivative(s) or mixtures thereof of formula (I) where m=0-12, n=0, 2, 4 & 6 and b) 0.1-10% of an organic co-solvent depending upon the percentage composition of diesel and ethanol blend.Type: ApplicationFiled: June 26, 2002Publication date: July 28, 2005Applicant: Indian Oil CorporationInventors: Deepak Tuli, Rakesh Sarin, Krishan Swami, Shanti Parkash, Rajeev Ranjan, Niranjan Raje, Ram Verma, Akhilesh Bhatnagar
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Publication number: 20050032654Abstract: The reaction of the disulphided oil, as obtained from the caustic wash of liquefied petroleum gas, with 2,3,8,9,13,14-hexathia-5,6,11,12-tetraz [8.2.1.14,7]tetradeca4,6,10,12-tetraene was carried out in one pot and one step to yield a corrosion inhibiting composition comprising predominantly of 2,5-bis(methyldithio)-1,3,4-thiadiazole, 2-methylthio-5-ethylthio-1,3,4-thiadiazole and 2,5-bis(ethyldithio)-1,3,4-thiadiazole, for application in fuels, lubes and greases.Type: ApplicationFiled: May 10, 2004Publication date: February 10, 2005Inventors: Pankaj Mondal, Khem Dohhen, Rakesh Sarin, Deepak Tuli, Ram Verma, Akhilesh Bhathnagar
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Publication number: 20050022445Abstract: The present invention relates a surfactant composition for use as an emulsifier in water blended fuel mtixture. The said composition includes ethoxylate of cashew nut shell liquid. In addition ethoxylate of cashew nut shell liquid, the said composition comprises a co-surfactant having a hydrophilic lipophilic balance in the range of 4 to 12 and a polymeric dispersant. The water blended fuel mixture using emulsifers of the present invention, overcome some of the shortcomings of the previously known emulsions. The ethoxylate of cashew nut shell liquid is of the formula (I).Type: ApplicationFiled: August 27, 2002Publication date: February 3, 2005Inventors: Rakesh Sarin, Deepak Tuli, Shanti Parkash, Krishan Swami, Rajiv Ranjan, Ram Verma, Niranjan Raje, Akhilesh Bhatnagar
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Patent number: 6660696Abstract: Phosphorothionate derivatives derived from cashew nut shell liquid (CNSL) for use as an thermally stable antioxidant, antiwear, friction reducing and extreme pressure additive in a lubricant composition are synthesized by the steps of (a) partially hydrogenating distilled technical cashew nut shell liquid with palladium or nickel or platinum catalyst; to hydrogenate the olefinic chain; (b) reacting partially hydrogenated technical cashew nut shell liquid with phosphorus trihalide and sulphur, the reaction being carried out at a temperature ranging from 20 to 220° C. A lubricant containing a major proportion of a material selected from the group consisting of an oil of lubricating viscosity or a grease; and remainder an additive including CNSL phosphorothionate derivative, prepared by the foregoing process.Type: GrantFiled: June 20, 2002Date of Patent: December 9, 2003Assignee: Indian Oil Corporation LimitedInventors: Rajeev Ranjan, Ajay Kumar Arora, Rakesh Sarin, Deepak Kumar Tuli, Ram Prakash Verma, Akhilesh Kumar Bhatnagar
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Patent number: 6638898Abstract: A process for the preparation of multi-functional additive, amino di(alkylcyclohexyl) phosphorodithioate, for use as an additive in a lubricant composition so as to impart improved coefficient of friction, wear reduction, antioxidant and extreme pressure properties, including the steps of (a) hydrogenating distilled technical cashew nut shell liquid with palladium or nickel or platinum catalyst; to fully hydrogenate the olefinic chain and aromatic ring of the precursor; (b) reacting fully hydrogenated technical cashew nut shell liquid with phosphorus pentasulfide to obtain unpolymerized hydrogenated cashew nut shell liquid phosphorodithioic acid, the reaction being carried out at a temperature ranging from 20 to 140° C. ; and (c) condensing the unpolymerized fully saturated cashew nut shell liquid phosphorodithioic acid with at least one amine to obtain the amino di(alkylcyclohexyl) phosphorodithioate.Type: GrantFiled: March 30, 2001Date of Patent: October 28, 2003Assignee: Indian Oil Corporation LimitedInventors: Krishan Kumar Swami, Shanti Parkash, Rakesh Sarin, Deepak Kumar Tuli, Akhilesh Kumar Bhatnagar
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Patent number: 6548459Abstract: A process for the preparation of CNSL phenoxy carboxylic acid derivatives for use as an additive in a lubricant composition so as to impart improved rust inhibiting properties, including the steps of (a) partially hydrogenating distilled technical cashew nut shell liquid with palladium or nickel or platinum catalyst; to hydrogenate the olefinic chain; (b) reacting cashew nut shell liquid or partially hydrogenated technical cashew nut shell liquid with halogeno carboxylic acid derivatives to obtain unpolymerized cashew nut shell liquid phenoxy carboxylic acid derivatives, the reaction being carried out at a temperature ranging from 20 to 140° C. A lubricant containing a major proportion of a material selected from the group consisting of an oil of lubricating viscosity and a grease; and remainder an additive including CNSL phenoxy carboxylic acid derivative prepared by the foregoing process.Type: GrantFiled: April 2, 2002Date of Patent: April 15, 2003Assignee: Indian Oil Corporation LimitedInventors: Pankaj Kumar Mondal, Khem Chand Dohhen, Rakesh Sarin, Deepak Kumar Tuli, Niranjan Raghunath Raje, Akhilesh Kumar Bhatnagar
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Publication number: 20030050198Abstract: A process for the preparation of CNSL phenoxy carboxylic acid derivatives for use as an additive in a lubricant composition so as to impart improved rust inhibiting properties, including the steps of (a) partially hydrogenating distilled technical cashew nut shell liquid with palladium or nickel or platinum catalyst; to hydrogenate the olefinic chain; (b) reacting cashew nut shell liquid or partially hydrogenated technical cashew nut shell liquid with halogeno carboxylic acid derivatives to obtain unpolymerized cashew nut shell liquid phenoxy carboxylic acid derivatives, the reaction being carried out at a temperature ranging from 20 to 140° C. A lubricant containing a major proportion of a material selected from the group consisting of an oil of lubricating viscosity and a grease; and remainder an additive including CNSL phenoxy carboxylic acid derivative prepared by the foregoing process.Type: ApplicationFiled: April 2, 2002Publication date: March 13, 2003Applicant: Indian Oil Corporation LimitedInventors: Pankaj Kumar Mondal, Khem Chand Dohhen, Rakesh Sarin, Deepak Kumar Tuli, Niranjan Raghunath Raje, Akhilesh Kumar Bhatnagar
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Publication number: 20020128159Abstract: A process for the preparation of multi-functional additive, amino di(alkylcyclohexyl0) phosphorodithioate, for use as an additive in a lubricant composition so as to impart improved coefficient of friction, wear reduction, antioxidant and extreme pressure properties, including the steps of (a) hydrogenating distilled technical cashew nut shell liquid with palladium or nickel or platinum catalyst; to fully hydrogenate the olefinic chain and aromatic ring of the precursor; (b) reacting fully hydrogenated technical cashew nut shell liquid with phosphorus pentasulfide to obtain unpolymerized hydrogenated cashew nut shell liquid phosphorodithioic acid, the reaction being carried out at a temperature ranging from 20 to 140° C. ; and (c) condensing the unpolymerized fully saturated cashew nut shell liquid phosphorodithioic acid with at least one amine to obtain the amino di(alkylcyclohexyl) phosphorodithioate.Type: ApplicationFiled: March 30, 2001Publication date: September 12, 2002Inventors: Krishan Kumar Swami, Shanti Parkash, Rakesh Sarin, Deepak Kumar Tuli, Akhilesh Kumar Bhatnagar
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Patent number: 6362137Abstract: This invention relates to a cost effective process for preparing a corrosion inhibitor/metal passivator additive for lubricant, grease and fuel applications from waste refinery streams, comprising reacting 2,5-dimercapto-1,3,4-thiadiazole either in powder form or in solution form in polar organic solvent, with disulphide oil obtained from Merox extraction/caustic wash of the refinery streams, in the presence or absence of redox agent.Type: GrantFiled: August 17, 2000Date of Patent: March 26, 2002Assignee: Indian Oil CorporationInventors: Akhilesh Bhatnagar, Deepak Kumar Tuli, Rakesh Sarin, Ajay Arora, Pankaj Kumar Mandal
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Patent number: 6339052Abstract: A lubricating oil composition for gasoline and diesel internal combustion engines includes a major portion of an oil of lubricating viscosity; from 0.1 to 20.0% w/w of a component A which is a sulfurized, overbased calcium phenate detergent derived from distilled, hydrogenated cashew nut shell liquid; and from 0.1 to 10.Type: GrantFiled: June 30, 2000Date of Patent: January 15, 2002Assignee: Indian Oil Corporation LimitedInventors: Khem Chand Dohhen, Krishan Kumar Swami, Pankaj Kumar Mondal, Shanti Parkash, Rakesh Sarin, Deepak Kumar Tuli, Akhilesh Kumar Bhatnagar
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Patent number: 6184429Abstract: This invention relates to a catalyst composition capable of effecting selective oligomerisation of olefins contained in cracked refinery distillate streams, comprising of olefins, aromatics, paraffins and cycloparaffins. The catalyst composition gives very high conversion of olefins to poly olefins, which after distillation and stabilization by hydrogenation affords lubricating oil base stocks. The catalyst composition comprises of an aluminum halide and a transition metal alkoxide belonging to group IVB.Type: GrantFiled: July 16, 1999Date of Patent: February 6, 2001Assignee: The Indian Oil Corporation Ltd.Inventors: Rakesh Sarin, Sabyasachi Sinha Ray, Deepak Kumar Tuli, Madan Mohan Rai, Sobhan Ghosh, Akhilesh Kumar Bhatnagar