Reactant Consists Of Phosphorus And Sulfur (e.g., Phosphorus Pentasulfide, Etc.) Patents (Class 558/112)
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Patent number: 10414723Abstract: Process for converting a carboxamide to a thiocarboxamide includes reacting (a) a substrate that comprises a heteroatom-containing moiety and a carboxamide moiety with (b) a dialkyl dithiophosphate and/or a salt thereof. The heteroatom-containing moiety includes a heteroatom selected from the group consisting of N, O, and S. Processes for preparing piperidine-4-thiocarboxamide are described.Type: GrantFiled: May 6, 2016Date of Patent: September 17, 2019Assignee: VERTELLUS HOLDINGS LLCInventors: Martin P. Grendze, Ramiah Murugan
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Patent number: 9612059Abstract: Systems, methods, and computer-implemented embodiments consistent with the inventions herein are directed to storing and/or transferring heat. In one exemplary implementation, there is provided a system for transferring/storing heat comprised of a heat exchange/storage apparatus including a chamber, and a heat input device adapted to heat/provide a vapor into the chamber. Other exemplary implementations may include one or more features consistent with a heat output device through which a working medium/fluid passes, a thermal storage medium located within the chamber, and/or a heat exchange system that delivers a heat exchange medium/fluid to the thermal storage medium.Type: GrantFiled: September 17, 2010Date of Patent: April 4, 2017Assignee: Bluelagoon Technologies Ltd.Inventors: XiaoDong Xiang, Rong Zhang
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Patent number: 8138366Abstract: The present invention relates to the improved process for the preparation of highly pure form of S-[1,2-(dicarbethoxy)-ethyl]O,O-dimethyl phosphorodithioate having formula (I). The compound of formula (I) has adopted name “Malathion”. The present invention also relates to the novel process of preparing intermediate O,O-dimethyldithiophosphoric acid of formula (II), which is useful in the preparation of Malathion.Type: GrantFiled: April 28, 2008Date of Patent: March 20, 2012Assignee: Suven Life Sciences LimitedInventors: Veera Reddy Arava, Vaishali Nadkarni, Venkateswarlu Jasti
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Publication number: 20110319303Abstract: Alkylphosphorofluoridothioates containing alkyl groups of greater than four carbons which exhibit significantly lower wear volume compared to ZDDP, methods of making same with high yields, and methods of using same as lubricant additives.Type: ApplicationFiled: June 24, 2011Publication date: December 29, 2011Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEMInventors: Xin Chen, Pranesh B. Aswath, Ronald L. Elsenbaumer
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Publication number: 20100204501Abstract: The present invention relates to the improved process for the preparation of highly pure form of S-[1,2-(dicarbethoxy)-ethyl]O,O-dimethyl phosphorodithioate having formula (I). The compound of formula (I) has adopted name “Malathion”. The present invention also relates to the novel process of preparing intermediate O,O-dimethyldithiophosphoric acid of formula (II), which is useful in the preparation of Malathion. The Malathion prepared by the process of this invention is highly storage stable and toxic impurities are much lower than any other commercial preparation available for the pharmaceutical purpose.Type: ApplicationFiled: April 28, 2008Publication date: August 12, 2010Applicant: SUVEN LIFE SCIENCES LIMITEDInventors: Veera Reddy Arava, Vaishali Nadkarni, Venkateswarlu Jasti
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Patent number: 6764984Abstract: Fluorinated dialkyl dithiophosphoric acids according to formula (I) and metallic salts thereof: the compounds are useful, for example, as additives for lubricant compositions.Type: GrantFiled: December 4, 2002Date of Patent: July 20, 2004Assignee: E. I. du Pont de Nemours and CompanyInventor: Richard P. Beatty
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Patent number: 6761832Abstract: This invention relates to a process for the production of dithiophosphoric acid poly-sulfide mixtures, which is characterized in that dithiophosphoric acid disulfides are reacted with sulfur at elevated temperatures. The dithiophosphoric acid polysulfide mixtures produced using the process according to the present invention are used as sulfur donors for the vulcanization of natural and synthetic rubbers and in the latex vulcanization of natural and synthetic rubber latex.Type: GrantFiled: February 10, 2000Date of Patent: July 13, 2004Assignee: Rhein Chemie Rheinau GmbHInventors: Ludger Heiliger, Alfred Pauli, Joachim Hegmann, Clemens Schudok, Thomas Früh
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Publication number: 20030139300Abstract: Fluorinated dialkyl dithiophosphoric acids according to formula (I) and metallic salts thereof: 1Type: ApplicationFiled: December 4, 2002Publication date: July 24, 2003Inventor: Richard P. Beatty
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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: 5916850Abstract: A process for the preparation of amino di(alkylaryl) 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) reacting a starting material selected from the group consisting of distilled cashew nut shell liquid and distilled hydrogenated cashew nut shell liquid with phosphorus pentasulfide to obtain unpolymerized cashew nut shell liquid phosphorodithioic acid, the reacting being carried out at a temperature ranging from 40 to 80.degree. C. when the starting material is distilled cashew nut shell liquid and at a temperature ranging up to 140.degree. C. and above when the starting material is distilled hydrogenated cashew nut shell liquid; and(b) condensing the unpolymerized cashew nut shell liquid phosphorodithioic acid with at least one amine to obtain the amino di(alkylaryl) phosphorodithioate.Type: GrantFiled: November 6, 1997Date of Patent: June 29, 1999Assignee: Indian Oil Corporaton LimitedInventors: Deepak Kumar Tuli, Rakesh Sarin, Madan Mohan Rai, Akhilesh Kumar Bhatnagar
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Patent number: 5703262Abstract: Dithiophosphoric acids are advantageously produced by reaction of an alcohol or phenol with phosphorus sesquisulphide in the presence of sulphur, preferably at the reflux temperature of the alcohol used.Type: GrantFiled: April 6, 1993Date of Patent: December 30, 1997Assignee: Exxon Chemical Patents IncInventors: Terence Colclough, Philip Skinner, John Derek Woollins, Paul Thomas Wood
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Patent number: 5001249Abstract: The formation of dialkyl phosphorodithioic acids by reacting phosphorus pentasulfide with an alcohol is catalyzed by using an organosulfur halide catalyst for the reaction. Representative classes of organosulfur halide catalysts include the sulfonium halides, the sulfoxonium halides, and polymeric sulfur halide materials.Type: GrantFiled: March 16, 1988Date of Patent: March 19, 1991Assignee: ICI Americas Inc.Inventor: Stanley B. Mirviss
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Patent number: 4832807Abstract: Phosphorylation of alcohols by contacting the alcohol with a phosphorous sulphide under the impact of ultrasound. The phosporylated produce can be converted into a metal salt, which is a suitable anti-wear additive for lubricating oils.Type: GrantFiled: July 31, 1987Date of Patent: May 23, 1989Assignee: Shell Oil CompanyInventors: Feike De Jong, Jacob Vermeule
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Patent number: 4806210Abstract: A process for the recovery of alcohols and hydrogen sulfide from a thiophosphate containing mixture is disclosed.Type: GrantFiled: September 11, 1987Date of Patent: February 21, 1989Assignee: The Lubrizol CorporationInventor: Frank M. Van Lier
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Patent number: 4681964Abstract: The alcoholysis and phenolysis of phosphorus pentasulfide is accelerated by reacting the phosphorus pentasulfide with an alcohol or phenol in the presence of a catalytic amount of a catalyst consisting essentially of water, phosphoric acid, a phosphate salt, sulfuric acid or mixtures thereof. The dialkyl- or diaryldithiophosphoric acids produced are useful in the production of such products as motor oil additives, insecticides, etc.Type: GrantFiled: February 11, 1985Date of Patent: July 21, 1987Assignee: FMC CorporationInventors: Dennis C. Annarelli, Frank J. Dominiani, Jr.