Patents by Inventor Hassan Y. Elnagar
Hassan Y. Elnagar 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: 9029562Abstract: This invention provides a process for the N-halogenation of at least one 5-hydrocarbyl hydantoin and/or at least one 5,5-dihydrocarbyl hydantoin. The process comprises concurrently feeding into a reaction zone (i) water, inorganic base, and 5,5-dimethylhydantoin, these being fed separately and/or in any combination(s), (ii) a separate feed of a brominating agent, and (iii) a separate feed of a chlorinating agent, in proportions such that during all or substantially all of the time the concurrent feeding is occurring halogenation of the 5-hydrocarbyl hydantoin and/or 5,5-dihydrocarbyl hydantoin occurs and resultant halogenated product precipitates in the liquid phase of an aqueous reaction mixture, and in which the pH of the liquid phase is continuously or substantially continuously maintained in the range of about 2.0 to about 8.0 during all or substantially all of the time the concurrent feeding is occurring.Type: GrantFiled: September 19, 2013Date of Patent: May 12, 2015Assignee: Albemarle CorporationInventor: Hassan Y. Elnagar
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Publication number: 20140017290Abstract: This invention provides a process for the N-halogenation of at least one 5-hydrocarbyl hydantoin and/or at least one 5,5-dihydrocarbyl hydantoin. The process comprises concurrently feeding into a reaction zone (i) water, inorganic base, and 5,5-dimethylhydantoin, these being fed separately and/or in any combination(s), (ii) a separate feed of a brominating agent, and (iii) a separate feed of a chlorinating agent, in proportions such that during all or substantially all of the time the concurrent feeding is occurring halogenation of the 5-hydrocarbyl hydantoin and/or 5,5-dihydrocarbyl hydantoin occurs and resultant halogenated product precipitates in the liquid phase of an aqueous reaction mixture, and in which the pH of the liquid phase is continuously or substantially continuously maintained in the range of about 2.0 to about 8.0 during all or substantially all of the time the concurrent feeding is occurring.Type: ApplicationFiled: September 19, 2013Publication date: January 16, 2014Applicant: ALBEMARLE CORPORATIONInventor: Hassan Y. Elnagar
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Patent number: 8586763Abstract: This invention provides a process for the N-halogenation of at least one 5-hydrocarbyl hydantoin and/or at least one 5,5-dihydrocarbyl hydantoin. The process comprises concurrently feeding into a reaction zone (i) water, inorganic base, and 5,5-dimethylhydantoin, these being fed separately and/or in any combination(s), (ii) a separate feed of a brominating agent, and (iii) a separate feed of a chlorinating agent, in proportions such that during all or substantially all of the time the concurrent feeding is occurring halogenation of the 5-hydrocarbyl hydantoin and/or 5,5-dihydrocarbyl hydantoin occurs and resultant halogenated product precipitates in the liquid phase of an aqueous reaction mixture, and in which the pH of the liquid phase is continuously or substantially continuously maintained in the range of about 2.0 to about 8.0 during all or substantially all of the time the concurrent feeding is occurring.Type: GrantFiled: July 6, 2011Date of Patent: November 19, 2013Assignee: Albemarle CorporationInventor: Hassan Y. Elnagar
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Macromolecular amine-phenolic antioxidant compositions, process technology thereof, and uses thereof
Patent number: 8455414Abstract: This invention relates to novel macromolecular amine-phenolic compositions having oxidation inhibition characteristics that are exhibited when added to organic material normally susceptible to oxidative degradation in the presence of air or oxygen, such as petroleum products, synthetic polymers, and elastomeric substances.Type: GrantFiled: October 17, 2007Date of Patent: June 4, 2013Assignee: Albemarle CorporationInventors: Mahmood Sabahi, Vincent J. Gatto, Hassan Y. Elnagar -
Patent number: 8410084Abstract: This invention relates to novel macromolecular compositions having oxidation inhibition characteristics that are exhibited when added to organic material normally susceptible to oxidative degradation in the presence of air or oxygen, such a petroleum products, synthetic polymers, and elastomeric substances.Type: GrantFiled: October 17, 2007Date of Patent: April 2, 2013Assignee: Albemarle CorporationInventors: Mahmood Sabahi, Vincent J. Gatto, Hassan Y. Elnagar
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MACROMOLECULAR AMINE-PHENOLIC ANTIOXIDANT COMPOSITIONS, PROCESS TECHNOLOGY THEREOF, AND USES THEREOF
Publication number: 20120115764Abstract: This invention relates to novel macromolecular amine-phenolic compositions having oxidation inhibition characteristics that are exhibited when added to organic material normally susceptible to oxidative degradation in the presence of air or oxygen, such as petroleum products, synthetic polymers, and elastomeric substances.Type: ApplicationFiled: October 17, 2007Publication date: May 10, 2012Applicant: Albemarle CorporationInventors: Mahmood Sabahi, Vincent J. Gatto, Hassan Y. Elnagar -
Publication number: 20110262510Abstract: This invention provides a process for the N-halogenation of at least one 5-hydrocarbyl hydantoin and/or at least one 5,5-dihydrocarbyl hydantoin. The process comprises concurrently feeding into a reaction zone (i) water, inorganic base, and 5,5-dimethylhydantoin, these being fed separately and/or in any combination(s), (ii) a separate feed of a brominating agent, and (iii) a separate feed of a chlorinating agent, in proportions such that during all or substantially all of the time the concurrent feeding is occurring halogenation of the 5-hydrocarbyl hydantoin and/or 5,5-dihydrocarbyl hydantoin occurs and resultant halogenated product precipitates in the liquid phase of an aqueous reaction mixture, and in which the pH of the liquid phase is continuously or substantially continuously maintained in the range of about 2.0 to about 8.0 during all or substantially all of the time the concurrent feeding is occurring.Type: ApplicationFiled: July 6, 2011Publication date: October 27, 2011Applicant: Albemarle CorporationInventor: Hassan Y. Elnagar
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Patent number: 7999118Abstract: This invention provides a process for the N-halogenation of at least one 5-hydrocarbyl hydantoin and/or at least one 5,5-dihydrocarbyl hydantoin. The process comprises concurrently feeding into a reaction zone (i) water, inorganic base, and 5,5-dimethylhydantoin, these being fed separately and/or in any combination(s), (ii) a separate feed of a brominating agent, and (iii) a separate feed of a chlorinating agent, in proportions such that during all or substantially all of the time the concurrent feeding is occurring halogenation of the 5-hydrocarbyl hydantoin and/or 5,5-dihydrocarbyl hydantoin occurs and resultant halogenated product precipitates in the liquid phase of an aqueous reaction mixture, and in which the pH of the liquid phase is continuously or substantially continuously maintained in the range of about 2.0 to about 8.0 during all or substantially all of the time the concurrent feeding is occurring.Type: GrantFiled: October 17, 2005Date of Patent: August 16, 2011Assignee: Albemarle CorporationInventors: Hassan Y. Elnagar, Bruce C. Peters, Edgar E. Spielman, Jr., Dustin H. Thomas
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Patent number: 7988884Abstract: A novel manufacturing process is described for producing hindered phenolic alkyl esters, which may be useful as antioxidants. This process simplifies catalyst neutralization and removal during the preparation of hindered phenolic esters. Compositions that comprise the hindered phenolic esters produced according to these methods are also described.Type: GrantFiled: January 26, 2010Date of Patent: August 2, 2011Assignee: Albemarle CorporationInventors: Vincent J. Gatto, Hassan Y Elnagar, Chi Hung Cheng, J. Robert Adams
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Publication number: 20110124538Abstract: Process technology is described for producing a reaction-derived product mixture containing a high yield of octylated phenyl-alpha-naphthylamine by catalytic alkylation of phenyl-alpha-naphthylamine with diisobutylene. New reaction-derived product mixtures are produced. Also provided are novel reaction-derived octylated phenyl-alpha-naphthylamine reaction product mixtures from which catalyst residues and excess olefin components have been removed. These reaction product mixtures are effective as antioxidants for various oxygen-sensitive substrate materials such as oils and lubricants. Also described are new octylated phenyl-alpha-naphthylamine product mixtures and their use in forming clear, stable, liquid antioxidant compositions for addition to a wide variety of substrates.Type: ApplicationFiled: July 21, 2009Publication date: May 26, 2011Applicant: ALBEMARLE CORPORATIONInventors: Steven G. Karseboom, Hassan Y. Elnagar, Vincent J. Gatto, William E. Moehle
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Publication number: 20100292321Abstract: Compositions and methods suitable for killing bacteria and controlling biofilms comprising one or more microorganisms are provided wherein molecules capable of emulating cell-to-cell signal molecules of the microorganisms are utilized.Type: ApplicationFiled: June 29, 2007Publication date: November 18, 2010Applicant: ALBEMARLE CORPORATIONInventors: Joe D. Sauer, Christopher J. Nalepa, William S. Pickrell, Richmond M. Starrett, Hassan Y. Elnagar, George W. Cook, Robert M. Moore, Jennifer Moore
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Publication number: 20100130391Abstract: A novel manufacturing process is described for producing hindered phenolic alkyl esters, which may be useful as antioxidants. This process simplifies catalyst neutralization and removal during the preparation of hindered phenolic esters. Compositions that comprise the hindered phenolic esters produced according to these methods are also described.Type: ApplicationFiled: January 26, 2010Publication date: May 27, 2010Applicant: ALBEMARLE CORPORATIONInventors: Vincent J. Gatto, Hassan Y. Elnagar, Chi Hung Cheng, J. Robert Adams
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Patent number: 7667066Abstract: A novel manufacturing process is described for producing hindered phenolic alkyl esters, which may be useful as antioxidants. This process simplifies catalyst neutralization and removal during the preparation of hindered phenolic esters. Compositions that comprise the hindered phenolic esters produced according to these methods are also described.Type: GrantFiled: February 27, 2004Date of Patent: February 23, 2010Assignee: Albemarle CorporationInventors: Vincent J. Gatto, Hassan Y. Elnagar, Chi Hung Cheng, J. Robert Adams
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Publication number: 20100041730Abstract: This invention relates to novel macromolecular compositions having oxidation inhibition characteristics that are exhibited when added to organic material normally susceptible to oxidative degradation in the presence of air or oxygen, such a petroleum products, synthetic polymers, and elastomeric substances.Type: ApplicationFiled: October 17, 2007Publication date: February 18, 2010Inventors: Mahmood Sabahi, Vincent J. Gatto, Hassan Y. Elnagar
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Publication number: 20080318814Abstract: A lubricant oil composition having a synergistic oxidative stability is disclosed, the composition comprising at least one hindered phenolic antioxidant, at least one mono-boronated hindered phenolic antioxidant, at least one di-boronated hindered phenolic antioxidant, and at least one alkylated diphenylamine. The invention also provides a lubricating oil additive concentrate composition that imparts synergistic oxidative stability to a lubricant oil upon its addition, the concentrate composition comprising at least one hindered phenolic antioxidant, at least one mono-boronated hindered phenolic antioxidant, at least one di-boronated hindered phenolic antioxidant, and at least one alkylated diphenylamine. Further, the concentrate compositions of the present invention may also be prepared with a high concentration of hindered phenolic antioxidants without deleterious effects on viscosity or lubricant solubility.Type: ApplicationFiled: January 12, 2007Publication date: December 25, 2008Applicant: Albemarle CorporationInventors: Vincent J. Gatto, Hassan Y. Elnagar, William E. Moehle
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Patent number: 6825390Abstract: Propargyl bromide is effectively stabilized against shock or thermal decomposition by use therewith of an environmentally acceptable inert liquid solvent that forms an azeotrope with propargyl bromide.Type: GrantFiled: April 18, 2002Date of Patent: November 30, 2004Assignee: Albemarle CorporationInventors: Robert C. Herndon, Jr., Robert H. Allen, Noel H. Brantley, Hassan Y. Elnagar, Ronny W. Lin, Ralph W. Magin, Mahmood Sabahi
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Patent number: 6809205Abstract: The process enables highly effective N-halogenation of a compound having one or more halogenatable amido or imido functional groups in the molecule. The process involves, for example, concurrently feeding into a reactor (i) water, inorganic base, and the compound to be N-halogenated, e.g., a hydantoin, and a feed of (ii) a brominating agent and/or a chlorinating agent. The proportions of these feeds are such that the pH is kept within the range of ca. 5.5-8.5 (preferably 6.5-8.5, and most preferably 6.8-7.2) and one or more of the amido or imido nitrogen atoms is substituted by a bromine or chlorine atom. A feature of the process is that it can be conducted at elevated temperatures as high as about 90° C. without appreciable thermal decomposition of reactants or product. The resultant product continuously precipitates in high yield and purity. Moreover, products can be produced that are very pale yellow to almost pure white in appearance.Type: GrantFiled: January 18, 2000Date of Patent: October 26, 2004Assignee: Albemarle CorporationInventors: Hassan Y. Elnagar, Bruce C. Peters, Edgar E. Spielman, Jr., Dustin H. Thomas
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Patent number: 6777375Abstract: Propargyl bromide is effectively stabilized against shock or thermal decomposition by use therewith of an environmentally acceptable inert liquid solvent that forms an azeotrope with propargyl bromide.Type: GrantFiled: April 8, 2002Date of Patent: August 17, 2004Assignee: Albemarle CorporationInventors: Ralph W. Magin, Robert C. Herndon, Jr., Mahmood Sabahi, Robert H. Allen, Noel H. Brantley, Hassan Y. Elnagar, Ronny W. Lin
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Publication number: 20040147617Abstract: Propargyl bromide is effectively stabilized against shock or thermal decomposition by use therewith of an environmentally acceptable inert liquid solvent that forms an azeotrope with propargyl bromide.Type: ApplicationFiled: January 12, 2004Publication date: July 29, 2004Inventors: Robert C. Herndon, Robert H. Allen, Noel H. Brantley, Hassan Y. Elnagar, Ronny W. Lin, Ralph W. Magin, Mahmood Sabahi
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Publication number: 20040044259Abstract: This invention provides a process of producing propargyl bromide in the absence of abase.Type: ApplicationFiled: August 30, 2002Publication date: March 4, 2004Inventors: Christopher L. Mero, Hassan Y. Elnagar, Robert C. Herndon