Patents by Inventor William B. Harrod
William B. Harrod 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: 9475697Abstract: Processes of and systems for removing free bromine from gaseous anhydrous HBr contaminated with free bromine are described. In one type of process the gaseous contaminated HBr is fed into countercurrent contact with at least one liquid alkylaromatic hydrocarbon within a packed section of a column while maintaining the packed section under free radical bromination conditions so that one or more than one liquid a-bromoalkylaromatic compound is produced along with one mole of gaseous HBr per mole of a-bromoalkylaromatic compound produced. In another type of process the gaseous anhydrous HBr is fed into countercurrent contact through at least two scrubbers so that the gaseous anhydrous HBr is scrubbed substantially free of bromine by passage through these at least two scrubbers, each of which contains a different specified type of scrubbing liquid. In one embodiment the liquid alkylaromatic hydrocarbon comprises 1,2-diphenylethane.Type: GrantFiled: May 24, 2013Date of Patent: October 25, 2016Assignee: Albemarle CorporationInventors: William B. Harrod, John M. Harden, Rhett P. Heeb, Steven G. Karseboom, Gary L. Sharp, Robert E. Williams
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Publication number: 20150147265Abstract: Processes of and systems for removing free bromine from gaseous anhydrous HBr contaminated with free bromine are described. In one type of process the gaseous contaminated HBr is fed into countercurrent contact with at least one liquid alkylaromatic hydrocarbon within a packed section of a column while maintaining the packed section under free radical bromination conditions so that one or more than one liquid a-bromoalkylaromatic compound is produced along with one mole of gaseous HBr per mole of a-bromoalkylaromatic compound produced. In another type of process the gaseous anhydrous HBr is fed into countercurrent contact through at least two scrubbers so that the gaseous anhydrous HBr is scrubbed substantially free of bromine by passage through these at least two scrubbers, each of which contains a different specified type of scrubbing liquid. In one embodiment the liquid alkylaromatic hydrocarbon comprises 1,2-diphenylethane.Type: ApplicationFiled: May 24, 2013Publication date: May 28, 2015Inventors: William B. Harrod, John M. Harden, Rhett P. Heeb, Steven G. Karseboom, Gary L. Sharp, Robert E. Williams
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Publication number: 20130287675Abstract: A new, highly selective way of removing bromine contamination from a gaseous stream comprised of hydrogen bromide and bromine is described. Such process technology involves non-catalyzed free radical (benzylic) bromination of an alkylene-bridged aromatic hydrocarbon and/or certain alkyl-substituted aromatic hydrocarbons and recovering the purified gaseous HBr. Because of the high selectivity of the bromination on the aliphatic bridges or side-chains, virtually no ring bromination occurs, and this enables recovery of the bromine values in the form of HBr. Thus preferably, the bromine is recovered as HBr from the scrubbing liquid by subjecting the scrubbing liquid to thermal or catalytic dehyrobromination. In plant operations, the gaseous HBr purified in the process can then be introduced into a compressor to produce either liquid or gaseous HBr for storage under pressure. Alternatively, the purified gaseous HBr can be fed directly into one or more reactions in which HBr is used as a reactant.Type: ApplicationFiled: December 28, 2011Publication date: October 31, 2013Applicant: Albemarle CorporationInventors: William B. Harrod, John M. Harden, Gary L. Sharp, Robert E. Williams
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Patent number: 8492598Abstract: Methods are provided for removing impurities from compositions comprising alkyl bromide. Such methods comprise combining such composition with at least one nonvolatile epoxide during distillation to purify the alkyl bromide. Ultra pure alkyl bromide compositions are also provided.Type: GrantFiled: August 28, 2008Date of Patent: July 23, 2013Assignee: Albemarle CorporationInventors: William B. Harrod, Dru J. Manuel, Keith G. Anderson, Aaron C. Williams, Kimberly A. Maxwell
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Patent number: 8193398Abstract: A process for oxygen-initiated hydrobromination of propene to form a crude reaction mixture of 95 GC area % n-propyl bromide. The process includes feeding an oxygen-containing gas, propene and hydrogen bromide into a liquid phase mixture comprised of n-propyl bromide and hydrogen bromide. At least the oxygen-containing gas and the propene of the feed are fed subsurface to the liquid phase mixture and either (a) the oxygen-containing gas and the propene do not come together in the absence of hydrogen bromide or (b) the oxygen-containing gas and the propene come together only in a propene:oxygen molar ratio in the range of 145:1 to 180:1. Purification processes provide a propyl bromide product containing at least 99.7 GC area % n-propyl bromide. Also provided is a novel composition of enhanced thermal stability which comprises a mixture of n-propyl bromide and isopropyl bromide. The mixture has an n-propyl bromide content of at least 99.7 GC area %, and an isopropyl bromide content of no more than 0.Type: GrantFiled: April 13, 2006Date of Patent: June 5, 2012Assignee: Albemarle CorporationInventors: William B. Harrod, Bonnie G. McKinnie, Alireza M. Dadgar, Tyson J. Hall
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Publication number: 20110112342Abstract: Methods are provided for removing impurities from compositions comprising alkyl bromide. Such methods comprise combining such composition with at least one nonvolatile epoxide during distillation to purify the alkyl bromide. Ultra pure alkyl bromide compositions are also provided.Type: ApplicationFiled: August 28, 2008Publication date: May 12, 2011Applicant: Albemarle CorporationInventors: William B. Harrod, Dru J. Manuel, Keith G. Anderson, Aaron C. Williams, Kimberly A. Maxwell
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Patent number: 7713510Abstract: Methods are provided for producing bromine wherein an aqueous solution is formed from at least a bromide source, an oxidant, and a catalyst comprising a Group 1 cation and an oxide of a transition metal.Type: GrantFiled: August 21, 2007Date of Patent: May 11, 2010Assignee: Albemarle CorporationInventors: William B. Harrod, Danielle Kristen Garrett
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Publication number: 20080318829Abstract: A process for oxygen-initiated hydrobromination of propene to form a crude reaction mixture of 95 GC area % n-propyl bromide. The process includes feeding an oxygen-containing gas, propene and hydrogen bromide into a liquid phase mixture comprised of n-propyl bromide and hydrogen bromide. At least the oxygen-containing gas and the propene of the feed are fed subsurface to the liquid phase mixture and either (a) the oxygen-containing gas and the propene do not come together in the absence of hydrogen bromide or (b) the oxygen-containing gas and the propene come together only in a propene:oxygen molar ratio in the range of 145:1 to 180:1. Purification processes provide a propyl bromide product containing at least 99.7 GC area % n-propyl bromide. Also provided is a novel composition of enhanced thermal stability which comprises a mixture of n-propyl bromide and isopropyl bromide. The mixture has an n-propyl bromide content of at least 99.7 GC area %, and an isopropyl bromide content of no more than 0.Type: ApplicationFiled: April 13, 2006Publication date: December 25, 2008Applicant: ALBEMARLE CORPORATIONInventors: William B. Harrod, Bonnie G. McKinnie, Alireza M. Dadgar, Tyson J. Hall
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Publication number: 20080085235Abstract: Methods are provided for producing bromine wherein an aqueous solution is formed from at least a bromide source, an oxidant, and a catalyst comprising a Group 1 cation and an oxide of a transition metalType: ApplicationFiled: August 21, 2007Publication date: April 10, 2008Applicant: ALBEMARLE CORPORATIONInventors: William B. Harrod, Danielle Kristen Garrett
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Patent number: 6399685Abstract: Emulsion formation is minimized or prevented and hydrolytic product degradation is suppressed during purification of impure bisphenol-A bis(diphenylphosphate). This is accomplished by forming a hydrocarbon solution of bisphenol-A bis(diphenylphosphate) plus impurities in a solvent comprising at least one aromatic hydrocarbon and at least one paraffinic hydrocarbon. Optionally, but preferably, this solution is washed with water or an aqueous buffer solution. Next, the hydrocarbon solution is washed one or more times with an aqueous alkaline washing solution that has a specific gravity that differs from the specific gravity of the hydrocarbon solution by at least about 0.05 gram per cubic centimeter. After each washing the mixture settles into a purified organic phase and a separate aqueous phase, and these phases are separated from each other.Type: GrantFiled: December 11, 2000Date of Patent: June 4, 2002Assignee: Albemarle CorporationInventors: W. Dirk Klobucar, William B. Harrod, Billie B. Dadgar, Joseph D. McLean, Gary D. Heidebrecht, Hao V. Phan, Thomas R. Nicholas, Jeffrey L. Broeker
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Patent number: 6319432Abstract: Disclosed is a flame retardant comprising bisphenol A bis(diphenyl phosphate) and its dimer, the former having an HPLC determined 78 to 87 area % and an 85 to less than 90 normalized area %, the normalized area % being based on the total HPLC area % of the bisphenol A bis(diphenyl phosphate) and the dimer. The flame retardant also has a low isopropenylphenyl diphenyl phosphate and a low triphenylphosphate content.Type: GrantFiled: June 11, 1999Date of Patent: November 20, 2001Assignee: Albemarle CorporationInventors: William B. Harrod, W. Dirk Klobucar
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Patent number: 6018067Abstract: Crude dihydrocarbylchlorothiophosphate product contaminated with dihydrocarbylpolysulfide and/or dihydrocarbylchlorophosphate is upgraded by treating the crude product with an aqueous hypochlorite solution, and separating an aqueous phase from the organic, then drying to obtain the resultant product.Type: GrantFiled: February 12, 1999Date of Patent: January 25, 2000Assignee: Albemarle CorporationInventors: William B. Harrod, David Edward Raposa, Dean Allen Raucstadt, Donald S. Vash
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Patent number: 5955626Abstract: Crude dihydrocarbylchlorothiophosphate product contaminated with dihydrocarbylpolysulfide and/or dihydrocarbylchlorophosphate is upgraded by treating the crude product with chlorine followed by an aqueous solution of reducing agent, separating an aqueous phase from the organic, then drying to obtain the resultant product.Type: GrantFiled: February 12, 1999Date of Patent: September 21, 1999Assignee: Albemarle CorporationInventors: William B. Harrod, Thomas J. Callender, David Edward Raposa
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Patent number: 5773672Abstract: 1-Bromopropane is produced from hydrogen bromide, propene and a catalytically effective amount of an ozonide catalyst and/or one or more active catalytic species formed in situ therefrom. In addition to being highly efficient and highly suitable for use on an industrial scale, the process has the additional advantages of being environmentally friendly, operationally safe, and conservationally beneficial.Type: GrantFiled: June 20, 1997Date of Patent: June 30, 1998Assignee: Albemarle CorporationInventors: William B. Harrod, Alireza M. Dadgar, Phillip R. Beaver