Patents by Inventor Christian D. Kneupper
Christian D. Kneupper 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: 8926916Abstract: A process and apparatus for recovering dichlorohydrins from a mixture comprising dichlorohydrins, one or more compounds selected from esters of dichlorohydrins, monochlorohydrins and/or esters thereof, and multihydroxylated-aliphatic hydrocarbon compounds and/or esters thereof, and optionally one or more substances comprising water, chlorinating agents, catalysts and/or esters of catalysts is disclosed. The mixture is stripped to recover dichlorohydrin(s) while distilling or fractionating the mixture to separate a lower boiling fraction comprising dichlorohydrin(s) from the mixture in one step. Advantages include more efficient recovery of dichlorohydrins for a given distillation column, less waste due to avoiding the conditions conducive to the formation of heavy byproducts, and reduced capital investment in recovery equipment.Type: GrantFiled: March 15, 2013Date of Patent: January 6, 2015Assignee: Dow Global Technologies LLCInventors: Danil Tirtowidjojo, Andrei S. Merenov, Christian D. Kneupper, Bruce D. Hook, Anil Mehta
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Patent number: 8664453Abstract: A process and apparatus for recovering dichlorohydrins from a mixture comprising dichlorohydrins, one or more compounds selected from esters of dichlorohydrins, monochlorohydrins and/or esters thereof, and multihydroxylated-aliphatic hydrocarbon compounds and/or esters thereof, and optionally one or more substances comprising water, chlorinating agents, catalysts and/or esters of catalysts is disclosed. The mixture is distilled or fractionated to separate a lower boiling fraction comprising dichlorohydrin(s) from the mixture to form a higher boiling fraction comprising the residue of the distillation or fractionation. The higher boiling fraction is stripped to recover remaining dichlorohydrins. Advantages include more efficient recovery of dichlorohydrins for a given distillation column, less waste due to avoiding the conditions conducive to the formation of heavy byproducts, and reduced capital investment in recovery equipment.Type: GrantFiled: April 11, 2008Date of Patent: March 4, 2014Assignee: Dow Global Technologies Inc.Inventors: Danil Tirtowidjojo, Andrei S. Merenov, Christian D. Kneupper, Bruce D. Hook, Anil I. Mehta
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Patent number: 8629305Abstract: A process and apparatus for recovering dichlorohydrins from a mixture comprising dichlorohydrins, water, one or more compounds selected from esters of dichlorohydrins, monochlorohydrins and/or esters thereof, and multihydroxylated-aliphatic hydrocarbon compounds and/or esters thereof, and optionally one or more substances comprising chlorinating agents, catalysts and/or esters of catalysts is disclosed. A liquid aqueous phase is recycled to the distillation column while distilling or fractionating the mixture to separate dichlorohydrin(s) and water from the mixture. Advantages include more efficient recovery of dichlorohydrins for a given distillation column, less waste due to avoiding the conditions conducive to the formation of heavy byproducts, and reduced capital investment in recovery equipment.Type: GrantFiled: April 11, 2008Date of Patent: January 14, 2014Assignee: Dow Global Technologies IncInventors: Danil Tirtowidjojo, Andrei S. Merenov, Christian D. Kneupper, Bruce D. Hook, Anil J. Mehta
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Patent number: 8420870Abstract: A process and apparatus for recovering dichlorohydrins from a mixture comprising dichlorohydrins, one or more compounds selected from esters of dichlorohydrins, monochlorohydrins and/or esters thereof, and multihydroxylated-aliphatic hydrocarbon compounds and/or esters thereof, and optionally one or more substances comprising water, chlorinating agents, catalysts and/or esters of catalysts is disclosed. The mixture is stripped to recover dichlorohydrin(s) while distilling or fractionating the mixture to separate a lower boiling fraction comprising dichlorohydrin(s) from the mixture in one step. Advantages include more efficient recovery of dichlorohydrins for a given distillation column, less waste due to avoiding the conditions conducive to the formation of heavy byproducts, and reduced capital investment in recovery equipment.Type: GrantFiled: April 11, 2008Date of Patent: April 16, 2013Assignee: Dow Global Technologies LLCInventors: Danil Tirtowidjojo, Andrei S. Merenov, Christian D. Kneupper, Bruce D. Hook, Anil J. Mehta
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Patent number: 8338627Abstract: A process for producing epoxide, the process including contacting an organic phase including at least one halohydrin(s) with at least one aqueous phase including a base in a plug-flow mixer/reactor system to disperse the organic phase in the aqueous phase via a mixing device imparting a power-to-mass ratio of at least 0.2 W/kg to convert at least a portion of the at least one halohydrin to an epoxide.Type: GrantFiled: July 30, 2009Date of Patent: December 25, 2012Assignee: Dow Global Technologies LLCInventors: William W. Fan, Christian D. Kneupper, Sascha Noormann, Ranate Patrascu, Bruce D. Hook, Charles W. Lipp, Michael D. Cloeter, Heinz Groenewald
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Patent number: 8298500Abstract: A process and apparatus are disclosed for the purification of epichlorohydrin. The process includes distilling and/or fractionating a feed stream containing epichlorohydrin, dichlorohydrin(s), and one or more other substances, subjecting at least a portion of the liquid phase effluent to a dichlorohydrin dehydrochlorination process for converting residual dichlorohydrin(s) in the liquid phase effluent to epichlorohydrin, and recovering purified epichlorohydrin from the vapor phase effluent in which the distillation/fractionation pressure and/or temperature of step (1) is adjusted to retain at least 5 weight-percent epichlorohydrin in the liquid phase effluent. The apparatus for making purified epichlorohydrin includes a dehydrochlorination apparatus, a first liquid-vapor contacting apparatus, and a second liquid-vapor contacting apparatus connected to the dehydrochlorination apparatus for recycling a distillate to the dehydrochlorination apparatus.Type: GrantFiled: January 22, 2009Date of Patent: October 30, 2012Assignee: Dow Global Technologies LLCInventors: Christian D. Kneupper, Perry S. Basile, William W. Fan, Sascha Noormann
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Patent number: 7985867Abstract: A process for producing epoxides, the process including: (a) feeding at least one aqueous alkali and at least one halohydrin to a reactive distillation column, wherein the reactive distillation column includes a feed zone, a top zone disposed above the feed zone, and a bottom zone disposed below the feed zone; (b) concurrently in the reactive distillation column: (i) reacting at least a portion of the halohydrin with the alkali to form an epoxide; and (ii) stripping water and the epoxide from a basic aqueous residue; (c) recovering the water and the epoxide from the reactive distillation column as an overheads fraction; (d) condensing and phase separating the overheads fraction to form an organic overheads fraction including the epoxide and an aqueous overheads fraction including water; and (e) maintaining a liquid holdup per plate in the feed zone at a residence time of 10 seconds or less.Type: GrantFiled: July 23, 2009Date of Patent: July 26, 2011Assignee: Dow Global Technologies LLCInventors: William W. Fan, Christian D. Kneupper, Sascha Noormann, Renate Patrascu
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Patent number: 7982061Abstract: A process for producing epoxides, the process including: (a) feeding at least one aqueous alkali and at least one halohydrin to a reactive distillation column; (b) concurrently in the reactive distillation column: (i) reacting at least a portion of the halohydrin with the alkali to form an epoxide; and (ii) stripping water and the epoxide from a basic aqueous residue; (c) recovering the water and the epoxide from the reactive distillation column as an overheads fraction; and, (d) condensing and phase separating the overheads fraction at a temperature of 50° C. or less to form an organic overheads fraction including the epoxide and an aqueous overheads fraction including water.Type: GrantFiled: July 23, 2009Date of Patent: July 19, 2011Inventors: William W. Fan, Christian D. Kneupper, Sascha Noormann, Renate Patrascu
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Publication number: 20100331555Abstract: A process and apparatus are disclosed for the purification of epichlorohydrin. The process includes distilling and/or fractionating a feed stream containing epichlorohydrin, dichlorohydrin(s), and one or more other substances, subjecting at least a portion of the liquid phase effluent to a dichlorohydrin dehydrochlorination process for converting residual dichlorohydrin(s) in the liquid phase effluent to epichlorohydrin, and recovering purified epichlorohydrin from the vapor phase effluent in which the distillation/fractionation pressure and/or temperature of step (1) is adjusted to retain at least 5 weight-percent epichlorohydrin in the liquid phase effluent. The apparatus for making purified epichlorohydrin includes a dehydrochlorination apparatus, a first liquid-vapor contacting apparatus, and a second liquid-vapor contacting apparatus connected to the dehydrochlorination apparatus for recycling a distillate to the dehydrochlorination apparatus.Type: ApplicationFiled: January 22, 2009Publication date: December 30, 2010Inventors: Christian D. Kneupper, Perry S. Basile, William W. Fan, Sascha Noormann
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Publication number: 20100137652Abstract: A process and apparatus for recovering dichlorohydrins from a mixture comprising dichlorohydrins, one or more compounds selected from esters of dichlorohydrins, monochlorohydrins and/or esters thereof, and multihydroxylated-aliphatic hydrocarbon compounds and/or esters thereof, and optionally one or more substances comprising water, chlorinating agents, catalysts and/or esters of catalysts is disclosed. The mixture is distilled or fractionated to separate a lower boiling fraction comprising dichlorohydrin(s) from the mixture to form a higher boiling fraction comprising the residue of the distillation or fractionation. The higher boiling fraction is stripped to recover remaining dichlorohydrins. Advantages include more efficient recovery of dichlorohydrins for a given distillation column, less waste due to avoiding the conditions conducive to the formation of heavy byproducts, and reduced capital investment in recovery equipment.Type: ApplicationFiled: April 11, 2008Publication date: June 3, 2010Inventors: Danil Tirtowidjojo, Andrei S. Merenov, Christian D. Kneupper, Bruce D. Hook, Anil I. Mehta
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Publication number: 20100137653Abstract: A process and apparatus for recovering dichlorohydrins from a mixture comprising dichlorohydrins, one or more compounds selected from esters of dichlorohydrins, monochlorohydrins and/or esters thereof, and multihydroxylated-aliphatic hydrocarbon compounds and/or esters thereof, and optionally one or more substances comprising water, chlorinating agents, catalysts and/or esters of catalysts is disclosed. The mixture is stripped to recover dichlorohydrin(s) while distilling or fractionating the mixture to separate a lower boiling fraction comprising dichlorohydrin(s) from the mixture in one step. Advantages include more efficient recovery of dichlorohydrins for a given distillation column, less waste due to avoiding the conditions conducive to the formation of heavy byproducts, and reduced capital investment in recovery equipment.Type: ApplicationFiled: April 11, 2008Publication date: June 3, 2010Inventors: Danil Tirtowidjojo, Andrei S. Merenov, Christian D. Kneupper, Bruce D. Hook, Anil J. Mehta
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Publication number: 20100105965Abstract: A process and apparatus for recovering dichlorohydrins from a mixture comprising dichlorohydrins, water, one or more compounds selected from esters of dichlorohydrins, monochlorohydrins and/or esters thereof, and multihydroxylated-aliphatic hydrocarbon compounds and/or esters thereof, and optionally one or more substances comprising chlorinating agents, catalysts and/or esters of catalysts is disclosed. A liquid aqueous phase is recycled to the distillation column while distilling or fractionating the mixture to separate dichlorohydrin(s) and water from the mixture. Advantages include more efficient recovery of dichlorohydrins for a given distillation column, less waste due to avoiding the conditions conducive to the formation of heavy byproducts, and reduced capital investment in recovery equipment.Type: ApplicationFiled: April 11, 2008Publication date: April 29, 2010Inventors: Danil Tirtowidjojo, Andrei S. Merenov, Christian D. Kneupper, Bruce D. Hook, Anil J. Mehta
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Publication number: 20100029959Abstract: A process for producing epoxides, the process including: (a) feeding at least one aqueous alkali and at least one halohydrin to a reactive distillation column, wherein the reactive distillation column includes a feed zone, a top zone disposed above the feed zone, and a bottom zone disposed below the feed zone; (b) concurrently in the reactive distillation column: (i) reacting at least a portion of the halohydrin with the alkali to form an epoxide; and (ii) stripping water and the epoxide from a basic aqueous residue; (c) recovering the water and the epoxide from the reactive distillation column as an overheads fraction; (d) condensing and phase separating the overheads fraction to form an organic overheads fraction including the epoxide and an aqueous overheads fraction including water; and (e) maintaining a liquid holdup per plate in the feed zone at a residence time of 10 seconds or less.Type: ApplicationFiled: July 23, 2009Publication date: February 4, 2010Applicant: DOW GLOBAL TECHNOLOGIES INC.Inventors: William W. Fan, Christian D. Kneupper, Sascha Noormann, Renate Patrascu
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Publication number: 20100029960Abstract: A process for producing epoxide, the process including contacting an organic phase including at least one halohydrin(s) with at least one aqueous phase including a base in a plug-flow mixer/reactor system to disperse the organic phase in the aqueous phase via a mixing device imparting a power-to-mass ratio of at least 0.2 W/kg to convert at least a portion of the at least one halohydrin to an epoxide.Type: ApplicationFiled: July 30, 2009Publication date: February 4, 2010Applicant: THE DOW CHEMICAL COMPANYInventors: William W. Fan, Christian D. Kneupper, Sascha N. Noormann, Renate P. Patrascu, Bruce D. Hook, Charles W. Lipp, Michael D. Cloeter, Heinz G. Groenewald
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Publication number: 20100029958Abstract: A process for producing epoxides, the process including: (a) feeding at least one aqueous alkali and at least one halohydrin to a reactive distillation column; (b) concurrently in the reactive distillation column: (i) reacting at least a portion of the halohydrin with the alkali to form an epoxide; and (ii) stripping water and the epoxide from a basic aqueous residue; (c) recovering the water and the epoxide from the reactive distillation column as an overheads fraction; and, (d) condensing and phase separating the overheads fraction at a temperature of 50° C. or less to form an organic overheads fraction including the epoxide and an aqueous overheads fraction including water.Type: ApplicationFiled: July 23, 2009Publication date: February 4, 2010Applicant: DOW GLOBAL TECHNOLOGIES INC.Inventors: William W. Fan, Christian D. Kneupper, Sascha Noormann, Renate Patrascu
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Patent number: 5077435Abstract: The present invention is a process for producing halohydroxypropyltrialkylammonium halides by reacting a trialkylamine salt with an epihalohydrin, the improvement comprising using 1,3-dihalo-2-propanol as a cosolvent. Using that cosolvent reduces the amount of diquaternary, dichloropropanol, and epoxy by-products formed. The cosolvent is preferably separated from the reaction mixture and recycled for use with additional trialkylamine salt and epihalohydrin. The process is particularly useful in preparing chlorohydroxypropyltrimethylammonium chloride.Type: GrantFiled: September 12, 1990Date of Patent: December 31, 1991Assignee: The Dow Chemical CompanyInventors: Russell B. Kimbrell, Christian D. Kneupper, Ruben L. Krause