51
Stephen William Colley, Norman Harris, Colin Rathmell: Process for purification of alkyl alkanoate. Davy Process Technology, Senniger Powers Leavitt & Roedel, October 14, 2003: US06632330 (117 worldwide citation)

A process for the recovery of substantially pure alkyl alkanoate, such as ethyl acetate, from an impure feedstock. The impure feedstock is contacted with a selective hydrogenation catalyst in the presence of hydrogen in a selective hydrogenation zone maintained under selective hydrogenation conditio ...


52
Lawrence A Smith Jr: Catalytic distillation process. Chemical Research & Licensing Company, Kenneth H Johnson, November 4, 1980: US04232177 (113 worldwide citation)

A method for conducting chemical reactions and fractionation of the reaction mixture comprising feeding reactants to a distillation column reactor into a feed zone and concurrently contracting the reactants with a fixed bed catalytic packing to concurrently carry out the reaction and fractionate the ...


53
Lawrence A Smith Jr: Catalytic distillation structure. Chemical Research & Licensing Company, Kenneth H Johnson, April 17, 1984: US04443559 (113 worldwide citation)

Catalytic distillation structure for use in reaction distillation columns, a providing reaction sites and distillation structure and consisting of a catalyst component and a resilient component intimately associated therewith. The resilient component has at least about 70 volume % open space and bei ...


54
John R Messick, William R Ackley, George D Moon Jr: Anhydrous ethanol distillation method and apparatus. Raphael Katzen Associates International, Merriam Marshall & Bicknell, December 27, 1983: US04422903 (112 worldwide citation)

An improved distillation method and apparatus are provided for recovering anhydrous ethanol from fermentation or synthetic feedstocks. The system includes at least one stripper-rectifier tower, a dehydrating tower, and an azeotropic agent stripping tower. Substantial energy savings are realized by o ...


55
Hans E Grethlein, Lee H Lynd: Distillation systems and methods. Trustees of Dartmouth College, Hamilton Brook Smith & Reynolds, December 2, 1986: US04626321 (109 worldwide citation)

A method of distillation employing a heat pump (which may be driven by a compressor) using a vapor stream from within the distillation system as a heat source and a liquid stream from within the distillation system as a heat sink. The selection of heat-source vapors and heat-sink liquid is such that ...


56
Arthur S Holmes, James M Ryan: Distillative separations of gas mixtures containing methane, carbon dioxide and other components. Koch Process Systems, Richard P Crowley, July 31, 1984: US04462814 (108 worldwide citation)

Distillative separations of hydrocarbon feed mixtures containing at least methane and carbon dioxide, as well as other components, such as ethane, higher hydrocarbons, and hydrogen sulfide are disclosed. In the separations described, methane is preferably separated from an acid gas under conditions ...


57
Jack E Bridges, Harsh Dev, Richard H Snow, Allen Taflove: In situ decontamination of spills and landfills by radio frequency heating. IIT Research Institute, Fitch Even Tabin & Flannery, June 2, 1987: US04670634 (105 worldwide citation)

A water-containing region at or near the surface of the earth, such as a landfill, that is contaminated with hazardous materials is decontaminated by heating the region with bound radio frequency energy from a bound-wave transmission line excitor array disposed outside the region to a temperature to ...


58
Lawrence A Smith Jr: Process for separating isobutene from C.sub.4 streams. Chemical Research & Licensing Company, Kenneth H Johnson, December 30, 1980: US04242530 (105 worldwide citation)

A method for the separation of isobutene from a mixture comprising n-butene and isobutene comprising feeding a C.sub.4 stream containing n-butene and isobutene to a distillation column reactor into a feed zone contacting the stream with fixed bed acidic cation exchange resin to form diisobutene whic ...


59
John M Moses: Liquid CO.sub.2 /cosolvent extraction. CF Systems Corporation, Schiller Pandiscio & Kusmer, October 31, 1989: US04877530 (105 worldwide citation)

Disclosed are a fluid extractant, and a process and apparatus for using the extractant to separate an organic liquid from an aqueous mixture. The extractant comprises a first fluid solvent which is a gas in its near-critical or supercritical state and a cosolvent. A preferred first fluid solvent is ...


60
Hans E Grethlein, Lee H Lynd: Distillation process for ethanol. Trustees of Dartmouth College, Hamilton Brook Smith & Reynolds, October 9, 1990: US04961826 (103 worldwide citation)

A method of distillation employing a heat pump (which may be driven by a compressor) using a vapor stream from within the distillation system as a heat source and a liquid stream from within the distillation system as a heat sink. The selection of heat-source vapors and heat-sink liquid is such that ...



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