Lee J Howard, Howard C Rowles: Low pressure process for C.sub.3.sup.+ liquids recovery from process product gas. Air Products and Chemicals, Willard Jones II, James C Simmons, William F Marsh, March 29, 1988: US04734115 (209 worldwide citation)

The invention provides a liquids recovery process useful for the separation and recovery of C.sub.3.sup.+ liquid hydrocarbons from gas mixtures containing high concentrations of lighter components such as are produced by the dehydrogenation of liquefied petroleum gases or by the catalytic cracking o ...

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 (96 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 ...

Steven R Auvil, Rakesh Agrawal: Process for recovering hydrogen from a multi-component gas stream. Air Products and Chemicals, Mark L Rodgers, E Eugene Innis, James C Simmons, March 31, 1987: US04654063 (91 worldwide citation)

The present invention involves an efficient process for recovering hydrogen from a gas mixture containing hydrogen and at least one other component. Separation is effected by integrating a semi-permeable membrane based unit with a non-membrane type separation unit.

John V O Brien, Arthur S Holmes, Richard B Hopewell: Process for the separation of landfill gas. Koch Process Systems, Richard P Crowley, July 21, 1987: US04681612 (89 worldwide citation)

A recycle process for the separation of landfill gas containing a wide variety of impurities into a carbon dioxide product stream and a fuel-grade-pressurized methane product stream, the process providing for the removal of both the impurities and the carbon dioxide in a cryogenic column as a bottom ...

Walter J Olszewski, John H Ziemer: Cryogenic system for producing low-purity oxygen. Union Carbide Corporation, Steven J Hultquist, September 23, 1980: US04224045 (79 worldwide citation)

Low-purity oxygen is produced by fractional distillation of liquefied air. A gas turbine, powered in part by waste nitrogen from the distillation, supplies energy to compress the feed air. Compressing the waste nitrogen prior to turbine expansion provides an increase in energy efficiency.

Mory Houshmand, Kimberly A Kruger, Gerald W Alves, Ricardo Ostaszewski, Noureddine Belhateche: LNG production in cryogenic natural gas processing plants. Williams Field Services Company, Eleanor V Goodall, Jon C Christiansen, April 1, 1997: US05615561 (78 worldwide citation)

A method and system for liquifying natural gas using a cryogenic process is described. The method is well suited for producing high methane purity natural gas which can be used as a vehicle fuel. The invention utilizes residue gas from a cryogenic plant as a natural gas feedstock. The natural gas fe ...

Fred Apffel: Carbon dioxide absorption methanol process. Flexivol, David M Ostfeld, August 29, 1989: US04861360 (78 worldwide citation)

A process is disclosed for the separation of hydrocarbon feed gas mixtures containing carbon dioxide. The process utilizes four distillation units and one absorption unit. The feed gas is fed to the first distillation system where the methane-and-lighter components are separated from the propane-and ...

Roy E Campbell, John D Wilkinson: Hydrocarbon gas processing. Ortloff Corporation, Brumbaugh Graves Donohue & Raymond, July 14, 1981: US04278457 (78 worldwide citation)

The processing of gas streams containing hydrocarbons and other gases of similar volatility to recover components such as ethane, propane and heavier hydrocarbons from a residue gas containing methane is disclosed. In prior art processes, it has been customary to cool incoming raw feed gas and to se ...

Arthur S Holmes, James M Ryan: Cryogenic distillative separation of acid gases from methane. Koch Process Systems, Hamilton Brook Smith and Reynolds, March 9, 1982: US04318723 (77 worldwide citation)

A method of eliminating solids formation in a cryogenic distillative separation of acid gases from methane is disclosed. This method comprises adding a solids-preventing agent to the solids potential zone of the distillation column. Typical solids-preventing agents are one or more C.sub.2 -C.sub.5 a ...

Roy E Campbell, John D Wilkinson, Hank M Hudson: Hydrocarbon gas processing. Elcor Corporation, Brumbaugh Graves Donohue & Raymond, August 8, 1989: US04854955 (75 worldwide citation)

A process for the recovery of propane and heavier hydrocarbon components from a hydrocarbon gas stream is disclosed. The stream is divided into first and second streams. The first stream is cooled to condense substantially all of it and is thereafter expanded to the pressure of the distillation colu ...

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