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 (210 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 (109 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 ...

Leroy A Pantermuehl, Thomas E Krisa: Carbon dioxide recovery. Amoco Corporation, L Wayne White, August 9, 1988: US04762543 (104 worldwide citation)

A novel gas processing method is disclosed which is useful in separating and recovering carbon dioxide from gas streams having a high carbon dioxide content (e.g., 85-95 mol percent) and a low hydrocarbon/nitrogen content. The method is particularly useful in processing gas streams produced during c ...

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 (92 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 (91 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 ...

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 (86 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 ...

Eric T Cole, Eugene R Thomas, Ronald R Bowen: Process for liquefying a natural gas stream containing at least one freezable component. Exxon Production Research Company, G D Lawson, September 28, 1999: US05956971 (85 worldwide citation)

This invention relates to a process for producing pressurized liquid rich in methane from a multi-component feed stream containing methane and a freezable component having a relative volatility less than that of methane. The multi-component feed stream is introduced into a separation system having a ...

Roy E Campbell, John D Wilkinson: Hydrocarbon gas processing. Ortloff Corporation, Brumbaugh Graves Donohue & Raymond, July 14, 1981: US04278457 (85 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 ...

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 (82 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 ...

Roy E Campbell, John D Wilkinson: Hydrocarbon gas processing. The Ortloff Corporation, Brumbaugh Graves Donohue & Raymond, June 12, 1979: US04157904 (82 worldwide citation)

A process for separating hydrocarbon gases is described for the recovery of gases such as ethane and heavier hydrocarbons from natural gas streams or similar refinery or process streams. In the process described, the gas to be separated is cooled at a high pressure to produce partial condensation. T ...