1
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 (103 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 ...


2
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 (90 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 ...


3
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 (82 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 ...


4
Arthur S Holmes, James M Ryan: Distillative separation of carbon dioxide from light hydrocarbons. Koch Process Systems, Richard P Crowley, September 21, 1982: US04350511 (55 worldwide citation)

An improved distillative separation of carbon dioxide and light hydrocarbons is disclosed in which the formation of an azeotrope between these components is prevented by addition of an agent to said distillation column and in which prevention of the azeotrope allows a more complete separation to be ...


5
James M Ryan, John V O Brien: Distillative separation employing bottom additives. Koch Process Systems, Richard P Crowley, January 31, 1984: US04428759 (21 worldwide citation)

An improved method for the distillation of a feed stream containing hydrocarbon components, which method is directed toward the production of a bottom product stream and an overhead product stream, both with desired specifications, which method comprises recycling a minor portion of the bottom produ ...


6
John V O Brien: Distillative separation of methane and carbon dioxide. Koch Process Systems, Hamilton Brook Smith & Reynolds, May 17, 1983: US04383842 (17 worldwide citation)

An improvement in a Ryan/Holmes separation of methane from carbon dioxide is disclosed wherein the upper portion of a distillation column is operated at temperatures above the triple point of carbon dioxide, i.e., -70.degree. F., while still effectuating a separation of methane from carbon dioxide. ...


7
James M Ryan, John V O Brien: Energy-saving distillative separation using low-temperature heat input. Koch Process Systems, Richard P Crowley, April 24, 1984: US04444576 (17 worldwide citation)

A method for the distillative separation of a feed stream containing light hydrocarbons and acid gas components in a distillative column into an enriched overhead product, such as a carbondioxide fraction, and an enriched bottom product of C.sub.2 + and hydrogen sulfide, the method which comprises: ...


8
James M Ryan, Arthur S Holmes: Distillative separation of carbon dioxide from hydrogen sulfide. Koch Process Systems, Richard P Crowley, May 17, 1983: US04383841 (15 worldwide citation)

A distillative separation of carbon dioxide and hydrogen sulfide is improved by adding a C.sub.3 -C.sub.6 alkane, a mixture of C.sub.3 -C.sub.6 alkanes, SO.sub.2 or SO.sub.3 to a distillation column to increase the relative volatility of carbon dioxide to hydrogen sulfide. Increasing the relative vo ...


9
Richard F Abrams, James G Chellis: Radioactive waste treatment apparatus. Koch Process Systems, Hamilton Brook Smith and Reynolds, November 22, 1983: US04416855 (14 worldwide citation)

Radioactive waste treatment apparatus in which the waste is burned in a controlled combustion process, the ash residue from the combustion process is removed and buried, the gaseous effluent is treated in a scrubbing solution the pH of which is maintained constant by adding an alkaline compound to t ...


10
Richard B Hopewell: Process for prevention of water build-up in cryogenic distillation column. Koch Process Systems, Richard P Crowley, January 5, 1988: US04717408 (13 worldwide citation)

A process by which a vapor side product stream is taken from the bottom section of a cryogenic distillation column, such as a propane or ethane recovery column, which process optionally employs a nonpolar liquid additive for use in the separation of acid gases from a hydrocarbon feed stream. The wit ...



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