Lummus Technology Inc.

Chart Energy & Chemicals, Inc.

Membrane Technology and Research, Inc

Michael Malsam

Douglas A Ducote, Jr

Timothy P Gushanas

Peter J Turner

Kaaeid A Lokhandwala

Ayyalasomayajula Kumar

Robert Huebel

A system for cooling a gas with a mixed refrigerant includes a heat exchanger that receives and cools a feed of the gas so that a product is produced. The system includes a mixed refrigerant processing system having compression devices and aftercoolers as well as a low pressure accumulator and a high pressure accumulator. Liquid from the low pressure accumulator is subcooled, expanded and directed to the primary refrigeration passage. Liquid from the high pressure accumulator is subcooled, expanded and directed to the primary refrigeration passage. Vapor from the high pressure accumulator is liquefied, expanded and directed to the primary refrigeration passage.

Mixed refrigerant system and method

Provided are mixed refrigerant systems and methods and, more particularly, to a mixed refrigerant system and methods that provides greater efficiency and reduced power consumption via control of a liquid level in a cold vapor separator device.

A process for recovery of natural gas liquids is disclosed, the process including: fractionating a gas stream comprising nitrogen, methane, ethane, and propane and other Chydrocarbons into at least two fractions including a light fraction comprising nitrogen, methane, ethane, and propane, and a heavy fraction comprising propane and other Chydrocarbons; separating the light fraction into at least two fractions including a nitrogen-enriched fraction and a nitrogen-depleted fraction in a first separator; separating the nitrogen-depleted fraction into a propane-enriched fraction and a propane-depleted fraction in a second separator; feeding at least a portion of the propane-enriched fraction to the fractionating as a reflux; recycling at least a portion of the propane-depleted fraction to the first separator. In some embodiments, the nitrogen-enriched fraction may be separated in a nitrogen removal unit to produce a nitrogen-depleted natural gas stream and a nitrogen-enriched natural gas stream.

Nitrogen removal with ISO-pressure open refrigeration natural gas liquids recovery

The present invention relates to an improved process for recovery of natural gas liquids from a natural gas feed stream. The process runs at a constant pressure with no intentional reduction in pressure. An open loop mixed refrigerant is used to provide process cooling and to provide a reflux stream for the distillation column used to recover the natural gas liquids. The processes may be used to recover C+ hydrocarbons from natural gas, or to recover C+ hydrocarbons from natural gas.

ISO-pressure open refrigeration NGL recovery

Nitrogen removal with iso-pressure open refrigeration natural gas liquids recovery

A process for removing carbon dioxide or nitrogen from gas, especially natural gas. The process uses three membrane separation stages without compression between the second and third stages.

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Sugar Land, TX, United States of America

Michael Malsam