Class / Patent application number | Description | Number of patent applications / Date published |
062639000 | Helium | 6 |
20080236194 | Cryogenic Flow Valve System - A cryogenic flow valve system for controlling the flow of a cryogenic fluid is disclosed. The system has a valve and an adsorption pump. The valve includes a flow chamber and a moveable member. The cryogenic fluid flows the flow chamber, and the moveable member is in contact with a control fluid. The position of the moveable member controls the flow in the flow chamber. The pressure of the control fluid controls the position of the moveable member. The adsorption pump includes a chamber and a heater. The chamber is in contact with the moveable member and contains an adsorption material for retaining control fluid. The heater heats the adsorption material to control the pressure of the control fluid. | 10-02-2008 |
20090013718 | METHOD FOR THE SIMULTANEOUS RECOVERY OF A PURE HELIUM AND PURE NITROGEN FRACTION - A process for simultaneous recovery of a pure helium and a pure nitrogen fraction from a feed stream containing at least methane, nitrogen and helium, is disclosed. The feed stream is partially condensed and separated into a helium-rich gas fraction and a nitrogen- and methane-rich liquid fraction. The helium-rich gas fraction is conveyed to a purification stage in which a pure helium fraction is recovered by adsorption, permeation and/or rectification. At least one partial stream of the nitrogen- and methane-rich liquid fraction is taken to a rectification process for recovery of a pure nitrogen fraction. | 01-15-2009 |
20130219958 | HE-3 RECOVERY FROM NATURAL HELIUM BY DISTILLATION - A system and method for recovering helium-3 from helium. A distillation column having a top section that is smaller in diameter than a main section is provided. The column also includes an intermediate condenser that condenses vapor from the main section and above a helium feed stream. Reflux to the column can be provided by liquid helium-3 from a conduit or from an overhead condenser. In a preferred cycle, the distillation column is operated at a subatmospheric pressure, and in a temperature range between 2.3 K and 4.3 K. | 08-29-2013 |
20140033764 | Systems And Methods For Recovering Helium From Feed Streams Containing Carbon Dioxide - Systems and methods are provided for recovering helium from a feed comprising helium, carbon dioxide, and at least one intermediate component having a volatility between those of helium and carbon dioxide. In particular, processes of the present invention comprise separating the carbon dioxide and the components of intermediate volatility from the helium at a temperature greater than −82.7° C. to form a helium-rich product stream, wherein the concentration of at least one of the intermediate components in the helium-rich product stream is lower than its concentration in the feed stream, and wherein at least part of the separation is effected by contacting a vapor with a liquid. | 02-06-2014 |
20170234611 | Recovery Of Helium From Nitrogen-Rich Streams | 08-17-2017 |
20180023888 | METHOD FOR RECOVERING HELIUM | 01-25-2018 |