Resources Contact Us Home
Enhanced helium recovery

Image Number 9 for United States Patent #5632803.

The disclosed hybrid membrane and pressure swing adsorption process can recover helium from source streams of about 0.5 to 5 percent by volume helium and concentrate the helium to a concentration of greater than about 98 percent by volume. The process comprises a membrane separation followed by two stages of pressure swing adsorption which are used in series. The source gas will primarily contain hydrocarbons but will contain some nitrogen. The membrane unit will contain a semipermeable membrane which is permeably selective for helium and will to the extent feasible reject hydrocarbons. The permeate gas will be increased in helium content by 2 to 10 times. Part of the residue gas is used in the regeneration of the adsorbent beds in the first stage of pressure swing adsorption. Each stage of pressure swing adsorption will contain a plurality of adsorbent beds, and will be cycled through multiple phases. In the first stage the adsorbent beds will sequentially undergo the phases of adsorption, recycle, depressurization, evacuation, helium pressurization and recycle feed pressurization. The product gas from the first stage is flowed to the second stage and in the second stage sequentially will undergo the phases of adsorption, depressurization, evacuation, purge, and helium pressurization. The offgas from the evacuation and purge in the second stage is flowed to input to the first stage. The process efficiently produces a product stream with a helium content of more than 98 percent by volume.

  Recently Added Patents
Configurable logic cells
Multipoint photonic doppler velocimetry using optical lens elements
Atomic oscillator and manufacturing method
Rules-based approach to transferring and/or viewing medical images
Electronic document reading devices
Simulation tool for air traffic communications security
Image processing apparatus, image forming system, and computer-readable storage medium
  Randomly Featured Patents
Rapid identification of Nocardia farcinica
Rails of pearlitic steel with high wear resistance and toughness and their manufacturing methods
Liquid drop discharging head and liquid drop discharging device
Postoperative anesthetic delivery device and associated method for the postoperative treatment of pain
Method and system for measuring color difference
Fuel limiting method and apparatus for an internal combustion vehicle
Mounting apparatus for securing an electrical appliance to a suspended ceiling structure
Container with secondary containment venting by form of construction
Suspension assembly static attitude and distance measuring instrument