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
Method and apparatus for internet on-line insurance policy service
Switchgear and method for operating switchgear
Sporting goal practice screen
Connector with shielding device and method for manufacturing connector
Electronic device
Pose-variant face recognition using multiscale local descriptors
  Randomly Featured Patents
Variable-gain multistage amplifier with broad bandwidth and reduced phase variations
Azo containing polyurethanes for drug delivery to the large intestines
Pipe connecting device
Semiconductor device and heat sink used therein
Automatic feeder for barn animals
Manual stapling mode for sheet finishing apparatus
Data transmission system
Article handling machine equipped with a tiltable electrical cabinet
Gas primed powder actuated tool
Mixing arm for a domestic food processor