Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Piezoelectric quasi-resonance linear motors based on acoustic standing waves with combined resonator
Pressing mold for optical lenses and method for manufacturing glass optical lenses
High-speed comparator with asymmetric frequency response
Organic electroluminescence element
Rack
Illuminating waveguide fabrication method
Shield for vacuum circuit breaker
  Randomly Featured Patents
Base for a drilling device
Selectively doped electrostatic discharge layer for an integrated circuit sensor
Heating device
Vacuum cleaner including a squeegee
Fitted bedspread with pillow inserts
Method and system for non-invasive determination of the main cardiorespiratory parameters of the human body
Light emitting device having a layer with a metal oxide and a benzoxazole derivative
Base site and method for GPS-based regional time synchronization
Electrical control method and apparatus for combustion engines
Elastic wave device having an electrode finger with a side edge projection