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
Method for using extended security system, extended security system and devices
Device having built-in digital data device and light for insertion into a lamp holder
High-efficiency preambles for communications systems over pseudo-stationary communication channels
Quinazoline compounds and their use in perfume compositions
Automated user interface adjustment
Liquid-level sensor
Proximity-based mobile message delivery
  Randomly Featured Patents
Structural support mounting means for precision, telescoping, linear slide mechanisms
Gasket holder clip
Compositions and methods for delivering RNAI using lipoproteins
X-ray CT image production method and X-ray CT system
Combined fan heater and shoe dryer
Foil bearing
Drywell cover and drywell
Adjustable boxcar door with double roller bogey traverse mechanism and methods for fabricating and installing same
Low temperature oxide layer over field implant mask
Apparatus for scanning sheet-like recording medium