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
Wireless communication system, wireless communication device, wireless communication method, and program
Elementary network description for efficient link between neuronal models and neuromorphic systems
Media processing method and device
Modular connector for touch sensitive device
3D solid-state arrangement for solid state memory
Apparatus and methods for inventory, sale, and delivery of digitally transferable goods
Microbial fuel cell and method of use
  Randomly Featured Patents
Generator power system and method
Torsion-damping flywheel
Memory cell with reduced DIBL and Vss resistance
Automotive rear body structure
Web server with unique identification of linked objects
Audible low-fuel alarm for propane fuel tank
Package for a fragile filled strand
Powder supply system for coating installations with a plurality of application units
Apparatus and method for electronically tracking and duplicating user input to an interactive electronic device
System and method of coating print media in an inkjet printer