×

Absorption-adsorption system for purifying cryogenic gases

  • US 4,043,770 A
  • Filed: 12/19/1975
  • Issued: 08/23/1977
  • Est. Priority Date: 12/20/1974
  • Status: Expired due to Term
First Claim
Patent Images

1. In the purification of semi-pure gas containing a minor quantity of a gaseous impurity, the steps comprising:

  • a. passing said semi-pure gas at a temperature substantially above the condensation temperature of said gaseous impurity through a first adsorber loaded with said gaseous impurity to the extent of having a pressure of gaseous impurity emanating from the adsorbed impurity higher than the partial pressure of said gaseous impurity in the semi-pure gase, to desorb and entrain said gaseous impurity, thereby regenerating said first adsorber;

    b. cooling resultant desorption gas containing said gaseous impurity to below the condensation temperature of said gaseous impurity to partially liquefy said gaseous impurity;

    c. separating said liquefied gaseous impurity from equilibrium gas containing residual amounts of said gaseous impurity; and

    d. passing said equilibrium gas, at a temperature below said condensation temperature of said gaseous impurity in step (b), through a second adsorber previously regenerated as in step (a), and removing at least a portion of said residual amounts of gaseous impurity to yield a purified gas.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×