Patents Assigned to Prazair Technology, Inc.
  • Cryogenic rectification system for producing nitrogen and ultra high purity oxygen
    Patent number: 5195324
    Abstract: A cryogenic rectification system wherein bottoms from a single column nitrogen production system are used to produce ultra high purity oxygen in a two column purification system, and bottoms from the first purification column are employed to drive the nitrogen column top condenser to generate additional nitrogen column reflux.
    Type: Grant
    Filed: March 19, 1992
    Date of Patent: March 23, 1993
    Assignee: Prazair Technology, Inc.
    Inventor: Harry Cheung