Low temp air separating system for prodn. of medium-pureness oxygen and medium-pureness nitrogen

Application Number: 00108243
Application Date: 2000.04.30
Publication Number: 1274069
Publication Date: 2000.11.22
Priority Information: 1999/5/4 US 09/304102
International: F25J3/04
Applicant(s) Name: Praxair Technology Inc.
Inventor(s) Name: V. Sirinivason;M. M. Sha;A. C. -P.Liu
Patent Agency Code: 72001
Patent Agent: lu xinhua
Abstract A cryogenic air separation system wherein feed air is initially processed to produce a vapor and a liquid, the vapor is then processed in the rectifying section of a reflux condenser to produce moderate purity nitrogen, and the liquid is processed in the stripping section of the reflux condenser to produce moderate purity oxygen.