US Patent Issued to Praxair Technology on Jan. 28 for "System and method for cryogenic air separation using four distillation columns including an intermediate pressure column" (New York Inventor)

ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,209,802, issued on Jan. 28, was assigned to Praxair Technology Inc. (Danbury, Conn.).

"System and method for cryogenic air separation using four distillation columns including an intermediate pressure column" was invented by Neil M. Prosser (Lockport, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system and method for separating air by cryogenic distillation using a four column arrangement including a higher pressure column, a lower pressure column, an intermediate pressure column, and an argon column is provided. The disclosed system and method is particularly suited for production of normal purity oxygen and employs a once-through kettle colum...