US Patent Issued to L'Air Liquide Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude on Sept. 8 for "Method and apparatus for cryogenic air separation" (Chinese, French Inventors)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,729,907, issued on Sept. 8, was assigned to L'Air Liquide Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude (Paris).

"Method and apparatus for cryogenic air separation" was invented by Yongshun Zhang (Hangzhou, China), Alain Briglia (Huille-Lezigne, France) and Xianbiao Zheng (Hangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a method for cryogenic air separation. In the method, part (b2) of the air (b) is compressed in warm booster (7), cooled in heat exchanger (2) and then divided in two, one part (c1) being compressed in a cold booster(9) driven by one turboexpander (11) in which t...