ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,453,939, issued on Oct. 28, was assigned to Arkema France (Puteaux, France).
"Separation of gases from air" was invented by Guillaume Ortiz (Lacq, France) and Quitterie Persillon (Lacq, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to the use of a zeolitic adsorbent material based on faujasite (FAU) zeolite crystals, the Si/AI mole ratio of which is between 1.00 and 1.20, and the non-zeolitic phase (NZP) content of which is such that 0greater thanNZPless than equal to25%, for the non-cryogenic separation of industrial gases by (V)PSA, in particular of the air gases.The invention also relates to respiratory assistanc...