ALEXANDRIA, Va., June 16 -- United States Patent no. 12,655,079, issued on June 16, was assigned to NOVA CHEMICALS (INTERNATIONAL) S.A. (Fribourg, Switzerland).

"Feed purification in ethane ODH process" was invented by Vasily Simanzhenkov (Calgary, Canada), Shahin Goodarznia (Calgary, Canada), Bolaji Olayiwola (Calgary, Canada) and Jeffrey Kluthe (Lacombe, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A feed stream including ethane is flowed to a purification unit that includes a first oxidative dehydrogenation catalyst. The feed stream is contacted with the first oxidative dehydrogenation catalyst at a first temperature to reduce a concentration of impurities in the feed stream to produce a purified...