ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,774,421, issued on Oct. 27, was assigned to UOP LLC (Rosemont, Ill.).

"Process for cracking to light olefins with isomerization and/or oligomerization" was invented by Sakthivelan Maadasamy Durai (Gurugram, India), Ling Zhou (Palatine, Ill.), Jan de Ren (Arlington Heights, Ill.) and Xi Zhao (Arlington Heights, Ill.).

According to the abstract* released by the U.S. Patent & Trademark Office: "We have discovered a process for catalytic production of olefins comprising passing a feed stream to an isomerization unit to provide a first hydrocarbon stream rich in iso-paraffins. The first hydrocarbon stream is contacted with a first stream of fluid catalyst in a first reactor riser to produ...