ALEXANDRIA, Va., April 21 -- United States Patent no. 12,606,658, issued on April 21, was assigned to ExxonMobil Chemical Patents Inc. (Baytown, Texas).
"Isobutane-containing induced condensing agents in fluidized bed polymerization reactions" was invented by Eric J. Markel (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "Ethylene, alpha olefins, and other olefinically unsaturated monomers may be polymerized under fluidized bed polymerization reaction conditions in the presence of a Ziegler-Natta catalyst. A recycle stream featuring an induced condensing agent (ICA) comprising isobutane may increase catalyst productivity while maintaining quality of the polymer product, particularly when the recycle s...