US Patent Issued to Sulzer Management on June 24 for "Process and apparatus for preparing purified styrene composition using divided-wall column and crystallization unit" (Swiss, American Inventors)

ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,215, issued on June 24, was assigned to Sulzer Management AG (Winterthur, Switzerland).

"Process and apparatus for preparing purified styrene composition using divided-wall column and crystallization unit" was invented by Rahul Khandelwal (Katy, Texas), Joseph C. Gentry (Houston), Erik Temmel (Basel, Switzerland) and Manfred Stepanski (Buchs, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for preparing a purified styrene composition includes providing a crude hydrocarbon composition containing styrene, subjecting the crude hydrocarbon composition to a distillation in a divided-wall column to produce an overhead hydrocarbon strea...