ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,189, issued on March 17, was assigned to Celanese International Corp. (Irving, Texas).
"Removal of acetals from process streams" was invented by David Lee (Houston), Yaw-Hwa Liu (Missouri City, Texas) and Ronald D. Shaver (Houston).
According to the abstract* released by the U.S. Patent & Trademark Office: "A process for producing acetic acid is provided that is capable of lowering acetaldehyde mass composition in acetic acid. The process for producing acetic acid according to the present invention comprises at least one distillation step that satisfies the following operating conditions (i) temperature in a lower portion of the distillation column is not less than 40deg C.; (ii...