公开(公告)号：WO2022005889A1

公开(公告)日：2022-01-06

申请号：PCT/US2021/039067

申请日：2021-06-25

Applicant: CELANESE INTERNATIONAL CORPORATION

Inventor： TIPTON, Billy Charles ,  CHEN, Laiyuan ,  LIU, Yaw-Hwa ,  KUMAR, Dheeraj

IPC: C07C67/05 ,  C07C69/15 ,  G01N30/00

Abstract: Ion chromatography may be used for measuring the concentration of metal ions in various streams of a vinyl acetate production process. For example, a method may comprise: reacting ethylene, oxygen, and acetic acid in the presence of a catalyst and optionally a catalyst promotor like sodium acetate and/or potassium acetate to yield a crude vinyl acetate stream; measuring a concentration of a metal ion of the crude vinyl acetate stream and/or a stream downstream thereof with an ion chromatograph, wherein the metal ion is selected from the group consisting of Group I metal ions, Group II metal ions, transition metal ions, and any combination thereof.