PURIFICATION OF A METHANOL STREAM

摘要

Acetaldehyde may be effectively removed from a contaminated methanol stream using a distillation method wherein a solvent stream comprised of a relatively heavy polar compound such as water or propylene glycol is utilized as an extractive distillation solvent. Following the separation of the polar compound from the bottoms stream obtained by extractive distillation, the purified methanol may be recycled for use as a reaction solvent in an olefin epoxidation process.