| 摘要 |
A process for dehydrating acetic acid containing up to about 20 weight percent water is disclosed wherein the crude acetic acid is cooled sufficiently to crystallize a substantial portion of pure acetic acid, and the remaining mother liquor, i.e., uncrystallized material, is vaporized under vacuum, i.e., at a pressure not exceeding about 15 mm. Hg, from the acetic acid crystals at a temperature between the freezing point of acetic acid and the eutectic temperature.
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