Process for dehydration of hexafluoroacetone hydrate

Details Process for dehydration of hexafluoroacetone hydrate Process for dehydration of hexafluoroacetone hydrate

2011-04-05

2011-04-05

Witherspoon, Sikarl A (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S411000

Reexamination Certificate

active

07919657

ABSTRACT:
To provide a process for producing anhydrous hexafluoroacetone from hexafluoroacetone hydrate. To provide a process taking environment into consideration, that does not require a treatment of wastes, such as waste sulfuric acid, containing organic substances, which is inevitable in processes conducted hitherto using concentrated sulfuric acid, fuming sulfuric acid, and the like.A process for dehydrating a hexafluoroacetone hydrate, comprising introducing a hexafluoroacetone hydrate and hydrogen fluoride either as a mixture or separately into a distillation column, obtaining a composition containing hexafluoroacetone or a hexafluoroacetone-hydrogen fluoride adduct and hydrogen fluoride as a low boiling component, and obtaining a composition containing water and hydrogen fluoride as a high boiling component.

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