Back to results
US 4,224,112 AGranted
Recovery of 1,1-dihydroheptafluorobutanol from water by distillation
AssigneePhillips Petroleum Company
InventorWilliam V. Childs
Life of this patent
Estimating the term…
Abstract
Esters are treated with alkali metal borohydride to produce alcohols. Substantially constant boiling admixtures of: methanol/methyl heptafluorobutyrate, water/1,1-dihydroheptafluorobutanol, and water/methyl heptafluorobutyrate are described.
Claims5
A substantially constant boiling admixture of water and 1,1-dihydroheptafluorobutanol characterized by a boiling point of about 83.degree.-85.degree. C. at substantially atmospheric pressure.
A process for removing water from a mixture comprising water and 1,1-dihydroheptafluorobutanol which comprises the steps of:
- (a) distilling said mixture comprising water and 1,1-dihydroheptafluorobutanol to produce an overhead water/1,1-dihydroheptafluorobutanol azeotrope.
- (b) condensing said azeotrope,
- (c) cooling said condensed azeotrope, thereby effecting a phase separation into a light predominantly aqueous liquid phase, and a heavy predominantly organic liquid phase, and
- (d) returning said heavy predominantly organic liquid phase to said step (a) until the water content in the original mixture of said step (a) is substantially exhausted.
1 more element
Dependencies are inferred from the claim text.