METHOD OF PURIFYING FLUOROMETHYL 1,1,1,3,3,3-HEXAFLUOROISOPROPYL ETHER

Title:

METHOD OF PURIFYING FLUOROMETHYL 1,1,1,3,3,3-HEXAFLUOROISOPROPYL ETHER

Document Type and Number:

WIPO Patent Application WO/1995/026949

Kind Code:

A1

Abstract:

A method of purifying fluoromethyl 1,1,1,3,3,3-hexafluoroisopropyl ether by distilling the crude ether in the presence of a compound selected from among hydroxides, hydrogenphosphates, phosphates, hydrogencarbonates, borates and sulfites of alkali metals, alkali metal acetates and phthalates, and boric acid. According to this method, a highly pure fluoromethyl 1,1,1,3,3,3-hexafluoroisopropyl ether to be used as a medicine, especially as an inhalation anesthetic, can be produced by effectively inhibiting the decomposition of the ether in the distillation step.

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Inventors:

KAWAI TOSHIKAZU (JP)
YOSHIMURA TAKAAKI (JP)
KUMAKURA MANAMI (JP)
WATANABE MINEO (JP)

Application Number:

PCT/JP1995/000537

Publication Date:

October 12, 1995

Filing Date:

March 23, 1995

Export Citation:

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Assignee:

CENTRAL GLASS CO LTD (JP)
KAWAI TOSHIKAZU (JP)
YOSHIMURA TAKAAKI (JP)
KUMAKURA MANAMI (JP)
WATANABE MINEO (JP)

International Classes:

C07C41/42; C07C41/46; C07C43/12; C07C41/44; (IPC1-7): C07C43/12; C07C41/42; C07C41/46

Foreign References:

US4328376A	1982-05-04
JPS56501806A	1981-12-10

Other References: