DEHYDRATING METHOD FOR HYDROGEN FLUORIDE

Title:

DEHYDRATING METHOD FOR HYDROGEN FLUORIDE

Document Type and Number:

Japanese Patent JPH01157404

Kind Code:

A

Abstract:

A method for controlling the water present in hydrogen fluoride is described which effectively removes all the water contained in the hydrogen fluoride solution to form other compounds that either have extremely low vapor pressure or are acceptable in a process such as chemical vapor purification. The method involves as one of the steps the contacting of a reactive metal halide with a hydrogen fluoride containing water. The metal halide reacts with the water contained in the hydrogen fluoride solution yielding a metal oxide, hydrogen halide, and anhydrous hydrogen fluoride. The metal oxide is a solid, with low vapor pressure, thereby effectively removing oxygen-bearing species from the hydrogen fluoride.

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Inventors:

JIYOZEFU II ISUTAA
ROBAATO SHII FUORUWAIRAA

Application Number:

JP27633988A

Publication Date:

June 20, 1989

Filing Date:

November 02, 1988

Export Citation:

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Assignee:

GTE LABORATORIES INC

International Classes:

C01B7/07; C01B7/19; C01B23/00; (IPC1-7): C01B7/19

Attorney, Agent or Firm:

Motohiro Kurauchi (1 outside)

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