METHOD FOR PRODUCING HYDROGEN FLUORIDE

Title:

METHOD FOR PRODUCING HYDROGEN FLUORIDE

Document Type and Number:

WIPO Patent Application WO/2011/004715

Kind Code:

A1

Abstract:

Disclosed is a novel method for producing hydrogen fluoride, wherein various calcium fluoride sources can be used and occurrence of a second paste state can be effectively prevented. Specifically disclosed is a method for producing hydrogen fluoride by reacting calcium fluoride with sulfuric acid, which comprises: a step (a) wherein calcium fluoride particles having an average particle diameter of 1-40 μm and sulfuric acid are mixed and reacted at a sulfuric acid/calcium fluoride molar ratio of 0.9-1.1 at a temperature of 0-70˚C, thereby obtaining a solid reaction mixture; and a step (b) wherein the solid reaction mixture is heated to a temperature of 100-200˚C and reacted, thereby producing hydrogen fluoride in a gas phase.

Inventors:

YOSHIMURA TOSHIKAZU (JP)
IMOTO MASAYOSHI (JP)
SASATANI ARATA (JP)
TABUCHI AKIKAZU (JP)

Application Number:

PCT/JP2010/060709

Publication Date:

January 13, 2011

Filing Date:

June 24, 2010

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)
YOSHIMURA TOSHIKAZU (JP)
IMOTO MASAYOSHI (JP)
SASATANI ARATA (JP)
TABUCHI AKIKAZU (JP)

International Classes:

C01B7/19

Foreign References:

JP2005132652A	2005-05-26
JP2004352517A	2004-12-16
JP2002316805A	2002-10-31
US2932557A	1960-04-12
US3825655A	1974-07-23
JPH0440282B2	1992-07-02
JP2002316805A	2002-10-31
JP2004352517A	2004-12-16
JP2005132652A	2005-05-26
JP2007112683A	2007-05-10

Other References: