ELECTROLYSIS METHOD USING TWO-CHAMBER ION-EXCHANGE MEMBRANE SODIUM CHLORIDE ELECTROLYTIC CELL EQUIPPED WITH GAS DIFFUSION ELECTRODE

Title:

ELECTROLYSIS METHOD USING TWO-CHAMBER ION-EXCHANGE MEMBRANE SODIUM CHLORIDE ELECTROLYTIC CELL EQUIPPED WITH GAS DIFFUSION ELECTRODE

Document Type and Number:

WIPO Patent Application WO/2010/119918

Kind Code:

A1

Abstract:

Disclosed is an electrolysis method, whereby sodium chloride concentration of an aqueous caustic soda solution formed through electrolysis in a two-chamber ion-exchange membrane sodium chloride electrolytic cell, which is equipped with a gas diffusion electrode as a cathode and divided into an anode chamber containing an anode and a cathode gas chamber containing the cathode that are partitioned by an ion-exchange membrane, is lowered. In a two-chamber ion-exchange membrane electrolytic cell (1) using a gas diffusion electrode (7), electrolysis is performed while reducing the pressure difference between the liquid pressure in the anode chamber and the gas pressure in the cathode gas chamber, i.e., the pressure calculated by subtracting [oxygen-containing gas pressure in cathode chamber (measured by manometer (18))] or [gas pressure at oxygen-containing gas inlet (14)] from [(liquid pressure in anode chamber applied to ion-exchange membrane when anode chamber is filled up with aqueous sodium chloride solution) being equal to (depth of aqueous sodium chloride solution)×(density of aqueous sodium chloride solution)/2].

Inventors:

SUGIYAMA MIKIHITO (JP)
IGUCHI YUKINORI (JP)
ASAUMI KIYOHITO (JP)

Application Number:

PCT/JP2010/056744

Publication Date:

October 21, 2010

Filing Date:

April 15, 2010

Export Citation:

Click for automatic bibliography generation Help

Assignee:

CHLORINE ENG CORP LTD (JP)
KANEKA CORP (JP)
TOAGOSEI CO LTD (JP)
SUGIYAMA MIKIHITO (JP)
IGUCHI YUKINORI (JP)
ASAUMI KIYOHITO (JP)

International Classes:

C25B1/16; C25B9/19

Foreign References:

JP2001323084A	2001-11-20
JPH05339771A	1993-12-21
JPH05255883A	1993-10-05
JPS5487696A	1979-07-12
JP2006322018A	2006-11-30
JP2000064074A	2000-02-29

Other References: