SULFURIC ACID ELECTROLYSIS METHOD AND SULFURIC ACID ELECTROLYSIS DEVICE

WIPO Patent Application WO/2012/117927

A1

In order to eliminate negative effects due to the accumulation of sulfur in an electrolysis cell for the electrolysis of sulfuric acid, an electrolysis device (1) is provided with: an electrolysis cell (2) which allows sulfuric acid solution to be brought in and released; an electrode constituted by a conductive diamond electrode; a pumping means for pumping sulfuric acid solution into the electrolysis cell; a power supply unit (3) for applying a voltage between the anode and cathode of the electrode; and a power control unit (4) for controlling the power supply unit such that voltage is applied in the forward direction between the anode and cathode during normal electrolysis, and polarity inversion, wherein the voltage applied between the anode and cathode is reversed under a predetermined condition, is executed. The electrolysis device is capable of continuing to perform electrolysis in a stable manner by carrying out normal operations, wherein electrolysis is conducted by applying a voltage in the forward direction between the anode and the cathode, and carrying out polarity inversion operations in between normal operations, wherein the voltage applied to the anode and cathode is reversed, so as to dissolve sulfur deposits, which are produced in the electrolysis cell during a normal operation, in the sulfuric acid solution during an inversion operation.

UCHIDA MINORU (JP)

PCT/JP2012/054371

September 07, 2012

February 23, 2012

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KURITA WATER IND LTD (JP)
UCHIDA MINORU (JP)

C25B1/30; C25B11/12; C25B15/02; H01L21/304

JP2010156034A	2010-07-15
JP2007262531A	2007-10-11
JP2008132468A	2008-06-12

YOKOI Koki (JP)
Koki Yokoi (JP)

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