CONTINUOUS ELECTROLYSIS METHOD BY MEANS OF ELECTROLYTIC BATH FOR POLYSULFIDE MANUFACTURING, AND ELECTROLYSIS DEVICE FOR IMPLEMENTING SAME

Title:

CONTINUOUS ELECTROLYSIS METHOD BY MEANS OF ELECTROLYTIC BATH FOR POLYSULFIDE MANUFACTURING, AND ELECTROLYSIS DEVICE FOR IMPLEMENTING SAME

Document Type and Number:

WIPO Patent Application WO/2014/054815

Kind Code:

A1

Abstract:

[Problem] To provide an electrolysis method, and a device therefor, with which the influence of scale that adheres over time is prevented and a stable continuous operation is enabled in an electrolysis system wherein a white liquor used in a digestion process in a kraft pulping method, which is a pulp manufacturing method, is subjected to an electrolysis process, thereby oxidizing sodium sulfide in the white liquor and electrolytically generating polysulfide. [Solution] An electrolysis method and an electrolysis device therefor with which an increase in the electrolytic bath voltage over time is prevented without stopping the electrolysis, said method and device being characterized in that a two-chamber electrolytic bath having a membrane that partitions an anode chamber and a cathode chamber is used, and during operation of the two-chamber electrolytic bath, wherein a white liquor used in a pulp manufacturing process and containing sulfide ions is supplied to the anode chamber and direct current is supplied to the electrolytic bath, thereby generating polysulfide in the anode chamber by means of electrolysis, a white liquor used in a pulp manufacturing process and containing sulfide ions, and containing a scale cleaning agent and/or a scale preventative, is supplied to the anode chamber.

Inventors:

SUYAMA KENICHIRO (JP)
KUROSU KAZUHIRO (JP)
KATO MASAAKI (JP)
OTSU HIDEO (JP)

Application Number:

PCT/JP2013/077191

Publication Date:

April 10, 2014

Filing Date:

September 30, 2013

Export Citation:

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Assignee:

JUJO PAPER CO LTD (JP)
CHLORINE ENG CORP LTD (JP)

International Classes:

C25B15/08; C02F1/46; C25B1/14; C25B9/19; C25B15/00; D21C11/00

Foreign References:

JP2009242897A	2009-10-22
JP2001081683A	2001-03-27
JPS61259754A	1986-11-18
JPS5392981A	1978-08-15
JPH11343106A	1999-12-14
JPH078954A	1995-01-13
JP2009242897A	2009-10-22

Other References: