Title:
電解酸化を用いた多硫化物の製造方法
Document Type and Number:
Japanese Patent JP4312869
Kind Code:
B2
Abstract:
The present invention has an object to obtain a cooking liquor containing polysulfide-sulfur at a high concentration by minimizing by-production of thiosulfate ions. The present invention is a method for producing polysulfides, which comprises introducing a solution containing sulfide ions into an anode compartment of an electrolytic cell comprising the anode compartment provided with a porous anode, a cathode compartment provided with a cathode, and a diaphragm partitioning the anode compartment and the cathode compartment, for electrolytic oxidation to obtain polysulfide ions, characterized in that the porous anode is disposed so that a space is provided at least partly between the porous anode and the diaphragm, and the apparent volume of the porous anode is from 60% to 99% based on the volume of the anode compartment.
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Inventors:
Tetsuji Shimodaira
Tatsuya Ando
Junji Tanaka
Keigo Watanabe
Yasunori Minamisato
Tatsuya Ando
Junji Tanaka
Keigo Watanabe
Yasunori Minamisato
Application Number:
JP5103399A
Publication Date:
August 12, 2009
Filing Date:
February 26, 1999
Export Citation:
Assignee:
Asahi Glass Co., Ltd.
Kawasaki Chemical Industry Co., Ltd.
NIPPON PAPER INDUSTRIES CO.,LTD.
Kawasaki Chemical Industry Co., Ltd.
NIPPON PAPER INDUSTRIES CO.,LTD.
International Classes:
C01B17/34; C25B1/00; C25B3/00; C25B11/03; D21C11/00; D21C11/04
Domestic Patent References:
| JP11343106A | ||||
| JP8512099A | ||||
| JP8284089A |
Attorney, Agent or Firm:
Hirokuni Kamo