Title:
REMOVAL OF CHLORATE IN CAUSTIC SOLUTION BY ELECTRODEPOSITION IRON
Document Type and Number:
Japanese Patent JPS5717422
Kind Code:
A
Abstract:
A process for removing chlorate from a caustic solution in an electrolytic cell by the reduction of the chlorate with metallic iron. The process is particularly distinguished by the steps of contacting the caustic solution with iron (8a) to reduce the chlorate to chloride, contacting the caustic solution containing dissolved iron therein with a conductive substrate (8b) to electrolytically precipitate the iron on the substrate, thus providing a caustic solution which is substantially free from iron and chlorate ions, removing the purified portion of the caustic solution from the cell, using the iron coated substrate (8b) for treating an untreated portion of the caustic solution to substantially reduce the chlorate to chloride, and reusing the iron reduced substrate for recovering dissolved iron from the caustic solution. The process of this invention substantially decreases the chlorate content of caustic solutions and also recovers dissolved iron in the solution on a substrate for reuse and further reduction of chlorate of an untreated portion of the caustic solution.
Inventors:
PORTA AUTUSTO
MOSETTI JACQUES
MOSETTI JACQUES
Application Number:
JP9080580A
Publication Date:
January 29, 1982
Filing Date:
July 04, 1980
Export Citation:
Assignee:
DOW CHEMICAL CO
International Classes:
C01D1/28; C01D1/40; C25B15/08; (IPC1-7): C01D1/28; C01D1/40