发明名称 |
IMPROVED OPERATION AND REGENERATION OF PERMSELECTIVE ION-EXCHANGE MEMBRANE IN BRINE ELECTROLYSIS CELLS |
摘要 |
A method of operating and regenerating an electrolysis cell for electrolysing aqueous alkali metal halide solution and having permselective cation exchange membrane forming an anolyte and a catholyte compartment. The method comprises the steps of; feeding to and electrolyzing in said cell a brine which, at least prior to the brine's becoming part of the anolyte, contains no more than 5 ppm hardness (expressed as ppm calcium) and no more than 70 ppm carbon dioxide, carbonic acid, carbonate and bicarbonate (expressed as ppm CO2); regenerating the membrane by contacting the membrane on at least one of its sides with a solution capable of dissolving the multivalent cation compounds fouling the membrane for a time sufficient to dissolve a substantial amount of the compounds, the solution having a pH lower than the pH of the electrolyte which contacted that side of the membrane during the normal cell electrolysis. |
申请公布号 |
DE3272448(D1) |
申请公布日期 |
1986.09.11 |
申请号 |
DE19823272448 |
申请日期 |
1982.06.22 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
BURNLEY, HARRY STEVENS, JR.;GANTT, GARY RUSSELL |
分类号 |
C25B1/46;C25B13/00;C25B15/00;(IPC1-7):C25B15/00 |
主分类号 |
C25B1/46 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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