公开(公告)号：US4058441A

公开(公告)日：1977-11-15

申请号：US581674

申请日：1975-05-28

申请人： Andree Bonnemay nee Couture ,  Jean Royon ,  Jean Bereau ,  Jean-Claude Catonne

发明人： Andree Bonnemay nee Couture ,  Jean Royon ,  Jean Bereau ,  Jean-Claude Catonne

IPC分类号： B01D61/44 ,  B01D61/50 ,  B01D61/54 ,  C23F1/46 ,  C23G1/36 ,  C25C1/06 ,  C25B1/22

CPC分类号： B01D61/44 ,  C23G1/36 ,  C25C1/06 ,  Y02P10/212

摘要： Regeneration of spent hydrochloric acid after use for pickling iron, whichherefore contains iron chlorides, by electrolysis in the cathodic and intermediate compartments of an electrodialysis cell. The installation includes electric circuitry for connecting up the anode as well as input conduits for the spent acid but otherwise consists essentially of an electrodialysis cell with an uneven number of compartments wherein each cathodic compartment is separated from the adjacent intermediate compartment by an anion-selective membrane while a cation-selective membrane separates each intermediate compartment from the anodic compartment, the latter being filled with an anolyte whose total Faraday yield for water oxidation is close to 1. Electrolysis is conducted with current densities at the cathode of 0.1 - 20 A/dm.sup.2, at the anode corresponding to the water oxidation reaction and at the membranes such that their perm-selectivity is close to 1. The ionic strengths in equivalents of the regenerated solution and of the untreated spent acid are the same.

摘要翻译： 废酸盐在使用后由于在电渗析池的阴极和中间隔室中电解而酸化铁，因此含有氯化铁。 该装置包括用于连接阳极的电路以及用于废酸的输入管道，但是其它部分基本上由具有不均匀数量隔室的电渗析池组成，其中每个阴极室通过阴离子选择性膜与相邻的中间隔室分离 而阳离子选择性膜将每个中间隔室与阳极室隔开，后者充满阳极电解液，其全部法拉第水分氧化产率接近1.电解以阴极0.1-20A / dm 2的电流密度进行 在对应于水氧化反应的阳极和膜处，使得它们的选择性接近1。再生溶液和未处理的废酸的当量离子强度相同。