| 摘要 |
<p>By using an aqueous solution of inorganic carbonate, bicarbonate and/or hydroxide as the catholyte in an electrodialysis process, acids containing a multivalent metal in the anion are prepared substantially free of anionic impurities, substantially pure electroplating-type acids with a multivalent metal in the anion such as chromic, molybdic and tungstic acids are prepared from salts of such acids and multivalent metal cations are separated from anions containing sulfur, phosphorus, halogen or carbon in aqueous solutions such as found in rinse waters from electroplating processes.</p> |
