| 摘要 |
A method for producing treated liquids by utilizing a treating material such as an ion exchange resin or adsorbent resin, said liquid to be treated being passed through a zone containing said treating material; when said ion treating material is exhausted regenerating said treating material in said zone by passing therethrough a liquid regeneration solution (in a direction opposite the flow of liquid to be treated); said zone having a pressure of at least 10 pounds; and regeneration solution being added in increasingly concentrated amounts in at least two steps and preferably three steps or more.
|
