| 摘要 |
A treatment process (softening and/or desalting for liquids, esp. water, using ion exchangers with repeated batch recycling of the ion exchange materials through a regeneration and washing vessel and back to the treatment vessel, is effected with a back-washing vessel before the regeneration and washing vessel; here the material is thoroughly backwashed during at least one cycle, cation and anion materials being separated. These are then fed to separate regeneration and washing vessels, then returned together to the treatment vessel.
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