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Treatment of aqueous waste solutions

  • US 3,259,568 A
  • Filed: 03/21/1963
  • Issued: 07/05/1966
  • Est. Priority Date: 03/21/1963
  • Status: Expired due to Term
First Claim
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1. THE PROCESS WHICH COMPRISES CONTACTING AN AQUEOUS WASTE SOLUTION CONTAINING ORGANIC ANIONIC SURFACE ACTIVE AGENTS WITH A LIQUID ORGANIC PHASE COMPRISING A WATERIMMISCIBLE ORGANIC SOLVENT AND AN ANIION EXCHANGE MATERIAL TO EXTRACT AT LEAST A PORTION OF THE ORGANIC ANIONIC SURFACE ACTIVE AGENTS INTO THE ORGANIC PHASE, SEPARATING THE LOADED ORGANIC PHASE FROM THE AQUEOUS PHASE AND TREATING SAID AQUEOUS PHASE WITH A BASIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALI, ALKALINE EARTH AND RARE EARTH METAL OXIDES, HYDROXIDES, BASIC SALTS AND MIXTURES THEREOF TO FORM A PRECIPITATE.

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