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Method of purifying water

  • US 10,610,860 B2
  • Filed: 09/14/2016
  • Issued: 04/07/2020
  • Est. Priority Date: 09/15/2015
  • Status: Active Grant
First Claim
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1. A method of regenerating an acrylic resin (B2), comprising(A) providing a collection of particles of acrylic resin (B2) that has calculated Hansch parameter of from −

  • 0.2 to 0.5, wherein one or more humic acid, one or more fulvic acid, or a mixture thereof, is adsorbed onto said acrylic resin (B2), and(B) bringing said collection of particles of acrylic resin (B2) into contact with an aqueous solution (RB) having pH of 10 or higher, wherein said aqueous solution (RB) comprises metal cations, hydroxide anions, and non-hydroxide anions, to form a mixture B2RB, wherein said non-hydroxide anions are present in an amount of 0.5% or more by weight based on the weight of said aqueous solution (RB),(C) then separating acrylic resin (B4) from said mixture B2RB.

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