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Process for preparation of stable aqueous solutions of zirconium chelates

  • US 5,466,846 A
  • Filed: 11/16/1994
  • Issued: 11/14/1995
  • Est. Priority Date: 11/16/1994
  • Status: Expired due to Term
First Claim
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1. A method of preparing solutions of aqueous zirconium chelates, comprising:

  • a. reacting ammonium hydroxide, sodium hydroxide, potassium hydroxide, water soluble amines or amine derivatives or alkali metal carbonates or bicarbonates with an alpha hydroxy carboxylic acid to prepare substantially neutral solutions of the corresponding alpha-hydroxycarboxylic salt;

    b. adding said alpha-hydroxycarboxylic salt to a slurry of zirconium basic sulfate or a solution of zirconium orthosulfate or zirconium sulfate and mixtures thereof to form a zirconium chelate.

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