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Method of removing heavy metals from silicate sources during silicate manufacturing

  • US 20070107634A1
  • Filed: 11/17/2005
  • Published: 05/17/2007
  • Est. Priority Date: 11/17/2005
  • Status: Active Grant
First Claim
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1. A method of producing a metal silicate material comprising the steps of:

  • a) providing a silicon dioxide source;

    b) reacting said silicon dioxide source with a caustic to form a metal silicate solution;

    b) introducing a calcium phosphate material selected from the group consisting of hydroxyapatite, dicalcium phosphate, tricalcium phosphate, and any mixtures thereof, to said formed metal silicate solution; and

    d) removing any resultant insoluble heavy metal complexes and/or salts from said metal silicate solution.

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