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Cleaning compositions with water insoluble conversion agents and methods of making and using them

  • US 8,071,528 B2
  • Filed: 05/02/2008
  • Issued: 12/06/2011
  • Est. Priority Date: 05/04/2007
  • Status: Active Grant
First Claim
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1. A solid cleaning composition comprising:

  • (a) 1 to 50 wt % of a conversion agent comprising a water insoluble compound selected from the group consisting of magnesium oxide, magnesium and titanium hydroxides, and combinations thereof;

    (b) greater than about 20 wt % of an alkalinity source, wherein the conversion agent causes calcium hardness ions in a water source to substantially precipitate in a non-calcite crystalline form;

    (c) about 1 to about 50 wt % of a salt selected from the group consisting of monovalent alkali compounds having halide or sulfate as the anion; and

    d) 15 to about 50 wt % water; and

    the composition is free of chelating agent, phosphate and water soluble magnesium sources.

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