Monday, December 24, 2012

Metallic Stearates


  • Compounds of long-chain fatty acids with metals of different valencies some Stearates are not soluble in water.
  • Typical metallic Stearates are Calcium, Zinc, Magnesium and Aluminium.
  • Production process involves when stearic acid is heated to melt in excess water then saponified with strong alkali solution to give soluble soap and water. This mix is reacted with desired products metal salt solution to obtain desired Stearate and a water soluble salt.  For Example: [CH3(CH2)nCOOH] + NaOH = [CH3(CH2)nCOONa]+H2O.
  • Applications of Stearates are used as acid scavengers, lubricants and release agents by the plastics industry.

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