Method for preparing ammonium substituted cage model sesquialter oxosilane by using chaff ash

Method for preparing ammonium substituted cage model sesquialter oxosilane by using chaff ash

  • CN 101,139,356 A
  • Filed: 10/11/2007
  • Published: 03/12/2008
  • Est. Priority Date: 10/11/2007
  • Status: Active Application
First Claim
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1. a method of utilizing rice husk ash to prepare tetramethyl-ammonium substituted cage model sesquialter siloxanes is characterized in that comprising the steps:

  • (1) with impurity such as shrivelled kernel in the rice husk washing taking-up husk and earth, dry, remove moisture, the exsiccant rice husk is become rice husk ash again, it is stand-by to put into moisture eliminator then;

    (2), add ground in advance rice husk ash, stirring reaction 20~

    25h under 25~

    30 ℃

    of temperature condition again with the dissolving of catalyzer Tetramethylammonium hydroxide solubilizing agent;

    Be warming up to 60~

    70 ℃

    then, reaction 5~

    8h;

    (3) with step (2) products therefrom suction filtration, utilize water distilling apparatus from filtrate, to steam partial solvent, product can not precipitated with flocculent substance, place 3~

    10 ℃

    of coolings of refrigerator, produce a large amount of crystal two days later, take out crystal, suction filtration, clean with acetone then, crystal in 50~

    70 ℃

    of freeze-day with constant temperature 24~

    48 hours, is promptly obtained target product tetramethyl-ammonium substituted silsesquioxane.

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