Method for preparing nanometer chromium dioxide

Method for preparing nanometer chromium dioxide

  • CN 101,684,002 B
  • Filed: 09/23/2008
  • Issued: 11/06/2013
  • Est. Priority Date: 09/23/2008
  • Status: Active Grant
First Claim
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1. a method for preparing nanometer chromium dioxide, is characterized in that reaction raw materials is chromium hydroxide hydrate, oxygen, water;

  • Reaction environment is oxygen atmosphere, and concrete preparation process is as follows;

    1) at first the chromium hydroxide hydrate is pulverized;

    2) the chromium hydroxide hydrate after pulverizing is packed in the high-temperature high-voltage reaction device;

    3) be that 0.001~

    5 ratio adds entry according to water/chromium hydroxide hydrate w/w;

    4) pass into the oxygen that the original pressure scope is 0.001~

    7MPa;

    5) sealing;

    6) be warmed up to 350~

    390 ℃

    , the reaction times is less than 60min;

    7) after reaction finishes, reactor is cooled to room temperature and Exhaust Gas, take out afterwards product.

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