Hydrophilic magnetic nano micro particle and its dispersion liquid preparing technique

Hydrophilic magnetic nano micro particle and its dispersion liquid preparing technique

  • CN 1,640,819 B
  • Filed: 09/01/2004
  • Issued: 08/31/2011
  • Est. Priority Date: 09/01/2004
  • Status: Active Grant
First Claim
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1. hydrophilic magnetic nano micro particle dispersing liquid preparation method, its process comprises that crystallization reaction control and grain surface replace and modifies:

  • with molysite and aqueous slkali in 0.1~

    120 minute, finish mix react after, add 100~

    600 times of amounts, 1~

    30 ℃

    water, 100~

    40000rpm stirred 1~

    10 hour down, finished the crystallization reaction of particle;

    After the crystalline particle separation, cleaning, adding concentration is the dressing agent of 1.0~

    5.0moL/L, replaces modification;

    Molysite be high ferro and ferrous sulfate, hydrochloride, nitrate, perchlorate any one;

    Aqueous slkali is any one of solution of NaOH, potassium hydroxide, ammoniacal liquor, tetramethylammonium hydroxide;

    Dressing agent is gluconic acid, starch, citric acid, tartaric acid, ethylenediamine tetra-acetic acid anion, hydrogen, ammonium, tetramethylammonium cation, and any one of cation, anion and non-ionic surface active agent.

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