Process for polyvinyl alcohol embedding preparation of spherical bentonite

Process for polyvinyl alcohol embedding preparation of spherical bentonite

  • CN 1,883,787 A
  • Filed: 05/19/2006
  • Published: 12/27/2006
  • Est. Priority Date: 05/19/2006
  • Status: Active Application
First Claim
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1. process for polyvinyl alcohol embedding preparation of spherical bentonite, it is characterized in that:

  • the step of method is as follows;

    (1) quaternary cationics is soluble in water, add natural montmorillonite, the quaternary cationics consumption is 50~

    200% of a bentonite cation exchange capacity, under 20~

    30 ℃

    of temperature, stir 1.5~

    4h, washing, filtration, oven dry, under 90~

    110 ℃

    of temperature, activate 30~

    60min, ground 100 mesh sieves, promptly make organobentonite;

    (2) be that 7;

    50~

    9;

    50 above-mentioned organobentonite mixes with 10% poly-vinyl alcohol solution that contains 0.02~

    0.2% sodium alginate with mass volume ratio, stir 30~

    90min, it is mixed;

    (3) with the separatory funnel of band liquid-transfering gun head said mixture is added drop-wise to and carries out cross-linking reaction in the crosslinking agent, crosslinking agent is the saturated BAS that contains 2% calcium chloride, and uses Na 2CO 3Solution is regulated pH to 6.3~

    6.7, drips while stirring, and is clean with distilled water flushing behind cross-linking reaction 1~

    12h, 50~

    70 ℃

    of oven dry down, makes the spherical bentonite through the PVA embedding.

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