Method for preparing modified micro granules
A particle and modification technology, applied in the field of preparation of modified micronized particles, can solve the problems of loss of micronized particles, difficulty in re-modification, small particles, etc., and achieve the effects of low cost, rich application performance and flexible application.
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[0026] A method for preparing modified micronized particles invented by this patent is characterized in that: adding a purifying agent to the mixed precipitate, converting the inorganic precipitate or its precursor part into water-soluble substances for removal, and carrying out the remaining precipitate Wash and concentrate.
[0027] A method for preparing modified micronized particles invented by this patent is characterized in that: adding a purifying agent to the mixed precipitate, converting all the inorganic precipitate or its precursors into water-soluble substances for removal, and carrying out the remaining precipitate Wash and concentrate.
[0028] A method for preparing modified micronized particles invented by this patent is characterized in that it further includes: mixing / reacting the purified mixed precipitate with a surface modifier to obtain modified micronized particles.
[0029] A preparation method of modified micronized particles invented by this patent...
Embodiment 1
[0080] At room temperature of 25°C, add 10 ml of 0.1 mol / L calcium chloride aqueous solution into a 50 ml beaker, put a magnetic rotor coated with polytetrafluoroethylene, and place the SH05-3 constant temperature magnetic stirrer (Shanghai Minhang Hongpu Instrument Co., Ltd. Factory) adjust the speed to the maximum. Then add 5 ml of 0.1 mol / L sodium carbonate and 0.2 mol / L sodium hydroxide solution dropwise from above the center of the vortex formed by the magnetic rotor within 1 minute. After the dropwise addition is completed, stir for about 1 hour and then start static aging.
[0081]After ten hours, the suspension containing precipitates of calcium carbonate and calcium hydroxide was filtered. The resulting filter cake was placed in a 50 ml beaker. Start the magnetic stirrer, and slowly add 8 ml of 0.1 mol / L hydrochloric acid aqueous solution under vigorous stirring. After 30 minutes, filter again, then stir and wash with about 10 ml of water, then filter again, and wa...
Embodiment 2
[0085] Repeat the same experiment as in Example 1, with the calcium carbonate of gained: dispersed in 30 milliliters of liquid paraffin containing 0.1% oleic acid; dispersed in 30 milliliters of aqueous solution containing 0.1% oleic acid and 0.1% penetrant JFC; dispersed In 30 ml aqueous solution containing 0.1% anionic organic dye fluorescent yellow and 0.1% non-ionic surfactant penetrating agent JFC; dispersed in a pure acrylic emulsion called AT-150 with 3% acrylic group (Zhongshan An Deshi Chemical Co., Ltd.).
[0086] Calcium carbonate in the above liquid can be well dispersed, and the deagglomeration effect of calcium carbonate is basically the same as that of Example 1.
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