Preparation method of enhanced multiphase crystal based on calcite and aragonite

Abstract

The invention discloses a preparation method of an enhanced multiphase crystal based on calcite and aragonite. The preparation method mainly solves the problems that in the prior art, a calcium carbonate preparation method is complicated, expensive and not easy to control whiteness. The preparation method comprises the steps of firstly mixing calcium chloride, magnesium chloride, sodium carbonate and sodium hydroxide with deionized water so as to prepare into solutions; then mixing the calcium chloride solution, the sodium carbonate suspension liquid and the sodium hydroxide suspension liquid, heating, and stirring to prepare into a calcite and aragonite multiphase suspension liquid; adding a magnesium chloride water solution into the calcite and aragonite multiphase suspension liquid, and preparing into the enhanced multiphase crystal based on calcite and aragonite; precipitating, cleaning, drying, and grinding to obtain lamellar crystals with the thickness being 0.05 to 0.1 micrometer, the diameter being 0.2 to 4 micrometers and uniform size distribution. According to the preparation method of the enhanced multiphase crystal based on calcite and aragonite provided by the invention, the whiteness of the crystal is improved, the used raw materials are cheap, the process is simple, and the enhanced multiphase crystal can be applied in manufacturing plastics, rubbers, catalysts, medicines, ceramics, papermaking, ink and coatings.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, and in particular relates to a preparation method of enhanced multiphase crystals, which can be used in the manufacture of plastics, rubber, catalysis, medicine, pottery, cosmetics, papermaking, ink and paint. Background technique [0002] my country is a big country of plastic production and consumption. Liu Yingjun pointed out in the article "Calcium Carbonate Deep Processing and Its Application in Plastics" published in the "2011 Modified Plastic Hotspot Technology and Product Forum" in 2012 that 250 million plastics are produced every year in the world. Among the total amount of plastic products per ton, my country's total plastic products have exceeded 80 million tons. In the near future, it will surpass the United States and become the world's largest producer and consumer. Adding inorganic mineral powder materials to plastics can play an important role in reducing raw material co...

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Problems solved by technology

[0009] The patent with the notification number CN105836782 discloses a calcite-type calcium carbonate and a preparation method thereof. The method uses carbonates, silicates and calcium salts as raw materials and needs to be carried out at a pH of 10 to 13. This is a strong Alkaline environment requirements will bring strong corrosion to the equipment; in addition, the use of silicate is easy to bring in more impurity ions, and it is not easy to control the whiteness of calcium carbonate powder

[0010] The patent with the notification number CN103086414A discloses a method for preparing high-purity calcite calcium carbonate micropowder by hydrothermal treatment of shells. This method needs to be carried out in an autoclave, which brings danger and complexity to the process; and the natural shells used are easy to Bring in more impurity ions, it is not easy to control the whiteness of calcium carbonate powder

[0011] The patent with the notification number CN103773082A discloses a preparation method of magnesium hydroxide-coated calcium carbonate inorganic composite flame-retardant filler. The method uses natural carbonate as raw material to produce the above-mentioned calcium carbonate by calcining → digestion → impurity removal → carbonization process, The process is complicated and it is easy to bring in impurities, which will affect the whiteness of the obtained powder

[0012] 2. The preparation cost of calcium carbonate powder is high and the synthesis process is complex

[0014] The patent with the notification number CN106564923A discloses a method for preparing rod-shaped calcite-type calcium carbonate crystals. The entire experimental process of this method requires the introduction of CO 2 Gas, which brings complexity to the process, and the use of methylimidazole, etc. increases the cost

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