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Preparation process of calcium carbonate

A preparation process and technology of calcium carbonate, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of low purity, low yield and low quality of calcium carbonate, and achieve high product purity, high yield and high quality. Effect

Inactive Publication Date: 2018-07-24
江西九峰纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, it is necessary to provide a preparation process of calcium carbonate to solve the problems of low purity, low yield, low quality and high energy consumption of calcium carbonate in the prior art

Method used

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  • Preparation process of calcium carbonate

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Embodiment 1

[0028] The preparation technology of the calcium carbonate of the present embodiment, comprises the following steps:

[0029] (1) adding calcium nitrate to deionized water, dissolving and preparing a calcium nitrate solution with a mass fraction of 40%;

[0030] (2) Add ammonia water to the calcium nitrate solution at a temperature of 60° C., and add calcium hydroxide under strong alkaline pH conditions, stir evenly, let stand for 2 hours, and filter to obtain a refined solution;

[0031] (3) Ultrasonic atomize the refined solution into a refined atomized product, and pass the refined atomized product into the carbonization tower, then add ammonium bicarbonate to carry out carbonization reaction, control the carbonization temperature to 70 ° C, and the reaction time is 4 hours to obtain the intermediate product calcium carbonate materials;

[0032] (4) Add deionized calcium carbonate material to the intermediate product and heat it to 75°C, then add it into a stainless steel ...

Embodiment 2

[0042] The preparation technology of the calcium carbonate of the present embodiment, comprises the following steps:

[0043] (1) adding calcium nitrate to deionized water, dissolving and preparing a calcium nitrate solution with a mass fraction of 60%;

[0044] (2) Add ammonia water to the calcium nitrate solution at a temperature of 80° C., and ensure that the pH is strongly alkaline, add calcium hydroxide, stir evenly, let stand for 4 hours, and filter to obtain a refined solution;

[0045] (3) Ultrasonic atomize the refined solution into a refined atomized product, and pass the refined atomized product into the carbonization tower, then add ammonium bicarbonate to carry out carbonization reaction, control the carbonization temperature to 80 ° C, and the reaction time is 6 hours to obtain the intermediate product calcium carbonate materials;

[0046] (4) Add deionized calcium carbonate material to the intermediate product and heat it to 85°C, then put it into a stainless s...

Embodiment 3

[0056] The preparation technology of the calcium carbonate of the present embodiment, comprises the following steps:

[0057] (1) adding calcium nitrate to deionized water, dissolving and preparing a calcium nitrate solution with a mass fraction of 50%;

[0058] (2) Add ammonia water to the calcium nitrate solution under the temperature condition of 70° C., under the condition of ensuring pH strong alkalinity, add calcium hydroxide, stir evenly, let stand for 3 hours, and filter to obtain the refined solution;

[0059] (3) Ultrasonic atomize the refined solution into a refined atomized product, and pass the refined atomized product into the carbonization tower, then add ammonium bicarbonate to carry out carbonization reaction, control the carbonization temperature to 75 ° C, and the reaction time is 5 hours to obtain the intermediate product calcium carbonate materials;

[0060] (4) Add deionized calcium carbonate material to the intermediate product and heat it to 80°C, then...

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Abstract

The invention discloses a preparation process of calcium carbonate. The preparation process comprises the following steps: (1) adding calcium nitrate into deionized water, and preparing calcium nitrate solution with the mass fraction being 40-60%; (2) adding ammonia water into the calcium nitrate solution, adding calcium hydroxide, and stirring uniformly, thus obtaining refined liquid; (3) ultrasonically atomizing the refined liquid into refined an atomized matter, introducing the refined atomized matter into a carbonization tower, and then adding ammonium hydrogen carbonate to carry out carbonization reaction, thus obtaining an intermediate product, i.e., a calcium carbonate material; (4) after adding the intermediate product (calcium carbonate material) into the deionized water, heating,then adding into a stainless-steel spherical container, placing the spherical container on a grinder, and starting the grinder; (5) carrying out solid-liquid separation on feed liquid obtained in thestep (4), and drying and roasting obtained solid to obtain the calcium carbonate. The preparation process of the calcium carbonate disclosed by the invention has the beneficial effects that the calcium carbonate prepared by the process is high in purity, yield and quality, and energy consumption is low.

Description

technical field [0001] The invention relates to the technical field of inorganic chemical industry, in particular to a preparation process of calcium carbonate. Background technique [0002] Calcium carbonate is the most widely used inorganic filler in polymer composite materials. Adding an appropriate amount of inorganic filler in rubber and plastic processing can improve the rigidity, wear resistance, hardness, heat resistance, and dimensional stability of the product. In recent years, with the rapid development of science and technology, the requirements for calcium carbonate in various industries are becoming more and more high-quality, high-purity, and high-yield. Therefore, how to prepare high-quality, high-purity, high-yield calcium carbonate , to meet market demand, has become an imminent problem. [0003] After searching the prior art, it was found that Chinese invention patent application 201410317369.5 (public date: December 16, 2015) discloses a preparation meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
Inventor 黄荣庄慧平
Owner 江西九峰纳米科技有限公司
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