Preparation method of morphology controllable calcium carbonate based on temperature control

A temperature control, calcium carbonate technology, applied in the direction of calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc., can solve the problem of increasing production costs, increasing the complexity of the process, and increasing the risk of calcium carbonate production and other problems, to achieve the effect of less restrictions, lower production costs, and uniform size

Active Publication Date: 2015-06-10
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the existing research on the control of calcium carbonate properties, especially the method of crystal form and shape control, starts with the addition of crystal form control agents (Wang Yong, Zhao Fengyun, Hu Yongqi, etc. Crystal form control agents affect the crystal form and form of precipitated calcium carbonate. Influence[J]. Inorganic Salt Industry, 2006,38(3):5-8.), and crystal form control agents require a wide variety, including specific types of inorganic / organic acids, inorganic salts, alcohols, amino acids, proteins, Sugars and surfactant polymers, etc.; and due to the addition of crystal form control agents, the elution of the control agent and the repurification of the product are required before the final product is obtained, which increases the complexity of the process; in addition, the crystal form control agent Also increased the production cost, the control agent is used as a chemical reagent, its stability and reliability all can increase the risk to the production of calcium carbonate

Method used

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  • Preparation method of morphology controllable calcium carbonate based on temperature control
  • Preparation method of morphology controllable calcium carbonate based on temperature control
  • Preparation method of morphology controllable calcium carbonate based on temperature control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1) Add CaCl 2 Dissolve in water to prepare 0.1mol / L CaCl 2 solution;

[0041] 2) Na 2 CO 3 (or K 2 CO 3) dissolved in water to prepare 0.1mol / L Na 2 CO 3 (or K 2 CO 3 ) solution;

[0042] 3) Place the two solutions in a water bath at 15°C for 10-30 minutes;

[0043] 4) The two solutions were mixed and stirred for more than 3 minutes without adding any other reagents, and the precipitated product was harvested and dried at room temperature to obtain spherical micron-sized calcium carbonate vaterite crystals (such as figure 1 ).

Embodiment 2

[0045] 1) Add CaCl 2 Dissolve in water to prepare 0.1mol / L CaCl 2 solution;

[0046] 2) Na 2 CO 3 (or K 2 CO 3 ) dissolved in water to prepare 0.1mol / L Na 2 CO 3 (or K 2 CO 3 ) solution;

[0047] 3) Place the two solutions in a water bath at 35°C for 10-30 minutes;

[0048] 4) The two solutions were mixed and stirred for more than 3 minutes without adding any other reagents, and the precipitated product was harvested and dried at room temperature to obtain cubic micron-sized calcium carbonate calcite crystals (such as figure 2 ).

Embodiment 3

[0050] 1) Add CaCl 2 Dissolve in water to prepare 0.1mol / L CaCl 2 solution;

[0051] 2) Na 2 CO 3 (or K 2 CO 3 ) dissolved in water to prepare 0.1mol / L Na 2 CO 3 (or K 2 CO 3 ) solution;

[0052] 3) Place the two solutions in a water bath at 55°C for 10-30 minutes;

[0053] 4) The two solutions were mixed and stirred for more than 3 minutes without adding any other reagents, and the precipitated product was harvested and dried at room temperature to obtain chrysanthemum-shaped micron-sized calcium carbonate aragonite crystals (such as image 3 ).

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Abstract

The invention relates to a preparation method of morphology controllable calcium carbonate based on temperature control. The preparation method of the morphology controllable calcium carbonate based on the temperature control comprises the following steps: introducing a solution containing carbonate or gas such as CO2 which can generate carbonate or a gas mixture containing CO2 into a solution containing calcium ions at the temperature of 10-100 DEG C, initiating precipitation reaction, obtaining a precipitate mixture several minutes later, and drying at room temperature, so that micron-sized calcium carbonate crystals with specific morphology are obtained. The calcium carbonate obtained by adopting the preparation method is good in correspondence between morphology and reaction temperature, and the correspondence is independent of type of a reactant; the obtained calcium carbonate crystals are well dispersed and uniform in sized; meanwhile, control of crystal form is efficient and stable; besides, by adopting a temperature control process, one-step synthesis, simplicity and practicability are realized, and industrial cost is low, so that the preparation method of the morphology controllable calcium carbonate based on the temperature control can be widely applied to batch preparation of calcium carbonate in different morphologies.

Description

technical field [0001] The invention relates to a controllable preparation of calcium carbonate with different shapes, in particular to a method for the controllable preparation of calcium carbonate shape based on temperature control. Background technique [0002] Calcium carbonate is currently the most widely used chemical product. As an additive with excellent performance, it is used in the fields of rubber, paper, textile, paint, plastic, toothpaste, food and medicine to improve the overall performance of the product (Hu Qingfu, Hu Xiaobo, Song Liying. Analysis on the development of calcium carbonate industry [J]. Inorganic Salt Industry, 1999, 31(5): 18-21.). Calcium carbonate includes three crystal forms of calcite, aragonite and vaterite, and the forms include cubic, spindle, spherical, needle, flake, chain and amorphous, etc. Calcium carbonate products with different crystal forms and forms have different functions and functions. The application fields are different....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
CPCC01F11/181C01P2004/03
Inventor 韩永生李展汪涵李静海
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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