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Preparation method of rod-like calcite type calcium carbonate crystals

A calcite type, calcium carbonate technology, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of complex preparation methods, poor control of grain size, and high price, and achieve simple preparation methods, low prices, and wide sources of raw materials Effect

Inactive Publication Date: 2013-08-21
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problems that the current preparation method of rod-shaped calcium carbonate is complicated, the price is high and the grain size is difficult to control, thereby providing a preparation method of rod-shaped calcite-type calcium carbonate crystals

Method used

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  • Preparation method of rod-like calcite type calcium carbonate crystals
  • Preparation method of rod-like calcite type calcium carbonate crystals
  • Preparation method of rod-like calcite type calcium carbonate crystals

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specific Embodiment approach 1

[0024] The specific embodiment one: the preparation method of a kind of rod-shaped calcite type calcium carbonate crystal is carried out in the following steps in the present embodiment:

[0025] 1. Add Ca(OH) 2 It is configured into an aqueous solution with a mass concentration of 6% to 10%, and then placed in a constant temperature water bath at 20°C to 60°C, at 50r·min -1 ~300r·min -1 While stirring at 0.2L·min -1 ~0.8L·min -1 into CO at a rate of 2 Gas for 10min to 20min to obtain a mixed solution;

[0026] 2. First configure PASP into a PASP aqueous solution with a mass concentration of 4%, and then add it to the mixed solution obtained in step 1. After reacting for 1.5h to 2h, stop feeding CO 2 , the gas gets a suspension;

[0027] 3. Wash the suspension obtained in step 2 with deionized water for 2 to 4 times, and then wash with absolute ethanol for 2 to 4 times. Dry under vacuum for 12h to 36h to obtain calcium carbonate crystals.

[0028] The rod-shaped calcit...

specific Embodiment approach 2

[0032] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, Ca(OH) 2 The mass concentration of the solution is 7%-9%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0033] Embodiment 3: This embodiment is different from Embodiment 1 to Embodiment 2 in that: the temperature of the water bath in step 1 is 25°C-45°C. Others are the same as one of the specific embodiments 1 to 2.

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Abstract

The invention discloses a preparation method of rod-like calcite type calcium carbonate crystals, relating to a preparation method for calcium carbonate crystals and aiming at solving the technical problems that an existing preparation method of the rod-like calcite type calcium carbonate crystals is complicated, and high in cost, and the sizes of crystal particles cannot be well controlled. The preparation method disclosed by the invention comprises the steps of: I. placing a Ca(OH)2 solution into a thermostatic water bath cauldron, and introducing CO2 gas under the stirring condition; II. adding a PASP (Sodium of Polyaspartic Acid) solution with certain concentration into the solution, reacting for certain time, and then stopping the introduction of the CO2 gas; and III. washing the obtain samples respectively with deionized water and absolute ethyl alcohol, leaching, and carrying out vacuum drying for certain time under certain thermostatic condition to obtain the calcium carbonate crystals. The rod-like calcite type calcium carbonate crystals can be produced into plastics absorbed by the environment when being applied to plastic materials.

Description

technical field [0001] The invention relates to a preparation method of calcium carbonate crystals. Background technique [0002] Calcium carbonate is an important biomineral and an environmentally friendly material, which widely exists in organisms, and its strength can be 1000 to 3000 times higher than that of a single mineral crystal, as well as special optical properties, mechanical properties and strong Tear resistance, etc. Moreover, calcium carbonate has a wide range of sources, low price, non-toxic, tasteless, large filling capacity and many other advantages. Therefore, calcium carbonate has a wide range of applications in the industrial field, and is currently mainly used in industries such as rubber, ink, plastics, paper, paint, medicine, environmental protection, and food. [0003] In recent years, the control of the size and morphology of inorganic materials has become a key factor for the wide application of calcium carbonate. Compared with controlling the pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
Inventor 杨士林宋微
Owner HEILONGJIANG UNIV
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