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Method for preparing micron-grade acicular vaterite calcium carbonate

A technology of vaterite and calcium carbonate, applied in the direction of calcium carbonate/strontium/barium, etc., to achieve the effect of simple process, safe operation and low cost

Inactive Publication Date: 2016-08-24
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many organic additives have been used to synthesize calcium carbonate crystals, and many different morphologies and crystal forms have been obtained, few of them use organic molecules and methods to control the polarity of the solution to prepare calcium carbonate crystals to obtain uniform morphologies. There are reports

Method used

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  • Method for preparing micron-grade acicular vaterite calcium carbonate
  • Method for preparing micron-grade acicular vaterite calcium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] ①Take 1.0g of dodecyltrimethylammonium bromide (DTAB), add 25ml of distilled water, place at 20°C, and electromagnetically stir for 3 minutes to obtain a clear and transparent liquid A.

[0019] ②Weigh 11.2g calcium chloride (CaCl 2 ), dissolved in 80ml of distilled water, placed in an environment of 25°C, and electromagnetically stirred for 3 minutes to obtain a clear and transparent liquid B.

[0020] ③Weigh 10.6g sodium carbonate (Na 2 CO 3 ), dissolved in 80ml of distilled water, placed in an environment of 25°C, and electromagnetically stirred for 3min. A clear and transparent liquid C was obtained.

[0021] ④Measure 6ml of A and mix with 6ml of B and C solutions to obtain transparent and clear liquids D and E, and place D and E liquids at 25°C for 10 minutes with electromagnetic stirring.

[0022] ⑤ Slowly add liquid D dropwise (2d / s) into liquid E, and place the mixed liquid F at 25°C, and stir it electromagnetically for 30 minutes.

[0023] ⑥ Centrifuge the...

Embodiment 2

[0025] ①Take 1.0g of dodecyltrimethylammonium bromide (DTAB), add 25ml of distilled water, place at 20°C, and electromagnetically stir for 3 minutes to obtain a clear and transparent liquid A.

[0026] ②Weigh 11.2g calcium chloride (CaCl 2 ), dissolved in 80ml of distilled water, placed in an environment of 25°C, and electromagnetically stirred for 3 minutes to obtain a clear and transparent liquid B.

[0027] ③Weigh 10.6g sodium carbonate (Na 2 CO 3 ), dissolved in 80ml of distilled water, placed in an environment of 25°C, and electromagnetically stirred for 3min. A clear and transparent liquid C was obtained.

[0028] ④Measure 6ml of A and mix with 6ml of B and C solutions to obtain transparent and clear liquids D and E, and place D and E liquids at 25°C for 10 minutes with electromagnetic stirring.

[0029] ⑤ Slowly add liquid D dropwise (2d / s) into liquid E, and place the mixed liquid F at 25°C, and stir it electromagnetically for 5 minutes.

[0030] ⑥ Centrifuge the ...

Embodiment 3

[0032] ①Take 1.0g of dodecyltrimethylammonium bromide (DTAB), add 25ml of distilled water, place at 20°C, and electromagnetically stir for 3 minutes to obtain a clear and transparent liquid A.

[0033] ②Weigh 11.2g calcium chloride (CaCl 2 ), dissolved in 80ml of distilled water, placed in an environment of 25°C, and electromagnetically stirred for 3 minutes to obtain a clear and transparent liquid B.

[0034] ③Weigh 10.6g sodium carbonate (Na 2 CO 3 ), dissolved in 80ml of distilled water, placed in an environment of 25°C, and electromagnetically stirred for 3min. A clear and transparent liquid C was obtained.

[0035] ④Measure 6ml of A and mix with 6ml of B and C solutions to obtain transparent and clear liquids D and E, and place D and E liquids at 25°C for 10 minutes with electromagnetic stirring.

[0036] ⑤ Slowly add liquid D dropwise (2d / s) into liquid E, and place the mixed liquid F at 25°C, and stir it electromagnetically for 10 minutes.

[0037] ⑥ Centrifuge the...

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Abstract

The invention relates to a method for preparing micron-grade acicular vaterite calcium carbonate. According to the invention, wherein a chemical precipitation method is used to obtain the acicular vaterite calcium carbonate with size distribution of 15-20 micrometers at different aging times by using regulation and control of organic additives. The obtained acicular acicular vaterite calcium carbonate has relative large specific surface area. The method has characteristics of simple process, safe operation, low cost and good repeatability, and can provide high potential application value as the drug carrier in the field of medicine after the suitable scale production.

Description

technical field [0001] The invention belongs to the preparation of calcium carbonate, and relates to a preparation method of micron-sized acicular vaterite calcium carbonate. The method utilizes a simple and effective chemical precipitation method, and on the basis of precise control of experimental conditions and test parameters, micron-sized acicular vaterite calcium carbonate with uniform shape and size is obtained. Background technique [0002] Calcium Carbonate (CaCO 3 ) is the main inorganic component of limestone, which exists in large quantities in nature and is widely used in industrial production. Due to its good biological activity, it has become an important research object; calcium carbonate is a non-toxic and biocompatible material with biodegradability and suitable degradation rate, so it is widely used in pharmaceutical, biological and cosmetic industries. Has potential application prospects. Wherein the methods for preparing nanostructured calcium carbona...

Claims

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Application Information

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IPC IPC(8): C01F11/18
Inventor 储德清王澳轩孙洪明王立敏马忠超
Owner TIANJIN POLYTECHNIC UNIV
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