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Preparation method of modified nano calcium carbonate

A nano-calcium carbonate, modified technology, applied in the direction of calcium carbonate/strontium/barium, nanotechnology, chemical instruments and methods, etc., can solve the unfavorable production efficiency and yield of nano-calcium carbonate, the failure of nano-calcium carbonate production, and the large number of preparation equipment and other issues, to achieve the effect of improving production efficiency and production quality standards, reducing preparation equipment, and improving purity

Pending Publication Date: 2021-12-31
江西华明纳米碳酸钙有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the above-mentioned prior art has the following defects: the method is complicated in flow, requires more preparation equipment, and has higher requirements for chemical workers. If errors occur in the preparation process, the production of nano-calcium carbonate will fail, resulting in Waste, not conducive to improving the production efficiency and output of nano-calcium carbonate

Method used

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  • Preparation method of modified nano calcium carbonate
  • Preparation method of modified nano calcium carbonate
  • Preparation method of modified nano calcium carbonate

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A kind of preparation method of modified nanometer calcium carbonate that the present invention proposes, comprises the following steps:

[0033] S1. Quicklime and water are mixed in proportion, and a chelating agent is added to react to prepare lime slurry. The lime slurry is shaken, and the solid particle content of the lime slurry is adjusted to 10%;

[0034] S2, preparing a modifier; preparing vinyltriethoxysilane, phosphoric acid ester and deionized water according to the ratio of 6:1:3 to form an ionic surfactant;

[0035] S3, adding the ionic surfactant prepared in S2 into the lime slurry prepared in S1, and shaking the mixed solution;

[0036] S4, the mixed solution that the S3 shock finishes is left standstill, and carbon dioxide is added in the solution after standing, and the solution is gasified, thereby preparing nano-calcium carbonate suspension;

[0037] S5. Drying the nano-calcium carbonate suspension, grinding and filtering the dried particles, and obt...

Embodiment 2

[0039] A kind of preparation method of modified nanometer calcium carbonate that the present invention proposes, comprises the following steps:

[0040] S1. Utilize unslaked lime and water to mix in proportion, add chelating agent, react and prepare lime slurry, shake the lime slurry, and adjust the solid particle content of the lime slurry to 12%;

[0041] S2, preparing a modifier; preparing vinyltriethoxysilane, phosphoric acid ester and deionized water according to the ratio of 4:3:3 to form an ionic surfactant;

[0042] S3, adding the ionic surfactant prepared in S2 into the lime slurry prepared in S1, and shaking the mixed solution;

[0043] S4, the mixed solution that the S3 shock finishes is left standstill, and carbon dioxide is added in the solution after standing, and the solution is gasified, thereby preparing nano-calcium carbonate suspension;

[0044] S5. Drying the nano-calcium carbonate suspension, grinding and filtering the dried particles, and obtaining nano-...

Embodiment 3

[0046] A kind of preparation method of modified nanometer calcium carbonate that the present invention proposes, comprises the following steps:

[0047] S1, using quicklime and water to mix in proportion, adding a chelating agent, reacting to prepare lime slurry, shaking the lime slurry, and adjusting the solid particle content of the lime slurry to 15%;

[0048]S2, preparing a modifier; preparing vinyltriethoxysilane, phosphoric acid ester and deionized water according to the ratio of 7:2:1 to form an ionic surfactant;

[0049] S3, adding the ionic surfactant prepared in S2 into the lime slurry prepared in S1, and shaking the mixed solution;

[0050] S4, the mixed solution that the S3 shock finishes is left standstill, and carbon dioxide is added in the solution after standing, and the solution is gasified, thereby preparing nano-calcium carbonate suspension;

[0051] S5. Drying the nano-calcium carbonate suspension, grinding and filtering the dried particles, and obtaining ...

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Abstract

The invention relates to the technical field of calcium carbonate production, and especially relates to a preparation method of modified nano calcium carbonate. The preparation method comprises the following steps: mixing quick lime and water in proportion, adding a chelating agent, reacting to obtain lime slurry, oscillating the lime slurry, and adjusting the solid particle content of the lime slurry to 10-15%; preparing a modifier; preparing an ionic surfactant from vinyltriethoxysilane, phosphate and deionized water according to a ratio of 6: 1: 3; standing, adding carbon dioxide into the solution after standing is completed to gasify the solution so as to prepare a nano calcium carbonate suspension liquid; and drying in vacuum to obtain the nano calcium carbonate. By arranging whole operation equipment, the process flow of the method is improved, the required preparation equipment is reduced, the operation requirement on the chemical worker during the preparation of the modified nano calcium carbonate is reduced, and the whole yield of the modified nano calcium carbonate production is improved.

Description

technical field [0001] The invention relates to the technical field of calcium carbonate production, in particular to a preparation method of modified nanometer calcium carbonate. Background technique [0002] The invention with the application number CN202010347297.4 discloses a preparation method of modified nano-calcium carbonate, which first mixes quicklime and water in proportion, then adds EDTA and continues to stir through a 150-200 mesh sieve, then filters and removes slag, and obtains Lime slurry for later use; then mix tannic acid and deionized water to obtain solution A, add polyvinyl alcohol to solution A under stirring conditions and heat to obtain hydrogel; then mix lime slurry and hydrogel to obtain mixed Liquid B, add carbon dioxide to the mixed liquid B for carbonization reaction, then heat the mixed liquid B to a constant temperature of 50-60°C, then add stearic acid, urea and starch to the mixed liquid B, stir and mix for 2-5 hours, filter and dry to obtai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18B82Y40/00
CPCC01F11/183B82Y40/00
Inventor 赵小英
Owner 江西华明纳米碳酸钙有限公司
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