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Preparation method of ball-cluster-shaped light calcium carbonate

A light calcium carbonate, cluster technology, applied in the direction of calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc. Difficult to control and other problems, to achieve uniform morphology, uniform particle size distribution, and low production costs

Active Publication Date: 2018-11-13
GUANGXI SHANDONGLAI CHEM IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, calcium carbonate production is mainly faced with the difficulty of crystal shape control, wide particle size distribution of products, and different particle sizes.

Method used

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  • Preparation method of ball-cluster-shaped light calcium carbonate
  • Preparation method of ball-cluster-shaped light calcium carbonate
  • Preparation method of ball-cluster-shaped light calcium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of spherical cluster-shaped light calcium carbonate, comprising the following processing steps:

[0029] (1) Calcining quicklime at 1100°C for 5 hours to turn quicklime into quicklime, then digest quicklime and water at a mass ratio of 1:8 to obtain lime slurry. After 24 hours, pass through a 150-mesh sieve to remove impurities, and then dilute the lime slurry to a solid content of 13% to obtain Ca(OH) 2 suspension;

[0030] (2) In the Ca(OH) obtained in step (1) Adding the first crystal form regulator and the second crystal form regulator with a mass ratio of 2:1 to the Ca(OH) suspension, stirring for 30min at a rotating speed of 500r / min, Obtain a mixed suspension; the total addition of the crystal form regulator is Ca(OH) 1% of the suspension quality, and the first crystal form regulator is a dodecyl phosphate triethanolamine solution with a mass concentration of 5%. , the second crystal form regulator is a sodium N-lauroyl amate solution with ...

Embodiment 2

[0035] A preparation method of spherical cluster-shaped light calcium carbonate, comprising the following processing steps:

[0036] (1) Calcining quicklime at 1200°C for 4 hours to turn quicklime into quicklime, then digest quicklime and water at a mass ratio of 1:7 to obtain lime slurry. After 24 hours, pass through a 150-mesh sieve to remove impurities, and then dilute the lime slurry to a solid content of 11.5% to obtain Ca(OH) 2 suspension;

[0037] (2) In the Ca(OH) obtained in step (1) Adding the first crystal form regulator and the second crystal form regulator with a mass ratio of 2:1 to the Ca(OH) suspension, stirring at a rotating speed of 500r / min for 25min, Obtain a mixed suspension; the total addition of the crystal form regulator is Ca(OH) 5% of the suspension quality, the first crystal form regulator is a dodecyl phosphate salt solution with a mass concentration of 5%, The second crystal form regulator is sodium N-lauroylcobalamin solution with a mass concent...

Embodiment 3

[0042] A preparation method of spherical cluster-shaped light calcium carbonate, comprising the following processing steps:

[0043] (1) Calcining quicklime at 1300°C for 4 hours to turn quicklime into quicklime, then digest quicklime and water at a mass ratio of 1:7 to obtain lime slurry. After 48 hours, pass through a 150-mesh sieve to remove impurities, and then dilute the lime slurry to a solid content of 12.5% ​​to obtain Ca(OH) 2 suspension;

[0044] (2) In the Ca(OH) obtained in step (1) Adding the first crystal form regulator and the second crystal form regulator with a mass ratio of 2:1 to the Ca(OH) suspension, stirring for 20min at a rotating speed of 800r / min, Obtain a mixed suspension; the total addition of the crystal form regulator is Ca(OH) 3% of the suspension quality, the first crystal form regulator is a cetyl glucoside solution with a mass concentration of 5%, and the second The dimorph regulator is sodium N-lauroylcobalamin solution with a mass concentra...

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Abstract

The invention discloses a preparation method of ball-cluster-shaped light calcium carbonate. The preparation method comprises the following steps: calcining quick lime to generate slaked lime; carrying out digestion reaction on the slaked lime and water to obtain lime slurry; ageing, sieving, removing impurities and diluting until the solid content is 10 to 13 percent, so as to obtain a Ca(OH)2 suspension solution; then adding a first crystal form regulation and control agent and a second crystal form regulation and control agent; stirring and uniformly mixing to obtain a mixed suspension solution, wherein the first crystal form regulation and control agent is one or more of dodecyl phosphate triethanolamine, dodecyl phosphate and hexadecyl glucoside and the second crystal form regulationand control agent is one or more of sodium N-lauroylsarcosinate, sodium N-lauroylglutamate and polysorbate; introducing carbon dioxide gas into the mixed suspension solution and carrying out carbonization reaction; when the PH (Potential of Hydrogen) value of the slurry is reduced to 7.0 to 7.5, stopping reaction; then dehydrating, drying, crushing and sieving to obtain a calcium carbonate product. According to the preparation method, the ball-cluster-shaped light calcium carbonate with a uniform shape and good dispersity is prepared and calcium carbonate with different shapes are explored; the preparation method has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of calcium carbonate preparation, in particular to a method for preparing spherical cluster-shaped light calcium carbonate. Background technique [0002] Calcium carbonate is an important industrial filler. It is widely used in plastics, rubber, paper, ink, coatings and other industries due to its advantages of wide sources, low price, non-toxic safety, and large filling capacity. Calcium carbonate mainly has three different crystal forms: vaterite, calcite, and aragonite. According to its synthesis process, additive type and addition amount, etc., the final calcium carbonate will present different shapes such as spindle, needle, cube, sheet, and chain. Calcium carbonate with different crystal forms and shapes has different material properties and uses. By controlling the synthesis process and using different additives, calcium carbonate with controllable shape, size and structure can be prepared. [0003...

Claims

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Application Information

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IPC IPC(8): C01F11/18
CPCC01F11/183
Inventor 满治成朱勇莫桂英黎宇平杨爱梅
Owner GUANGXI SHANDONGLAI CHEM IND TECH CO LTD
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