A kind of preparation method of core-shell structure high white precipitated calcium carbonate
A technology of precipitated calcium carbonate and core-shell structure, applied in the direction of calcium carbonate/strontium/barium, etc., can solve problems such as failure to achieve ideal application effects, polluted products, whiteness failure, etc., achieve enhanced coating effect, low cost, The effect of permanent whiteness maintenance
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Examples
Embodiment 1
[0031] A preparation method of high-white precipitated calcium carbonate with core-shell structure, comprising the following steps,
[0032] Step 1. Digest the quicklime with a whiteness of 90 and digested water at 50°C in a ratio of 1:9 by mass, and carry out the digestion reaction. After the reaction is completed, sieve it through a 320-mesh vibrating sieve. After sieving, use a three-stage The suspension separator removes impurities to obtain low-whiteness calcium hydroxide seminal pulp, and ages the seminal pulp for 40 hours;
[0033] Step 2: Mix quicklime with a whiteness of 96 and digested water at 50°C in a ratio of 1:9 by mass, then carry out the digestion reaction. After the reaction is completed, sieve through a 320-mesh vibrating sieve, and use a third-stage The suspension separator removes impurities to obtain high-whiteness calcium hydroxide seminal pulp, and ages the seminal pulp for 40 hours;
[0034] Step 3: Add an appropriate amount of water to the aged low-w...
Embodiment 2
[0040] A preparation method of high-white precipitated calcium carbonate with core-shell structure, comprising the following steps,
[0041] Step 1. Digest the quicklime with a whiteness of 86 and digested water at 45°C in a mass ratio of 1:8, and carry out the digestion reaction. After the reaction is completed, sieve through a 250-mesh vibrating sieve. After sieving, use a three-stage The suspension separator removes impurities to obtain low-whiteness calcium hydroxide seminal pulp, and ages the seminal pulp for 36 hours;
[0042] Step 2: Mix quicklime with a whiteness of 95 and digested water at 45°C in a ratio of 1:8 by mass, and carry out digestion reaction. After the reaction is completed, sieve through a 250-mesh vibrating sieve, and use a third-stage The suspension separator removes impurities to obtain high-whiteness calcium hydroxide seminal pulp, and ages the seminal pulp for 36 hours;
[0043] Step 3, adding an appropriate amount of water to the aged low-whiteness...
Embodiment 3
[0049] A preparation method of high-white precipitated calcium carbonate with core-shell structure, comprising the following steps,
[0050] Step 1. Digest the quicklime with a whiteness of 88 and digested water at 40°C in a mass ratio of 1:10, and carry out the digestion reaction. After the reaction is completed, sieve through a 200-mesh vibrating sieve. After sieving, use a three-stage The suspension separator removes impurities to obtain low-whiteness calcium hydroxide seminal pulp, and ages the seminal pulp for 38 hours;
[0051] Step 2: Digest the quicklime with a whiteness of 97 and digested water at 40°C in a ratio of 1:10 by mass, and carry out the digestion reaction. After the reaction is completed, sieve through a 200-mesh vibrating sieve. After sieving, use a three-stage The suspension separator removes impurities to obtain high-whiteness calcium hydroxide seminal pulp, and ages the seminal pulp for 38 hours;
[0052] Step 3, adding an appropriate amount of water t...
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Abstract
Description
Claims
Application Information
- IPC
- C08K9/06; C08K9/04; C08K3/26; C08K9/10; C08L27/06; C01F11/18
- Inventors
- 杜年军; 孙勇峰