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A kind of preparation method of nano calcium hydroxide

A calcium hydroxide and nanotechnology, applied in the direction of nanotechnology, nanotechnology, calcium/strontium/barium oxide/hydroxide, etc., can solve the problems of long process flow and partial carbonization of products, and achieve simple equipment and process conditions , good dispersibility and easy access to raw materials

Inactive Publication Date: 2017-02-15
杨富巍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preparing nano calcium hydroxide, which can solve the problems of long process flow, by-product soluble salt and partial carbonization of the product in the existing method for preparing nano calcium hydroxide based on soluble salt-alkaline solution metathesis reaction, Improve the purity of calcium hydroxide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1, a preparation method of nano-calcium hydroxide, mixing and stirring unslaked lime, methanol, water according to the mass ratio of 1:1:1 to make a suspension evenly, and then placing the suspension in an ultrasonic reactor (Beijing Xiang Hu, XH300B), the ultrasonic power density of the ultrasonic reactor is within 0.5-5.0 kW / L, which has the best particle size effect, and the effect will decrease if it exceeds this range. In this embodiment, the ultrasonic power of 0.5 kW / L is selected. Digestion reaction under density for 2 hours, the product is separated by solid-liquid centrifugation and washed 3 times with absolute ethanol to obtain white powder nano-scale calcium hydroxide, the particle size ranges from 70 to 100 nanometers, and the purity is 96%, which can be used as calcium hydroxide. The main raw material for the synthesis of preparations (such as calcium cyclopropanate, calcium lactate, etc.).

Embodiment 2

[0012] Embodiment 2, a kind of preparation method of nano-calcium hydroxide, mix and stir unslaked lime, ethanol, water according to mass ratio 1:5:3 and evenly make suspension, then this suspension is placed in ultrasonic reactor (Beijing Xianghu , XH300B), the ultrasonic power density of the ultrasonic reactor is 0.5-5.0 kW / L, which has the best particle size effect, and the effect will decrease if it exceeds this range. In this embodiment, the ultrasonic power density of 1.0 kW / L is selected. After 4 hours of digestion reaction, the product is separated by solid-liquid centrifugation and washed 3 times with absolute ethanol to obtain white powder nano-scale calcium hydroxide with a particle size range of 50-90 nanometers and a purity of 97%, which can be used as a flue Gas desulfurizer.

Embodiment 3

[0013] Example 3, a preparation method of nano-calcium hydroxide, mixing and stirring quicklime, propanol, and water according to the mass ratio of 1:3:2 to make a suspension, and then placing the suspension in an ultrasonic reactor (Beijing Xiang Hu, XH300B), the ultrasonic power density of the ultrasonic reactor is 0.5-5.0 kW / L, which has the best particle size effect, and the effect will decrease if it exceeds this range. In this embodiment, the ultrasonic power is selected at 1.5 kW / L Digestion reaction under density for 6 hours, the product is separated by solid-liquid centrifugation and washed 3 times with absolute ethanol to obtain white powder nano-scale calcium hydroxide, the particle size ranges from 20 to 60 nanometers, and the purity is 99%, which can be used as refractory Silica brick mineralizer raw material.

[0014] The organic solvents in Examples 1-3 are analytically pure.

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Abstract

The invention provides a preparation method for nanometer calcium hydroxide. According to the preparation method, quick lime powder, organic solvent, and water are uniformly mixed according to a certain ratio, so that a suspending liquid is prepared; the suspending liquid is then placed into an ultrasound reactor for decomposition, so that calcium hydroxide particles with nanometer-scale grain size are prepared. The preparation method has the characteristics that the raw materials are cheap and can be easily obtained, the decomposition liquid can be repeatedly used, the preparation condition is mild, the preparation process is simple and convenient, and the prepared nanometer calcium hydroxide is high in purity and uniform in particle size distribution; the preparation method can satisfy different requirements for environment management, fire-resisting materials, medicine, and other special fields.

Description

technical field [0001] The invention relates to a preparation method of nanometer calcium hydroxide. Background technique [0002] At present, the preparation of nano-calcium hydroxide generally adopts the double decomposition method, that is, the double decomposition of soluble calcium salts (such as calcium chloride, calcium nitrate, etc.) and strong bases (such as potassium hydroxide or sodium hydroxide) in surfactant solutions Reaction preparation. Disclosed a kind of technology such as Chen Qinghua etc. take soluble calcium salt, potassium hydroxide, sodium hydroxide or ammoniacal liquor as reactant, take synthetic macromolecular polymer or natural macromolecular polymer as surface active template agent and prepare nano-calcium hydroxide [Chen Qinghua et al. A preparation method of nano calcium hydroxide, publication number: CN1800025A]. Xu Jing from Fuzhou Normal University, etc. used calcium chloride and sodium hydroxide as reactants, sodium dodecyl sulfonate (SDS),...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/02B82Y30/00
CPCC01F11/02C01P2004/64
Inventor 刘妍杨富巍
Owner 杨富巍
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