A kind of preparation method of highly active nanometer calcium hydroxide

A calcium hydroxide, high activity technology, applied in the direction of calcium/strontium/barium oxide/hydroxide, nanotechnology, nanotechnology, etc. control and other issues to achieve the effect of reducing interaction, preventing particle agglomeration, and realizing recycling

Active Publication Date: 2022-04-26
苏州夏阳环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current preparation methods of nano-calcium hydroxide all focus on controlling the particle size of nano-calcium hydroxide, ignoring the control of the crystal form of nano-calcium hydroxide. The nano-calcium hydroxide prepared by different methods will show a wide variety of structures and Crystal form, different structures and crystal forms will affect the application of nano-calcium hydroxide, and some structures will limit its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation method of highly active nano calcium hydroxide, which comprises the following steps:

[0023] (1) The terminal hydroxy polybutadiene is dissolved in toluene, and then added to the organotitanium catalyst, and then added triethylamine after the reaction of 18h under stirring conditions of 100r / min to give a mixed solution, the mixed solution centrifuged and separated to remove the precipitate to give solution A; the mass ratio of the terminal hydroxy polybutadiene to toluene is 0.12g: 1ml, the organotitanium catalyst and the terminal hydroxy polybutadiene mass ratio of 3: 1, the mass ratio of the terminal hydroxy polybutadiene to triethylamine is 5g : 1ml; the organotium catalyst is titanium trichloride cyclopentadienyl titanium;

[0024] (2) Add n-hexyl isocyanate to solution A for the reaction for 30h, and then add an equal volume of methanol to filter to obtain precipitate B, and then add water to precipitate B, heated to 70 ° C constant temperature under st...

Embodiment 2

[0028] Preparation method of highly active nano calcium hydroxide, which comprises the following steps:

[0029](1) The terminal hydroxy polybutadiene is dissolved in toluene, and then the organotum catalyst is added, and then triethylamine is added to the reaction 24h to obtain a mixed solution under stirring conditions at a speed of 150r / min, and the mixed solution is centrifuged to remove the precipitate to give solution A; the volume ratio of the terminal hydroxy polybutadiene to toluene is 0.15g: 1ml, the mass ratio of the organotitanium catalyst and the terminal hydroxy polybutadiene is 4:1, and the volume ratio of the terminal hydroxy polybutadiene to triethylamine is 6g The organotium catalyst is titanium trichloride pentamethylcyclopentadienyl titanium;

[0030] (2) Add n-hexyl isocyanate to solution A for the reaction for 32h, and then add an equal volume of methanol to filter to obtain precipitate B, and then add water to precipitate B, heated to 70 ° C constant temp...

Embodiment 3

[0034] Preparation method of highly active nano calcium hydroxide, which comprises the following steps:

[0035](1) The terminal hydroxy polybutadiene is dissolved in toluene, and then the organotum catalyst is added, and then triethylamine is added to the reaction under stirring conditions at a speed of 200r / min for 12h to obtain a mixed solution, and the mixed solution is centrifuged to remove the precipitate to give solution A; the volume ratio of the terminal hydroxy polybutadiene to toluene is 0.135g: 1ml, and the mass ratio of the organotitanium catalyst and the terminal hydroxy polybutadiene is 3.6 :1, the volume ratio of the mass of the terminal hydroxypobutadiene to triethylamine is 5.5g: 1ml; the organotium catalyst is pentamethyl carmonene tribenzyloxy titanium;

[0036] (2) Add n-hexyl isocyanate to solution A for the reaction for 24h, and then add an equal volume of methanol to filter to obtain precipitate B, and then add water to precipitate B, heated to 70 ° C co...

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PUM

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Abstract

The invention discloses a preparation method of high-activity nano-calcium hydroxide. First, hydroxyl-terminated polybutadiene is dissolved in toluene, then an organic titanium catalyst is added, and triethylamine is added to react under stirring conditions to obtain a mixed solution. , centrifuge the mixed solution to remove the precipitate to obtain solution A; then add n-hexyl isocyanate to solution A for reaction, then add an equal volume of methanol and filter to obtain precipitate B, then add water to precipitate B, and heat under stirring Keep the temperature at 70°C, and after the precipitate B is completely dissolved, quickly cool to room temperature to obtain a mixture C, then add high-purity calcium oxide to the mixture C to react to obtain a mixture D; then slowly heat the mixture B to 60-70°C, and then filter to obtain Precipitate E and filtrate, and vacuum-dry the precipitate E to obtain nanometer calcium hydroxide. The method is convenient to control the crystal form and structure of the nanometer calcium hydroxide in the production process, and obtains a highly active nanometer calcium hydroxide product.

Description

Technical field [0001] The present invention belongs to the field of calcium hydroxide production technology, specifically relates to a highly active nano calcium hydroxide preparation method. Background [0002] Calcium hydroxide is a strong alkali with sterilization and antiseptic capabilities, and has a wide range of applications in industry. It is a commonly used building material and is also used as a fungicide and chemical raw material. At present, the commonly used calcium hydroxide preparation method is lime digestion method, that is, after calcination into calcium oxide, it is digested in proportion to the selected water, and the calcium hydroxide material solution is purified and separated from the slag, and then dehydrated by centrifugation, drying and screening to obtain the finished calcium hydroxide product; or the calcium chloride is dissolved in water, heated and added to the filtered sodium hydroxide solution to obtain calcium hydroxide, the resulting slurry mix...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/02B82Y30/00B82Y40/00
CPCC01F11/02B82Y30/00B82Y40/00C01P2004/64C01P2006/12C01P2006/80
Inventor 韦明
Owner 苏州夏阳环保科技有限公司
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