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Calcium hydroxide/natural zeolite composite humidifying material and preparation method thereof

A technology of natural zeolite and humidity control materials, applied in chemical instruments and methods, silicon compounds, crystalline aluminosilicate zeolites, etc., to achieve the effects of optimization of pore structure and surface properties, process energy saving, green environmental protection, and great application value

Pending Publication Date: 2022-01-18
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN103318909A discloses a method of using microwave-assisted ammonium chloride to improve the humidity control performance of zeolite. The zeolite powder treated by this method also has good humidity control performance, but ammonium salt is used in the preparation process. Humid materials, especially indoor building humidity-conditioning materials, have the risk of releasing ammonia under conditions such as heating or room temperature rise

Method used

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  • Calcium hydroxide/natural zeolite composite humidifying material and preparation method thereof
  • Calcium hydroxide/natural zeolite composite humidifying material and preparation method thereof
  • Calcium hydroxide/natural zeolite composite humidifying material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) First take by weighing 100g of natural staphilite powder (the powder fineness is D 97 =80 μm, the whiteness of the powder (blue light whiteness, the same below) is 89%, XRD quantitative analysis shows that the mineral content of hematilite in natural hematilite powder is 94%. The sample is marked as NS) and adds in the three-neck flask of 500ml; And predetermined Ca(OH) 2 The coating amount is 10%;

[0028] (2) According to the natural hematite powder quality (100g) and predetermined Ca(OH) 2 Coating amount (10%), calculate NaOH and CaCl 2 The reaction produces Ca(OH) 2 The theoretical mass is 10g, and according to NaOH and CaCl 2 The reaction produces Ca(OH) 2 Calculate the required NaOH and dihydrate CaCl by the molar ratio of the reaction 2 The masses are 10.81g and 19.86g respectively, and the corresponding masses of NaOH and dihydrate CaCl are weighed 2 ;

[0029] (3) According to the natural hematite powder quality (100g) taken by weighing, the calcula...

Embodiment 2

[0035] (1) First take by weighing 100g of natural clinoptilolite powder (the powder fineness is D 97 =100 μm, the whiteness of the powder is 78%, XRD quantitative analysis shows that the clinoptilolite mineral content in the natural clinoptilolite powder is 85%. The sample is marked as NC) and adds in the three-neck flask of 1000ml; And predetermined Ca(OH) 2 The coating amount is 20%;

[0036] (2) According to the natural clinoptilolite powder quality (100g) and predetermined Ca(OH) 2 Coating amount (20%), calculate NaOH and CaCl 2 The reaction produces Ca(OH) 2 The theoretical mass is 20g, and according to NaOH and CaCl 2 The reaction produces Ca(OH) 2 Calculate the required NaOH and dihydrate CaCl by the molar ratio of the reaction 2 The quality of each is 21.62g and 39.73g, and the corresponding quality of NaOH and dihydrate CaCl 2 ;

[0037] (3) According to the natural clinoptilolite powder quality (100g) taken by weighing, the calculated Ca(OH) 2 Theoretical ma...

Embodiment 3

[0043] (1) First weigh 100g of natural zeolite powder (the powder fineness is D 97 =75 μm, the whiteness of the powder is 75%, XRD quantitative analysis shows that the total mineral content of clinoptilolite and mordenite in the zeolite powder is 83%. The sample is marked as NZ) into a 1000ml three-neck flask; and predetermined Ca(OH) 2 The coating amount is 15%;

[0044] (2) According to the weighed natural zeolite powder quality (100g) and predetermined Ca(OH) 2 Coating amount (15%), calculated NaOH and CaCl 2 The reaction produces Ca(OH) 2 The theoretical mass is 15g, and according to NaOH and CaCl 2 The reaction produces Ca(OH) 2 Calculate the required NaOH and dihydrate CaCl by the molar ratio of the reaction 2 The quality of each is 16.22g and 29.80g, and the corresponding quality of NaOH and dihydrate CaCl 2 ;

[0045] (3) According to the weighed natural zeolite powder quality (100g), the calculated Ca(OH) 2 Theoretical mass (15g), according to liquid-solid ra...

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Abstract

The invention relates to a calcium hydroxide / natural zeolite composite humidity control material and a preparation method thereof, and belongs to the field of non-metallic mineral functional materials and inorganic humidity control materials. The method comprises the following steps: adding water into natural zeolite to prepare ore pulp, weighing NaOH and CaCl2 dihydrate according to a preset Ca(OH)2 coating amount and a reaction molar ratio of the NaOH to the CaCl2 to generate Ca(OH)2, and respectively adding water to prepare respective uniform solutions; adding a NaOH solution and a CaCl2 solution into the natural zeolite ore pulp in a parallel flow mode, and evenly depositing Ca(OH)2 on the surfaces of natural zeolite particles in a coated manner; preparing Ca(OH)2 / natural zeolite composite powder suspension liquid with a certain liquid-solid ratio; then carrying out hydrothermal reaction on the Ca(OH)2 / natural zeolite composite powder suspension; and finally, filtering, washing, drying and depolymerizing the hydrothermal reaction product to prepare the calcium hydroxide / natural zeolite composite humidifying material. According to the invention, the humidifying performance of the natural zeolite is obviously improved, and the preparation method is energy-saving, green and environment-friendly, and has higher application value and good application prospect in the field of building humidifying materials.

Description

technical field [0001] The invention relates to a calcium hydroxide / natural zeolite composite humidity control material and a preparation method thereof, belonging to the field of non-metallic mineral functional materials and inorganic humidity control materials. Background technique [0002] Most of the natural porous minerals have the advantages of balanced moisture absorption and release properties, cheap and easy-to-obtain raw materials, good chemical stability, and good compatibility with building substrates. Environmental humidity has an important impact on human health. As people pay more and more attention to indoor environmental humidity, mineral humidity-regulating materials have attracted much attention as indoor building humidity-regulating materials in recent years. Mineral humidity control materials that have been reported so far include several natural non-metallic minerals such as diatomite, sepiolite, zeolite, protein clay, bentonite and kaolin. Among them...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30C01B39/02
CPCB01J20/165B01J20/041C01B39/026B01J2220/4806B01J2220/42
Inventor 郑水林狄永浩孙志明李春全
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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