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Method for improving humidifying capacity of diatomite

A technology of diatomite and humidity control, which is applied in the field of daily chemicals, can solve the problems of restricting the development of the field of humidity control, and achieve the effect of increasing the saturated moisture absorption rate

Inactive Publication Date: 2012-10-10
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Diatomite raw ore earth and purified diatomite have saturated moisture absorption rates of 5% and 8% in a constant temperature and humidity environment with T=20°C and relative humidity RH=88%, which limits its application in the field of humidity control. develop

Method used

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  • Method for improving humidifying capacity of diatomite
  • Method for improving humidifying capacity of diatomite
  • Method for improving humidifying capacity of diatomite

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Example 1 lithium chloride-diatomaceous earth humidity control material

[0023] Diatomite and 10% lithium chloride aqueous solution are reacted at 50° C. for 30 minutes at a mass ratio of 1:3, and the lithium chloride-modified diatomite humidity-conditioning material of the present invention is obtained after suction filtration and drying. The tonality performance is: in a constant temperature and humidity environment with T=20°C and relative humidity RH=88%, its saturated moisture absorption rate is 98%; in a constant temperature and humidity environment with T=20°C and relative humidity RH=15% , The saturation dehumidification rate is 12.1%.

example 2

[0024] Example 2 lithium chloride-diatomaceous earth humidity control material

[0025] Diatomaceous earth and lithium chloride aqueous solution with a mass fraction of 30% were reacted at 80° C. for 30 minutes at a mass ratio of 1:5, and after suction filtration and drying, the lithium chloride-modified diatomite humidity-conditioning material of the present invention was obtained. The tonality performance is: in a constant temperature and humidity environment with T=20°C and relative humidity RH=88%, its saturated moisture absorption rate is 110%; in a constant temperature and humidity environment with T=20°C and relative humidity RH=15% , The saturation dehumidification rate is 14.3%.

example 3

[0026] Example 3 sodium chloride-diatomaceous earth humidity control material

[0027] Diatomite and 30% sodium chloride aqueous solution with a mass fraction of 1:5 were reacted at 60° C. for 30 minutes, and the calcium chloride-modified diatomite humidity-conditioning material of the present invention was obtained after suction filtration and drying. Humidity control performance: in a constant temperature and humidity environment with T=20°C and relative humidity RH=88%, the saturated moisture absorption rate is 27%, and in a constant temperature and humidity environment with T=20°C and relative humidity RH=15%, The saturation dehumidification rate was 3.4%.

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Abstract

The invention discloses a method for improving humidifying capacity of diatomite, relating to the technical field of daily chemicals. The method is characterized by comprising the steps of: reacting diatomite with an inorganic salt water solution with mass percent concentration of 10-30 percent in a mass ratio of 1:3-1:5 for 30-90min at a temperature of 50-80 DEG C, and filtering and drying to obtain a diatomite based humidifying material, wherein the diatomite meets the conditions that the content of SiO2 is not less than 89 percent and the specific surface area is not less than 26m<2> / g andthe pore volume is not less than 0.05ml / g; and the inorganic salt is one of LiCl, MgCl2, CaCl2 and NaCl. The diatomite needs to reach certain purity, specific surface area and pore volume, is used asa channel enabling to water vapor to pass in and out and a container for storing water, and also has a certain moisture absorption and discharge performance. The modification of the inorganic salt further enhances the moisture absorption performance of the diatomite, and the modified and enhanced humidifying material has a moisture absorption rate of reaching 110 percent. The inorganic salt is mutually fixed with a diatomite porous body. The invention provides a humidifying functional material with high humidifying performance.

Description

Technical field: [0001] The invention relates to the technical field of daily chemicals, in particular to a method for improving the humidity-regulating property of diatomite. Background technique: [0002] Air humidity is an important environmental parameter closely related to people's life and production. Based on the problems of high energy consumption and "building interior syndrome" existing in traditional mechanical humidity control methods (air conditioners and humidifiers), humidity control materials have emerged as the times require. Humidity-regulating materials refer to materials that rely on their own moisture absorption and desorption properties, sense changes in air humidity, and automatically adjust the relative humidity of the air. It is not only an important method to solve the comfort of indoor wet environment, but also has important significance in environmental protection and energy saving. [0003] In recent years, the humidity control materials develo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/14B01J20/30B01D53/28
Inventor 杜玉成孔伟王从曾卜仓友梦琪颜晶
Owner BEIJING UNIV OF TECH
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