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Multifunctional material based on diatomite and its preparation method and application

A diatomite and multi-functional technology, applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of decreased adsorption performance, limited diatomite adsorption function, and decreased ability to decompose formaldehyde, achieving high-efficiency air filter effect

Active Publication Date: 2016-03-23
内蒙古东盛硅藻土科技创新产业园有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, diatomite itself does not have gelling properties. If it is compounded with reinforcing materials such as cement in order to improve its cohesiveness and strength, diatomite will not only be unable to be recycled, but also limit the adsorption function of diatomite. The direct effect is that the adsorption performance is reduced.
Some use resin binders, which block the tiny pores of diatomaceous earth, resulting in a decrease in the ability to decompose formaldehyde

Method used

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  • Multifunctional material based on diatomite and its preparation method and application
  • Multifunctional material based on diatomite and its preparation method and application
  • Multifunctional material based on diatomite and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Weigh 100 g of diatomite powder, add 0.5 mol / L sodium hydroxide aqueous solution, and cook at 85° C. for 7.5 hours to obtain diatomite cooking liquid. The diatomaceous earth cooking liquor is filtered to obtain a diatomaceous earth cooking filtrate. Add glycerin to the diatomaceous earth cooking filtrate and stir evenly, then add polyvinylpyrrolidone and stir evenly, then add ethanol and stir evenly. The pH was adjusted to pH 6 and allowed to stand at room temperature for 12 hours to obtain the first diatomaceous earth gel. The first diatomite gel was soaked in ethanol for 12 hours, during which the ethanol was replaced every 4 hours to obtain the second diatomite gel. Then, the second diatomite gel is subjected to supercritical drying to obtain the diatomite-based multifunctional material.

[0053] Fill the prepared multifunctional material into a tubular container with a diameter of 40 cm and a length of 20 cm and vibrate it. The two ends of the multifunctional mate...

Embodiment 2 to 20

[0055] Except the contents shown in Table 1, the multifunctional material was prepared in the same manner as in Example 1 and the formaldehyde suction filtration rate and bactericidal rate were measured in the same manner.

Embodiment 21

[0057] Except adding ethanol, PVP and glycerin in the order of adding ethanol first, then adding PVP, and then adding glycerin, powdery filter materials were prepared in the same manner as in the examples and the formaldehyde suction filtration rate was measured in the same manner.

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Abstract

The invention provides a method for preparing a diatomite-based multifunctional material, characterized in that the method mainly includes the following steps: obtaining diatomite powder; cooking the diatomite powder and a monobasic alkali aqueous solution , to obtain a diatomite cooking liquor; filter the diatomite cooking liquor to obtain a diatomite cooking filtrate; add glycerol, polyvinylpyrrolidone, ethanol and fiber to the diatomite cooking filtrate in turn and stir evenly; adjusted to pH 5 to 6, then poured into a mold and allowed to stand at room temperature until gelled to obtain a first diatomite gel; demolding the first diatomite gel and soaking in ethanol for 12 to 18 hours , to obtain a second diatomite gel; performing supercritical drying on the second diatomite gel to obtain the diatomite-based multifunctional material. The multi-functional material prepared by the method of the present invention has remarkable ability to absorb formaldehyde and can be used for indoor partition and / or air filtration.

Description

technical field [0001] The present invention relates to the preparation of materials. Background technique [0002] The molecular formula of formaldehyde is HCHO, and the molecular weight is 30.03. It is the simplest aldehyde and is usually a flammable, colorless and irritating gas. Formaldehyde is an important organic raw material, mainly used in plastic industry (such as phenolic resin, urea-formaldehyde plastic), synthetic fiber (such as synthetic vinylon polyvinyl formal), leather industry, medicine, dyes, etc. However, formaldehyde is significantly toxic. Human inhalation 60~120mg / m 3 , bronchitis, severe lung damage; people inhaled 12 ~ 24mg / m 3 , Nasal and pharyngeal mucosa severe burns, tearing, coughing; 10-20ml by mouth, fatal. Human inhalation 20~70mg / m 3 For a long time, loss of appetite, weight loss, weakness, headache, insomnia; human inhalation 12mg / m 3 Long-term exposure, drowsiness, weakness, headache, finger tremor, vision loss. Mammalian somatic mut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/14B01J20/30B01D53/02
Inventor 文启东崔俊峰文博邹晓虎
Owner 内蒙古东盛硅藻土科技创新产业园有限公司