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Opal composite formaldehyde purification material and preparation method thereof

A technology of formaldehyde purification and protein clay, which is applied in the direction of chemical instruments and methods, separation methods, and other chemical processes, can solve the problems of poor formaldehyde affinity, saturated adsorption capacity of formaldehyde, and low purification efficiency, and achieve simple and large-scale preparation process. Application value, effect of mild reaction conditions

Active Publication Date: 2019-02-12
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of natural protein soil contains less functional groups, and its affinity with formaldehyde is poor, and its saturated adsorption capacity and purification efficiency of formaldehyde are low.

Method used

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  • Opal composite formaldehyde purification material and preparation method thereof
  • Opal composite formaldehyde purification material and preparation method thereof
  • Opal composite formaldehyde purification material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The specific implementation steps are as follows:

[0019] (1) Prepare an aqueous ethanol solution with anhydrous ethanol and pure water at a mass ratio of 1:1;

[0020] (2) Add protein clay powder to the ethanol solution described in step (1) in a mass ratio of 1:8, stir and disperse to form a suspension;

[0021] (3) adding the pre-hydrolyzed aminosilane solution to the suspension prepared in step (2) for graft modification, the amount of gamma-aminopropyltrimethoxysilane is 36% of the protein soil quality, and the modification temperature is 90 ℃, the modification time is 1h.

[0022] (4) washing and filtering the reaction product obtained in step (3) with ethanol and water, and drying at 60°C for 12 hours;

[0023] (5) Grinding the dried product obtained in step (4) until 97% passes through a 200-mesh sieve. That is, the protein soil composite formaldehyde purification material is obtained.

[0024] The XPS and TG figures of the protein soil composite formaldehy...

Embodiment 2

[0026] The steps are the same as those in Example 1, except that: in step (2), the protein soil powder is added to the ethanol solution described in step (1) at a mass ratio of 1:7 to stir and disperse; in step (3), the amount of silane used is protein The soil mass is 27%, the modification temperature is 80°C, and the modification time is 2h; the drying temperature in step (4) is 70°C, and the drying time is 11h.

Embodiment 3

[0028] The steps are the same as those in Example 1, except that: in step (2), the protein soil powder is added to the ethanol solution described in step (1) at a mass ratio of 1:6 to stir and disperse; in step (3), the amount of silane used is protein 18% of the soil mass, the modification temperature is 70°C, and the modification time is 3h; the drying temperature in step (4) is 80°C, and the drying time is 10h.

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Abstract

The invention relates to an opal composite formaldehyde purification material and a preparation method thereof, and belongs to the field of nonmetallic mineral materials and environmental engineering.The preparation method comprises the following steps of: using opal as a carrier and amino silane as a modifier, adding an amino group on the surface of the opal by adopting a surface graft modification method to prepare the opal composite formaldehyde purification material. By use of relatively high affinity of the amino group to formaldehyde, the amino group on the surface of the opal is addedthrough graft modification on the surface of the opal, so that the gaseous formaldehyde pollutant capture performance of the prepared composite material is greatly improved, and the problem that the natural opal has relatively low formaldehyde adsorption and purification capacity is solved; and the required raw material is cheap and easy to get, the preparation process is simple, the reaction condition is mild, and the opal composite formaldehyde purification material has a relatively high application value in the field of indoor formaldehyde gas purification.

Description

technical field [0001] The invention relates to a protein soil composite formaldehyde purification material and a preparation method thereof, belonging to the fields of non-metallic mineral materials and environmental engineering. Background technique [0002] Indoor gas pollutants in modern offices, automobiles and households are mainly formaldehyde, which is colorless and has a strong odor. It has the characteristics of widespread pollution and long-term pollution. Agents and chemical fiber carpets, etc. Formaldehyde is a highly toxic substance, which has been identified as carcinogenic and teratogenic substances by the World Health Organization. Long-term exposure to formaldehyde can cause chronic respiratory diseases, colon cancer, nasopharyngeal cancer, brain cancer, etc. Children and pregnant women are particularly sensitive to formaldehyde, and the harm is even greater. At present, the methods for treating formaldehyde at home and abroad mainly include photocatalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01D2253/11B01D2253/20B01D2257/708B01J20/12B01J20/22B01J2220/46B01J2220/4806B01J2220/4812
Inventor 郑水林刘阳钰孙志明贾宏伟
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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