Preparation method of aqueous paint for degradation of formaldehyde gas and toluene gas

A water-based paint, toluene technology, applied in chemical instruments and methods, separation methods, coatings, etc., can solve the problems of short decomposition time, poor catalyst dispersion, high temperature, etc., and achieve the effect of good stability and good environmental protection function

Active Publication Date: 2013-09-04
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the chemical reaction method can quickly remove formaldehyde and toluene in the air, this method needs to consume a large amount of chemical reagents, the cost is high, and the reagents used in some methods have certain toxicity
In addition, the chemical reaction method also has problems such as difficult recovery of the carrier after the reaction is saturated, and a large amount of material waste.
The thermal catalytic oxidation method does not need to consume chemical reagents, and there is no problem of reaction saturation, but it often requires a higher temperature, so it is not suitable for indoor use
Photocatalytic method and cold plasma method are new methods for decomposing formaldehyde and tolue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] A kind of preparation method that can be used for the water-based paint of formaldehyde and toluene gas degradation, concrete operation steps are as follows:

[0024] Step 1. Preparation of carrier

[0025] (1) Take 1 part of natural microporous structure non-metallic ore mineral powder with a median diameter of less than 10 microns, 10 parts of water and 0.005 part of sodium hexametaphosphate into a dispersion tank, and stir at a speed of 2000r / min for 30 minutes. After standing still for 10 minutes, take the upper dispersion liquid and filter, and the filtered solid matter is the filter cake;

[0026] (2) According to the mass solid-to-liquid ratio of 1: 3.5, add the filter cake obtained in the above step (1) and the sulfuric acid solution with a volume concentration of 30% into the purification tank, and stir for 40 minutes to obtain a suspension;

[0027] (3) Filter and wash the obtained suspension until there is no sulfate ion and the water content is 50%. The obt...

Embodiment 1

[0038] Step 1. Preparation of carrier

[0039] (1) Take 1 part of natural mineral tourmaline powder with a median diameter of less than 10 microns, 10 parts of water and 0.005 part of sodium hexametaphosphate into a dispersion tank, stir at a speed of 2000r / min for 30 minutes, and stand still for 10 minutes , take the upper part of the dispersion liquid to filter, and the filtered solid matter is the filter cake;

[0040] (2) According to the mass solid-to-liquid ratio of 1: 3.5, add the filter cake obtained in the above step (1) and the sulfuric acid solution with a volume concentration of 30% into the purification tank, and stir for 40 minutes to obtain a suspension;

[0041] (3) Filter and wash the obtained suspension until there is no sulfate ion and the water content is 50%. The obtained solid matter is called a purified filter cake, which is the carrier, and is ready for use.

[0042] Step 2. Preparation of nano-titanium dioxide composite photocatalytic material

[004...

Embodiment 2

[0052] Step 1. Preparation of carrier

[0053] (1) Take 1 part of natural mineral zeolite powder with a median diameter of less than 10 microns, 10 parts of water and 0.005 part of sodium hexametaphosphate into a dispersion tank, stir at a speed of 2000r / min for 30 minutes, and stand still for 10 minutes. Take the upper dispersion liquid and filter, and the filtered solid matter is the filter cake;

[0054] (2) According to the mass solid-to-liquid ratio of 1: 3.5, add the filter cake obtained in the above step (1) and the sulfuric acid solution with a volume concentration of 30% into the purification tank, and stir for 40 minutes to obtain a suspension;

[0055] (3) Filtrate and wash the obtained suspension until there is no sulfate ion and the water is 50%. The obtained solid matter is called a purified filter cake, which is the carrier and is used for later use.

[0056] Step 2. Preparation of nano-titanium dioxide composite photocatalytic material

[0057] (1) According ...

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PUM

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Abstract

A preparation method of an aqueous paint for degradation of a formaldehyde gas and a toluene gas is provided, and comprises: using a natural micropore nonmetal mineral as raw material; purifying the mineral by means of scrubbing, acid leaching, calcining and the like; using the purified micropore nonmetal mineral as a carrier, using an inorganic titanium salt as a precursor, and preparing a nano titanium dioxide composite photocatalytic material by neutralization, hydrolysis and precipitation at a low temperature; and using the prepared nano titanium dioxide composite photocatalytic material as a filler, and preparing the aqueous paint for degradation of the formaldehyde gas and the toluene gas. Harmful substances such as volatile organic compounds, formaldehyde, toluene and the like are not contained in the paint, and the formaldehyde gas and the toluene gas can be effectively degraded, with the formaldehyde degradation rate of up to 80% or more and the toluene degradation rate of up to 35% or more.

Description

technical field [0001] The invention relates to a preparation method of an inorganic chemical and photocatalytic material, in particular to a preparation method of a water-based paint which can be used for the gas degradation of formaldehyde and toluene. Background technique [0002] Indoor formaldehyde and toluene pollution are the most harmful pollution in indoor pollution, seriously endangering people's health. Due to the limitations of current technological means and materials, the hazards of formaldehyde and toluene cannot be removed from the source in the short term. Therefore, effective removal of formaldehyde and toluene pollution in living rooms and offices is very important to protect human health. [0003] At present, the control methods of formaldehyde and toluene gas at home and abroad mainly include physical adsorption method, chemical reaction method, catalytic oxidation method, biological method, composite method and cold plasma method. There is a problem o...

Claims

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Application Information

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IPC IPC(8): C09D7/12C09D1/00B01J21/06B01D53/86B01D53/72
Inventor 王利剑郑水林
Owner LUOYANG INST OF SCI & TECH
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