Method for degrading formaldehyde pollutant with catalyzing wet oxidation process

A technology for catalyzing wet oxidation and pollutants, which is applied in the field of treatment of high-concentration formaldehyde pollutants, can solve the problems of high cost of catalyst and hydrogen peroxide, impossibility of industrial application, unfavorable industrial application, etc., and achieves low treatment cost, wide application range, Remove the effect completely

A technology for catalyzing wet oxidation and pollutants, which is applied in the field of treatment of high-concentration formaldehyde pollutants, can solve the problems of high cost of catalyst and hydrogen peroxide, impossibility of industrial application, unfavorable industrial application, etc., and achieves low treatment cost, wide application range, Remove the effect completely

CN101844827AInactive Publication Date: 2010-09-29EAST CHINA UNIV OF SCI & TECH
1 Cites 20 Cited by

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be further described below in conjunction with embodiment:

[0018] In the following examples, a commercially available formaldehyde solution with a mass percentage of 38-40% was used. First, water was used to prepare a 1000 mg / L formaldehyde solution, and then 20 ml of formaldehyde solution with a concentration of 1000 mg / L was loaded into a small autoclave; Then add a metal-metal oxide composite catalyst into the reaction system, seal it, and finally fill it with oxygen or air at a certain pressure, and raise the temperature to a specified temperature while stirring, and the reaction time is 0.5 to 8 hours. The removal rate of formaldehyde after the reaction is shown in Table 1.

[0019] Wherein, the preparation method of the metal-metal oxide composite catalyst is: preparing a metal salt solution containing the active component, the concentration of which is 0.1M / L; adding a metal oxide carrier to the metal salt solution, A mixture is form...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for degrading high-concentration formaldehyde pollutant with a catalyzing wet oxidation process by adopting metal-metal oxide as a catalyst. The formaldehyde pollutant water solution with the mass concentration of 100 to 10000 mg / L is arranged into a high-pressure reactor, metal-metal oxide compound catalyst is added into the reactor, oxygen or air is used as an oxidant, the formaldehyde pollutant is removed through the oxidation reaction, the reaction temperature is 60 to 200 DEG C, the reaction pressure is 0.5 to 3MPa, pH value of the reaction solution is 2 to 10, and the reaction time is 0.5 to 8 hours. The reaction condition by adopting the method to process the formaldehyde waste water is moderate, the cost is low, the removal rate of total organic carbon of formaldehyde containing the formaldehyde reaches more than 90 percent, secondary pollution does not exist, and the method is applicable to the degradation of the formaldehyde pollutant in the industrial waste water and has promising industrialized application prospect.

Description

【Technical field】 [0001] The invention relates to the treatment of high-concentration formaldehyde pollutants, in particular to a method for catalytic wet oxidation degradation of formaldehyde pollutants. 【Background technique】 [0002] Formaldehyde (HCHO) is a protoplasmic poison that destroys the protein of biological cells. It can cause damage to human skin, respiratory tract and internal organs, anesthetize the central nervous system, and cause pulmonary edema, hepatic coma, and kidney failure. The World Health Organization has confirmed that formaldehyde is a teratogenic and carcinogenic substance, and long-term exposure can cause gene mutations. Wastewater containing formaldehyde comes from a wide range of sources, including chemical, organic synthesis, pharmaceutical, paint, coating, plastic, textile, military, and wood adhesive industries. Among them, the discharge concentration of formaldehyde-containing wastewater from wood treatment enterprises such as formalin s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
29 Sep 2010
Publication
CN101844827A
IPC
C02F1/72; C02F1/74; C02F1/58
Inventors
章飞芳; 李亚浦