Modified carbon capable of efficiently removing formaldehyde at normal temperature and preparation method of modified carbon

Abstract

The invention discloses a preparation method of modified carbon capable of efficiently removing formaldehyde at the normal temperature. The preparation method comprises the steps as follows: (1) preparing an organic amine solution with the mass concentration being 1%-10%; (2) adjusting the pH value of the organic amine solution to 10.0-11.5 with a sulfuric acid solution to obtain an organic amineimpregnation liquid; (3) adding activated carbon to the organic amine impregnation liquid, and performing uniform mixing and impregnation; (4) taking out and drying the impregnated activated carbon toobtain the modified carbon capable of efficiently removing formaldehyde at the normal temperature. The preparation method of the modified carbon is simple and easy to implement. Tests prove that themodified carbon prepared with the preparation method can quickly trap and efficiently adsorb formaldehyde gas, has good formaldehyde removal long-acting performance and can meet the requirement of long-term effective formaldehyde removal in the indoor environment.

Description

technical field [0001] The invention relates to a formaldehyde-removing material, in particular to a normal-temperature high-efficiency formaldehyde-removing modified carbon and a preparation method thereof. Background technique [0002] With the development of social economy and the improvement of human living standards, people's requirements for quality of life are getting higher and higher, and the decoration of living rooms is becoming more and more popular. However, while the decoration of the living room has brought us convenience, it has also brought pollution to our indoor air. [0003] Plywood, MDF, plywood, composite wood flooring and other artificial wood panels used for decoration are bonded by urea-formaldehyde resin glue or phenolic resin glue. These resin glues contain free formaldehyde, which can be slowly released under normal temperature and pressure. into the air. Formaldehyde released by decoration materials has become one of the main pollutants in indo...

AI Technical Summary

Problems solved by technology

However, due to the small molecular weight and strong polarity of formaldehyde, it is difficult to remove it by physical adsorption with ordinary activated carbon.

For this reason, some people carry out physical treatment on ordinary activated carbon, specifically to change the pore structure of activated carbon (such as: pore volume, pore size or pore distribution, etc.). Although the formaldehyde removal performance of activated carbon after physical treatment has been improved, it is far from Far from meeting the actual application requirements

Some people use sodium bisulfite to impregnate ordinary activated carbon to make modified activated carbon, but the formaldehyde removal rate of this modified carbon can only reach about 50%, and no experimental research has been carried out on its long-acting formaldehyde removal

Images