Preparation method of phenolic resin combined honeycomb activated carbon

Abstract

The invention relates to a preparation method of phenolic resin combined honeycomb activated carbon, which can be used for preparing the honeycomb activated carbon by the steps of: mixing dry powder, preparing plastic pug by mixing and kneading through a wet method, vacuum pugging, extrusion molding, drying, curing treatment and secondary heat treatment. Besides the function of bonding and improving the mechanical strength of the activated carbon, the phenolic resin also remarkably improves the heat-resisting property and water resistance of the honeycomb activated carbon; and furthermore, the honeycomb activated carbon is added with porous mineral, thus better effectively improving the mechanical strength and the specific surface area of the honeycomb activated carbon. The preparation method has lower heat treatment temperature and low production energy consumption, and effectively reduces the production cost; and the preparation technique and equipment thereof are simple, and the production investment is lower, so that the cost is further reduced.

Description

technical field [0001] The invention belongs to the technical field of materials and environmental protection, and relates to a preparation method of honeycomb activated carbon, in particular to a preparation method of phenolic resin combined with honeycomb activated carbon. Background technique [0002] The honeycomb activated carbon in activated carbon has the advantages of high porosity, large geometric surface area, wear resistance and strong dust resistance, and the bed pressure loss is small, and the adsorption and desorption speed is fast, so it can be easily used for gas purification, solvent The advantages of recovery and catalyst support have made this activated carbon the main demand for activated carbon. [0003] And now there are mainly three methods for the preparation of honeycomb activated carbon, the first method is as disclosed in the patent US005451554A to the preparation method of honeycomb activated carbon, by adding liquid water-soluble epoxy resin and ...

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Problems solved by technology

[0003] And now there are mainly three methods for the preparation of honeycomb activated carbon, the first method is as disclosed in the patent US005451554A to the preparation method of honeycomb activated carbon, by adding liquid water-soluble epoxy resin and clay substances, combined with organic plastic agent , honeycomb activated carbon with high mechanical strength is prepared by two-step heat treatment. Although the honeycomb activated carbon obtained by this preparation method has good heat resistance, it still has the advantages of high strength and large specific surface area at 250 ° C, and good water resistance, but The disadvantage is that the thermal decomposition temperature of the binder PVA is high, resulting in a high secondary heat treatment temperature and increasing energy consumption.

The second method is as disclosed in the patent CN101214955A to the preparation method of honeycomb activated carbon, by adding a surface modifier emulsion in the plastic mud, the green body is dried twice at 100-200 ° C, although the preparation method can obtain The honeycomb activated carbon has a large specific surface area and good water resistance, but its disadvantages are high drying temperature, long drying time, increased energy consumption, and low strength

The third method is the preparation method of honeycomb activated carbon as announced in the patent US005389325A, by adding powdered phenolic resin in the mud as a binder, and obtaining honeycomb activated carbon through curing and activation treatment at a lower temperature, although this The honeycomb activated carbon obtained by the preparation method has a large specific surface area, high mechanical strength and good water resistance, but its disadvantage is that it is easy to crack during the drying process of manufacturing honeycomb activated carbon, and it needs to be made under a relative humidity greater than 90%. The drying speed of the body is slow to obtain a crack-free honeycomb body; the larger the drying size, the more difficult it is to control the cracking of the green body, which leads to a higher heat treatment temperature, high energy consumption, high cost and high temperature treatment leading to water resistance of the honeycomb activated carbon Relatively poor