Mechanical-activation solid-phase preparation method of lignocellulose ester group oxidation catalyst

Abstract

The invention discloses a mechanical-activation solid-phase preparation method of a lignocellulose ester group oxidation catalyst. The mechanical-activation solid-phase preparation method comprises following steps: cellulosic solid waste is dried and smashed so as to obtain cellulosic solid waste powder; the cellulosic solid waste powder, an esterifying agent, and an accessory ingredient are delivered into a mixing machine for uniform mixing at a ratio of 100:5-40:1-8 so as to obtain a mixture; the mixture and a grinding medium are delivered into a mechanical-activation solid-phase reactor at a ratio of 100g:200-600ml for ball milling reaction at a rotating speed ranging from 200 to 600rpm at 30-60 DEG C constant water bath temperature; after 0.5 to 1.5h of activation, stirring is stopped, and an esterification product and grinding balls are collected, and are separated so as to obtain a lignocellulose ester mixture; and the lignocellulose ester mixture is subjected to pelletizing so as to obtain the lignocellulose ester group oxidation catalyst. The lignocellulose ester group oxidation catalyst contains no heavy metal, possesses catalytic performance, activation oxidation performance, and adsorption performance at the same time, and can be used for selective adsorption of heavy metal and improving decolorizing effect; and at the same time, cost is low because that the raw materials are solid wastes, the preparation method is simple, and adding amount is low.

Description

technical field [0001] The invention belongs to the field of lignocellulose modification, in particular to a preparation method and application of a heavy metal-free lignocellulose ester-based oxidation catalyst used for degradation of organic wastewater. Background technique [0002] With the rapid development of the chemical industry and its related industries, especially the development of chemical industry, pesticide, medicine, papermaking, printing and dyeing, metallurgy and other industries, a large amount of industrial wastewater is discharged outside the standard, causing more than one third of the country's river sections to be polluted , more than 90% of urban waters are seriously polluted, and nearly 50% of key urban water sources do not meet drinking water standards. Among them, the types and quantities of organic wastewater are increasing day by day. These refractory organic pollutants exist in water for a long time, have a wide range of migration, and are diffi...

AI Technical Summary

Problems solved by technology

However, the production and use costs of this heterogeneous catalyst are relatively high, and the recovery and regeneration process is complicated.

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