A kind of method that utilizes waste methanol catalyst to prepare mercury removing agent

Abstract

The invention provides a method for preparing a mercury removing agent from a waste methanol catalyst. The method comprises the following steps: (1) crushing the waste methanol catalyst and mixing the crushed catalyst with a binder, extruding the mixture into strips, drying and calcining at 350-500 DEG C for 1-8 hours to obtain a mercury removing agent precursor; and (2) putting the mercury removing agent precursor into contact with sulfur-containing waste gas for sulfidizing treatment, and drying to obtain the mercury removing agent. According to the method for preparing the mercury removing agent from the waste methanol catalyst, as the waste methanol catalyst is taken as the raw material, resources can be saved, the cost can be reduced, and aluminum in the waste methanol catalyst also can be kept functioning in binding and enhancing adsorption in the final product mercury removing agent; the existing aluminum also serves as a carrier and has an excellent dispersion effect on the CuS active component; as a result, the mercury removal performance can be improved and the mercury removing agent is enabled to have relatively high mercury capacity.

Description

technical field [0001] The invention relates to a method for preparing a mercury removal agent, in particular to a method for preparing a mercury removal agent by using a waste methanol catalyst, and belongs to the technical field of mercury removal. technical background [0002] As we all know, mercury is a toxic substance, because of its cumulative effect in organisms and its difficult to degrade, the problem of mercury pollution has received more and more attention. At present, the mercury in the atmosphere mainly comes from the discharge of coal burning and waste incineration. At the same time, mercury is widely used in industry, such as the release of mercury vapor in the production processes of metallurgy, electronics, and chemical industry. There are three main forms of mercury, which are gaseous elemental mercury (Hg 0 ), oxidized mercury (Hg 2+ ) and particulate mercury (Hg P ), of which particulate mercury (Hg p ) can be removed by particulate control equipment...

AI Technical Summary

Problems solved by technology

In recent years, due to the increasing demand for methanol, the amount of methanol catalyst has also increased significantly. At present, most of the methanol catalysts used in industry are copper-based catalysts based on Cu-Zn-Al series. It is easy to react with sulfur and halogen in the reaction environment to cause problems such as catalyst poisoning and heat aging, which leads to catalyst deactivation, and the deactivated waste methanol catalyst is difficult to regenerate and cannot be reused, which leads to a large amount of waste methanol catalyst. pile up, unmanageable