Low-temperature fine desulfurizer and its preparation method

Abstract

The invention relates to a low-temperature fine desulfurizer and its preparation method. Raw materials for preparing the fine desulfurizer are consisting of, by weight, 40-60% of basic zinc carbonate, 15-25% of copper carbonate and at least one component selected from 0-10% of a pore forming agent, 0-10% of a binder and 5-10% of an extrusion aid. The fine desulfurizer is characterized by containing 20-30 wt% of a waste agent which can enhance catalyst strength and simplify the preparation technology. In addition, the preparation raw materials also contain 0-10 wt% of a lubricant which can raise binding performance of the materials. The method comprises the following steps of: uniformly mixing the above materials, adding 5-10 wt% of the extrusion aid, kneading for molding, and drying at 100-120 DEG C for 3-4 hours to obtain the fine desulfurizer used at low temperature. The low-temperature fine desulfurizer is applicable to fine desulphurization of industrial gases such as natural gas, oil-associated gas, refinery flares, coal gas and the like.

Description

technical field [0001] The invention specifically relates to a low-temperature and high-precision desulfurizer, which belongs to the technical field of desulfurizers. Background technique [0002] Most of the feedstock gases used in industrial production such as synthetic ammonia, oil refinery hydrogen production and synthetic methanol are natural gas, petroleum associated gas, refinery waste gas, coal-to-gas and other industrial gases. Since these gases contain a large amount of sulfur, they are In the process, the catalyst used will be poisoned and deactivated due to the presence of sulfur, which will affect the catalytic performance of the catalyst and lead to a decrease in industrial production efficiency. Therefore, it is necessary to remove the sulfur content in the raw gas to a very low level before industrial production Avoid its influence on catalyst performance as much as possible. [0003] As far as the current domestic fine desulfurization technology is conc...

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned technology, because the surface of the basic zinc carbonate and copper carbonate materials is not smooth, in the process of preparing the fine desulfurizer, due to the rough surface of the material, the degree of lubrication between the components of the fine desulfurizer formed after kneading is reduced, which is manifested as The surface bonding force between the materials is low, it is difficult to realize the physical combination of the material surface through kneading, which in turn affects the molding effect of the fine desulfurizer, and the prepared fine desulfurizer has poor molding uniformity and uneven distribution of pores

[0007] In addition, in the process of preparing the fine desulfurizer, in order to increase the strength of the fine desulfurizer, it is necessary to add alumina cement, but after adding alumina cement, in order to fully nourish and activate it and other desulfurization active components, it is necessary to In order to obtain a good desulfurization effect, at least 48 hours of health preservation should be carried out on the formed fine desulfurizer. Since the various processes in industrial production are interlocking, increasing the steps of health preservation will increase production. cycle, and stacking a large number of semi-finished products somewhere will take up space, so the increase of this step will increase the cost of time and space in the production process, which is not conducive to the industrialization of products