Nano-zinc base desulfurizing agent selecting oxidized sulfur compound as elemental sulfur and preparation method thereof

Abstract

The invention relates to a nano-zinc base desulfurizing agent selecting an oxidized sulfur compound as elemental sulfur and a preparation method thereof. Along with the industrial development and the improvement of the living standards of people, under a condition at the normal temperature, the discharge amount of sulfur compounds to the environment is increased gradually, and the application range and the demand of a normal-temperature desulfurizing agent is increased continuously. The preparation method of the nano-zinc base desulfurizing agent is characterized by comprising the following steps: using Zn(NO3)2 and Cu(NO3)2 as raw materials and urea as a precipitating agent, namely according to ratios including the mass fraction ratio of between 1:7.26 and 1:60.50 of copper nitrate (Cu(NO3)2.3H2O) to zinc nitrate (Zn(NO3)2.6H2O), and the total mass fraction ratio of between 1:1.31 and 1:5.23 of the urea to two nitrates of (Cu(NO3)2.3H2O and Zn(NO3)2.6H2O), dissolving the Zn(NO3)2.6H2O, the Cu(NO3)2.3H2O and the urea (CO(NH2)2) in water respectively; filtering and mixing the materials; putting the mixed solution into a high-pressure reaction kettle and heating the mixed solution at a temperature of between 100 and 200 DEG C for 1 to 2 hours; filtering and washing the mixture after reaction; drying the mixture at a temperature of between 100 and 200 DEG C for 2 to 3 hours to obtain a precursor; and calcinating the precursor at a temperature of between 260 and 280 DG C for 1 to 2 hours to obtain the nano CuO / ZnO desulfurizing agent. The nano-zinc base desulfurizing agent applies a nano-material to the field of environmental pollution control.

Description

technical field [0001] The invention relates to a preparation method of a nanometer zinc-based desulfurizer which selectively oxidizes sulfides into elemental sulfur. Background technique [0002] With the development of industry and the improvement of people's living standards, the discharge of sulfur-containing compounds to the environment is gradually increasing under normal temperature conditions, and the application range and demand of normal temperature desulfurizers are constantly increasing. [0003] Zinc oxide has high desulfurization precision and requires a wide range of desulfurization process conditions. It is a desulfurizer with good desulfurization performance at medium and high temperatures (200~400°C and 600~700°C), but at low temperatures (less than 200°C) Low desulfurization capacity; desulfurization reaction: ZnO + H 2 S → ZnS + H 2 O, the product is white zinc sulfide ZnS, and ZnS is regenerated into zinc oxide ZnO. If the temperature is too high or to...

AI Technical Summary

Problems solved by technology

[0003] Zinc oxide has high desulfurization precision and requires a wide range of desulfurization process conditions. It is a desulfurizer with good desulfurization performance at medium and high temperatures (200~400°C and 600~700°C), but at low temperatures (less than 200°C) Low desulfurization sulfur capacity; desulfurization reaction: ZnO + H 2 S → ZnS + H 2 O, the product is white zinc sulfide ZnS, and ZnS is regenerated into zinc oxide ZnO. If the temperature is too high or too low, it will cause problems such as sintering of desulfurizer or formation of zinc sulfate, which will reduce the desulfurization ability of zinc oxide and limit its application.