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

A technology of selective oxidation and base desulfurization agent, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., can solve the problems of zinc oxide desulfurization ability reduction, high precision of zinc oxide desulfurization, desulfurization agent sintering, etc., to achieve sulfur capacity Increase, increase sulfur capacity, increase the effect of sulfur capacity

Inactive Publication Date: 2010-01-13
HEILONGJIANG INST OF TECH
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  • Abstract
  • Description
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  • Application Information

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 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.

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0019] The nanometer CuO / ZnO desulfurizer has the best desulfurization performance when the mass fraction ratio of CuO and ZnO is 1:18.63.

[0020] Preparation of nano CuO / ZnO desulfurizer:

[0021] Copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) and zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O) The ratio of parts by mass is 1:22.26, urea and two kinds of nitrates (Cu(NO 3 ) 2 ·3H 2 O and Zn(NO 3 ) 2 ·6H 2 O) the total mass fraction ratio is a ratio of 1: 4.03, Zn(NO 3 ) 2 ·6H 2 O, Cu(NO 3 ) 2 ·3H 2 O and urea (CO(NH 2 ) 2 ) were dissolved in water respectively, filtered and mixed, the mixture was put into a high-pressure reactor, heated to 110°C for 1 hour, and the reaction mixture was filtered, washed, and dried at 120°C for 2 hours to obtain a precursor. ℃ roasting for 2 hours to prepare nano CuO / ZnO desulfurizer.

Embodiment 2

[0023] The nanometer zinc-based desulfurizer CuO / ZnO, which selectively oxidizes sulfur-containing compounds to elemental sulfur, consists of copper oxide (CuO) and zinc oxide (ZnO), with a mass-number ratio of 1:6.07. It is characterized in that: copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) and zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O) as the raw material, urea as the precipitant, that is, copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) and zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O) The ratio of parts by mass is 1:7.26, urea and two kinds of nitrates (Cu(NO 3 ) 2 ·3H 2 O and Zn(NO 3 ) 2 ·6H 2 O) the total mass fraction ratio is a ratio of 1: 4.03, Zn(NO 3 ) 2 ·6H 2 O, Cu(NO 3 ) 2 ·3H 2 O and urea (CO(NH 2 ) 2 ) were dissolved in water respectively, filtered and mixed, the mixture was put into a high-pressure reactor, heated to 110°C for 1 hour, and the reaction mixture was filtered, washed, and dried at 120°C for 2 hours to obtain a precursor. ℃ roasting for 2 hours to prepare nano CuO...

Embodiment 3

[0025] The composition includes copper oxide (CuO) and zinc oxide (ZnO), and the ratio of parts by mass is 1:50.62. It is characterized in that: copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) and zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O) as the raw material, urea as the precipitant, that is, copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) and zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O) The ratio of parts by mass is 1:60.50, urea and two kinds of nitrates (Cu(NO 3 ) 2 ·3H 2 O and Zn(NO 3 ) 2 ·6H 2 O) the total mass fraction ratio is a ratio of 1: 4.03, Zn(NO 3 ) 2 ·6H 2 O, Cu(NO 3 ) 2 ·3H 2 O and urea (CO(NH 2 ) 2) were dissolved in water respectively, filtered and mixed, the mixture was put into a high-pressure reactor, heated to 110°C for 1 hour, and the reaction mixture was filtered, washed, and dried at 120°C for 2 hours to obtain a precursor. ℃ roasting for 2 hours to prepare nano CuO / ZnO desulfurizer.

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Abstract

The invention relates to a method for preparing a nano-zinc base desulfurizing agent which selects to oxide a sulfur compound as an elemental sulfur. 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 invention takes zinc nitrate hexahydrate and copper nitrate trihydrate as raw materials, urea as a precipitating agent, namely ratios of the copper nitrate trihydrate and the zinc nitrate hexahydrate being 1:7.26-1:60.50, and the total mass portion ratios of the urea and the two nitrates being 1:1.31-1:5.23. The zinc nitrate hexahydrate, the copper nitrate trihydrate and the urea are respectively solved in water to prepare three solutions. The three solutions are mixed after the solutions are filtered. The mixed liquid is put in an autoclave and heated to 100-120 DEG C for reacting for 1-2h. The mixture is filtered after reaction, and cleaned. A precursor is obtained after drying at 100-120 DEG C for 2-3h. The nano-zinc base desulfurizing agent is prepared after the precursor is roasted at 260-280 DEG C for 1-2h. 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 nanometer zinc-based desulfurizer for selectively oxidizing sulfide-containing compounds into elemental sulfur and a preparation method thereof. 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 tempe...

Claims

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Application Information

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IPC IPC(8): B01D53/50
Inventor 邵纯红王路武鹤
Owner HEILONGJIANG INST OF TECH
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