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Zinc oxide desulfurizing agent and preparation method thereof

A technology of zinc oxide and desulfurizer, applied in chemical instruments and methods, separation methods, combustible gas purification, etc., can solve the problems of small specific surface area, unsafe for people and the environment, low sulfur capacity, etc., and achieve good high temperature stability, Wide range of applications and the effect of increasing sulfur capacity

Inactive Publication Date: 2016-11-23
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sulfur capacity of the desulfurizer disclosed in the above technology is only 10wt%-20wt%, and the specific surface area is only 80m 2 / g-180m 2 / g, there are defects of low sulfur capacity and small specific surface area
Moreover, in the process of preparing the above-mentioned desulfurizer, it is necessary to use nitric acid or hydrochloric acid for acidification, but nitric acid or hydrochloric acid is a strong acid, which is not safe for people and the environment

Method used

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  • Zinc oxide desulfurizing agent and preparation method thereof

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Embodiment 1

[0042] This embodiment provides a zinc oxide desulfurizer and a preparation method thereof. The zinc oxide desulfurizer includes an alumina-titania composite carrier and ZnO and B supported thereon 2 o 3 , among them, ZnO, B 2 o 3 The mass ratio of alumina-titania composite carrier is 40:4:50.

[0043] Correspondingly, the preparation method of the zinc oxide desulfurizer comprises the following steps:

[0044] 1) Preparation of alumina-titania composite carrier:

[0045] S1, aluminum chloride and titanium tetrachloride are dissolved in deionized water in the enamel tank, then add polyethylene glycol accounting for 0.2% of the total mass of aluminum chloride and titanium tetrachloride; after completely dissolving, Then add ammonia water with a volume fraction of 30% to it at a rate of 3 drops / 2s to ensure that the molar ratio of aluminum chloride, titanium tetrachloride and ammonia water is 2:1:3.5, stir at 55°C for 3 hours, and then statically Place and age for 1h, collec...

Embodiment 2

[0052] This embodiment provides a zinc oxide desulfurizer and a preparation method thereof. The zinc oxide desulfurizer includes an alumina-titania composite carrier and ZnO and B supported thereon 2 o 3 , among them, ZnO, B 2 o 3 The mass ratio of alumina-titania composite carrier is 30:6:40.

[0053] Correspondingly, the preparation method of the zinc oxide desulfurizer comprises the following steps:

[0054] 1) Preparation of alumina-titania composite carrier:

[0055] S1, aluminum chloride and titanium tetrachloride are dissolved in deionized water in the enamel tank, then add 0.2% EDTA accounting for the total mass of aluminum chloride and titanium tetrachloride; Add dropwise ammonia water with a volume fraction of 25% to it at a rate of drop / 2s to ensure that the molar ratio of aluminum chloride, titanium tetrachloride and ammonia water is 1.5:1:3, stir at 50°C for 4 hours, and then stand for aging 1h, collect sediment;

[0056] S2, using conductivity less than 10...

Embodiment 3

[0062] This embodiment provides a zinc oxide desulfurizer and a preparation method thereof. The zinc oxide desulfurizer includes an alumina-titania composite carrier and ZnO and B supported thereon 2 o 3 , among them, ZnO, B 2 o 3 The mass ratio of alumina-titania composite carrier is 50:5:60.

[0063] Correspondingly, the preparation method of the zinc oxide desulfurizer comprises the following steps:

[0064] 1) Preparation of alumina-titania composite carrier:

[0065] S1, aluminum chloride and titanium tetrachloride are dissolved in deionized water in the enamel tank, then add 0.4% isopropane accounting for the total mass of aluminum chloride and titanium tetrachloride; Add ammonia water with a volume fraction of 35% to it at a rate of 3 drops / 2s to ensure that the molar ratio of aluminum chloride, titanium tetrachloride and ammonia water is 2.5:1:2.5, stir at 60°C for 2 hours, and then let stand After 0.5h, the precipitate was collected;

[0066] S2, using conducti...

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Abstract

The invention discloses a zinc oxide desulfurizing agent and a preparation method thereof. The zinc oxide desulfurizing agent comprises a carrier and active components, wherein the carrier is an aluminum oxide-titanium oxide composite carrier, and the active components are ZnO and B2O3. The preparation method includes the steps of firstly, mixing a zinc compound, boric acid, the aluminum oxide-titanium oxide composite carrier and a binding agent for forming to obtain a formed material, wherein the zinc compound is zinc oxide and / or zinc carbonate; secondly, sequentially drying and calcining the formed material to obtain the zinc oxide desulfurizing agent. The zinc oxide desulfurizing agent has the advantages that under the air speed of 3500h-1 and reaction temperature of 350 DEG C, the desulfurization efficiency of the zinc oxide desulfurizing agent can reach below 0.05ppm, sulfur capacity can reach up to 27.3%, sulphureted hydrogen can be removed, a conversion and absorption effect on organic sulfur such as carbonyl sulfide, mercaptan and thiophene is achieved, and the zinc oxide desulfurizing agent is applicable to high air speed, good in high temperature stability and stable in outlet precision.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of desulfurizing agents, and in particular relates to a zinc oxide desulfurizing agent and a preparation method thereof. Background technique [0002] The process of using coal as raw material to prepare downstream products of coal chemical industry is mainly to first gasify coal to produce coal-based gas, then use coal-based gas as raw material, and synthesize downstream products of coal chemical industry under the action of catalysts, such as methanol, low-carbon alcohol, distillate, etc. Methyl ether and low carbon hydrocarbons, etc. However, coal contains a large amount of sulfur, which in turn causes the coal gas produced from it to contain organic sulfur such as carbonyl sulfide and mercaptan and inorganic sulfur such as hydrogen sulfide, and these organic sulfur and inorganic sulfur will cause the catalyst used in the synthesis process to lose Live, so must be removed b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/32C10K1/20B01D53/81B01D53/48B01D53/52
CPCC10K1/004B01D53/48B01D53/485B01D53/52B01D53/81B01D2251/602B01D2257/304B01D2257/306C10K1/205C10K1/32
Inventor 刘晓龙刘聪徐龙倪雪梅
Owner SHENYANG SANJUKAITE CATALYST
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