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Preparation method for load type iron-based sulfureted hydrogen removal agent under room temperature

A technology of normal temperature loading and hydrogen sulfide, which is applied in the field of desulfurizers and can solve the problems of poor reproducibility of granular products

Active Publication Date: 2012-06-13
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of a normal temperature load-type iron-based hydrogen sulfide removal agent, the preparation conditions of the method are highly controllable, easy to operate, overcome the shortcomings of poor reproducibility of granular products, the conversion of iron salts is complete, The active material is evenly loaded and activated by vulcanization to improve the activity of the desulfurizer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Use attapulgite as the carrier, make it into a slurry with water, the solid-to-liquid ratio is 1:2, add NaOH to adjust the pH value of the solution slurry to 12, soak and activate for 10 hours, separate the attapulgite by centrifugation, wash with distilled water and centrifuge The product was separated, and the centrifuge was dried at a temperature of 100°C for 2 hours to obtain the alkali-activated carrier attapulgite. Add the alkali-activated carrier attapulgite to 0.4M ferric chloride solution, the solid-to-liquid ratio is 1:5, add urea according to the ratio of ferric chloride salt to urea is 1:10, stir, reflux, and control the reaction temperature React at 100°C for 4 hours, centrifuge to separate the product, and wash until free of Cl - , and then dried the centrifuge at 100°C for 2 hours, and fired at 300°C for 3 hours to obtain the iron-based load. The iron-based load is put into a fixed-bed reactor with a bed height of 5 cm, and a mixed gas with a volume flow...

Embodiment 2

[0022] Using clay as a carrier, make it into a slurry with water, the solid-to-liquid ratio is 1:5, add NaOH to adjust the pH value of the slurry to 10, soak and activate for 24 hours, separate the clay by centrifugation, wash with distilled water and then centrifuge to separate the product, 100 Centrifuge was dried for 2 hours to obtain alkali-activated carrier clay. Add alkali-activated carrier clay to 0.1M ferric sulfate solution, the solid-to-liquid ratio is 1:40, add urea according to the ratio of ferric sulfate to urea is 1:4, stir, reflux, control the reaction temperature at 80°C, and react After 4 hours, the product was separated by centrifugation and washed to be free of SO 4 2- , dry the centrifuge at 100°C for 2 hours, and burn at 400°C for 2 hours to obtain the iron-based load. The iron-based load is put into a fixed-bed reactor with a bed height of 50 cm, and a mixed gas with a volume flow rate of 30 ml / min is introduced at room temperature for 1 hour to obtain ...

Embodiment 3

[0024] Use diatomaceous earth as a carrier, make it into a slurry with water, the solid-to-liquid ratio is 1:10, add NaOH to adjust the pH value of the solution to 11, soak and activate for 15 hours, separate the diatomite by centrifugation, wash with distilled water and then centrifuge The product was produced, and the centrifuge was dried at 100° C. for 2 hours to obtain diatomaceous earth as an alkali-activated carrier. Add the alkali-activated carrier diatomaceous earth to 1M ferric nitrate solution, the solid-to-liquid ratio is 1:50, add urea according to the ratio of iron salt to urea 1:10, stir, reflux, control the reaction temperature at 110°C, and react After 10 hours, the product was separated by centrifugation and washed until no NO 3 - , dry the centrifuge at 100°C for 2 hours, and burn at 600°C for 1 hour to obtain the iron-based load. Put the iron-based load product into a fixed-bed reactor with a bed height of 10 cm, and pass a mixed gas with a volume flow rate ...

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PUM

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Abstract

The invention discloses a preparation method for a load type iron-based sulfureted hydrogen removal agent under room temperature. The preparation method comprises first preparing alkali activation carrier clay, preparing slurry by utilizing the clay and water, adding NaOH to adjust the potential hydrogen (pH) value of solution, then performing dipping and activation to obtain the clay by means of centrifugal separation, cleaning the clay with distilled water and obtaining centrifugal objects by means of the centrifugal separation, and drying the centrifugal objects to obtain the alkali activation carrier clay; then depositing iron by means of homogeneous precipitation, adding the alkali activation carrier clay into molysite solution, adding urea and stirring the solution, reflowing the solution, controlling reaction temperature and reaction time, then obtaining a product by means of the centrifugal separation, cleaning the product till the product has no counter ion, then drying the product, burning the product to obtain an iron-based carrier object; and finally performing sulfuration and activation, placing the iron-based load object into a fixed bed reactor of a bed layer, and feeding mixed gas under the room temperature to obtain a final sulfureted hydrogen removal agent. The preparation method for the load type iron-based sulfureted hydrogen removal agent under the room temperature effectively controls load quantity and improves conversion rate of metal salt and utilization efficiency of urea; active maters are dispersed well in a carrier, and the preparation method can improve mass transfer rate and has a good function of sulfureted hydrogen removal under the room temperature.

Description

technical field [0001] The invention relates to a desulfurizer, in particular to a preparation method of a normal-temperature load-type hydrogen sulfide remover. Background technique [0002] All kinds of reactions involving sulfur compounds may generate hydrogen sulfide. Hydrogen sulfide in industry mainly exists in gas processing industries such as oil refineries, natural gas purification plants, and coal gas purification plants. Among them, hydrogen sulfide accounts for more than 90% of sulfides. It is highly corrosive, which not only causes corrosion of equipment and pipelines, but also poisons catalysts and seriously endangers human health. At present, there are many kinds of methods for removing hydrogen sulfide, which can be divided into two categories: dry method and wet method according to the desulfurization method. The traditional wet desulfurization technology is relatively mature, can be carried out at low temperature or normal temperature, and has the characte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/48B01J20/12B01J23/745
Inventor 张智宏梁慧军杜晓刚左晓亮
Owner CHANGZHOU UNIV
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