Normal temperature de-arsenic agent

A technology for removing arsenic at room temperature, applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of low arsenic capacity and low arsenic removal efficiency of the arsenic removal agent, and achieve high arsenic removal efficiency, large specific surface area, and enhanced dispersion Effect

Active Publication Date: 2009-07-22
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
View PDF2 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] What the present invention aims to solve is the problem of low arsenic capacity and low arsenic removal efficiency of the prior art arsenic removal agent, and further provides a room temperature arsenic removal agent with high arsenic capacity, especially manganese dioxide and ferric oxide as the main Normal temperature arsenic removal agent with arsenic removal active component

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Mix 32kg of ferrous sulfate powder and 12kg of sodium hydroxide uniformly, wherein the molar ratio of iron to hydroxide is 1:2.8; put the above mixture into a kneader and knead for 3 hours to complete the solidification between the above reactants Instead, the above reaction product is then placed in the air to dry, so as to facilitate the full completion of the above reaction.

[0018] The air-dried material is first stirred with water, and washed repeatedly until the obtained filtrate is free of sulfate (usually tested with barium chloride), and the washing liquid is filtered using a centrifuge.

[0019] The above-mentioned solid after washing and filtering is dried, the drying temperature is 80 DEG C, and the drying time is 3 hours to prepare amorphous iron oxyhydroxide. The above-mentioned amorphous iron oxyhydroxide is calcined at 320°C for 6 hours to obtain ferric oxide.

[0020] Weigh 20 kg of manganese dioxide prepared by roasting manganese carbonate at 320°C in the...

Embodiment 2

[0022] Mix 64kg of ferrous sulfate powder and 21.2kg of sodium hydroxide uniformly, in which the molar ratio of iron to hydroxide is 1:2.4; put the above mixture into a kneader and knead for 0.5h to complete the reaction between the above-mentioned reactants. After the solid-phase reaction, the above-mentioned reaction product is placed in the air to dry.

[0023] The air-dried material is first stirred with water, and washed repeatedly until the obtained filtrate is free of sulfate (usually tested with barium chloride), and the washing liquid is filtered using a centrifuge.

[0024] The above-mentioned solid after washing and filtering is naturally dried at a drying temperature of -5°C and a drying time of 10 hours to obtain amorphous iron oxyhydroxide. The above amorphous iron oxyhydroxide is calcined at 330°C for 5.5 hours to obtain ferric oxide.

[0025] Weigh 55 kg of manganese dioxide prepared by roasting manganese carbonate at 330°C in the presence of water vapor, 35 kg of ...

Embodiment 3

[0027] Mix 34.2 kg of ferrous nitrate powder and 23.4 kg of potassium hydroxide uniformly, in which the molar ratio of iron to hydroxide is 1:2.0; put the above mixture into a kneader and knead it for 1.0 h to complete The solid-phase reaction between the two, and then the above-mentioned reaction product is placed in the air to dry.

[0028] The air-dried material is first stirred with water, and washed repeatedly until the obtained filtrate is free of sulfate (usually tested with barium chloride), and the washing liquid is filtered using a centrifuge.

[0029] The above-mentioned solid after washing and filtering is naturally dried, the drying temperature is 45 DEG C, and the drying time is 3 hours, then amorphous iron oxyhydroxide can be obtained. The above-mentioned amorphous iron oxyhydroxide is calcined at 340°C for 5 hours to obtain ferric oxide.

[0030]Weigh 55 kg of manganese dioxide prepared by roasting manganese carbonate at 340°C in the presence of water vapor, 10 kg ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a normal temperature dearsenifying agent, which consists of active components and a carrier, wherein the carrier is clay; and the active components comprise manganese dioxide and ferric oxide. Particularly, the dearsenifying agent consists of the following components in percentage by weight: 20 to 55 weight percent of manganese dioxide, 10 to 45 weight percent of ferric oxide, and 10 to 35 weight percent of the carrier. Based on the dearsenifying agent, the invention further discloses a method for preparing the dearsenifying agent, and the dearsenifying agent prepared by the method has higher arsenic capacity.

Description

Technical field [0001] The invention relates to a room temperature dearsenic agent with high arsenic capacity, and belongs to the technical field of dearsenic purification. Background technique [0002] In recent years, with the rapid development of my country's coal chemical technology, a new process of using coal-water slurry to pressurize gasification to synthesize ammonia has been introduced. Since the raw coal used contains arsenide, there will be a trace amount of arsenide in the synthesis gas, which leads to permanent poisoning of the subsequent cobalt-molybdenum sulfur-tolerant shift catalyst during the ammonia synthesis process. Similarly, arsenic will also exist in the deep processing of petrochemical industries, and its presence will also cause the poisoning of many catalysts used in the process. Because arsenic has a strong ability to bind the active components of the catalyst, and its damage to the catalyst is irreversible and permanent poisoning. Therefore, in the p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/30
Inventor 冯续蒲延芳闻学兵王宏伟刘彦芳
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap