Purifier for adsorbing arsenic hydride and hydrogen phosphide in olefin tail gas and preparation method thereof

A purification agent and arsine technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., to achieve low cost of use, simple ingredients, and easy access

Active Publication Date: 2014-08-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are mainly aimed at arsine and phosphine in air, inert gas, and carbon monoxide tail gas, and the treatment methods for arsine and phosphine in olefin tail gas have not been reported yet.

Method used

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  • Purifier for adsorbing arsenic hydride and hydrogen phosphide in olefin tail gas and preparation method thereof
  • Purifier for adsorbing arsenic hydride and hydrogen phosphide in olefin tail gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 4 g of potassium permanganate, 20 g of copper sulfate, 20 g of zinc sulfate, and 356 water to prepare a mixed solution, and then immerse 100 g of activated carbon particles in the prepared mixed solution, and stir at 80° C. for 6 hours. Drying at 180°C for 4 hours under nitrogen protection to obtain the finished product purifying agent. Active components: the mass percentage of potassium permanganate is 2.4%, the mass percentage of copper sulfate is 4.9%, the mass percentage of zinc sulfate is 5.0%; the mass percentage of carrier activated carbon is 87.7%. figure 1 In order to put the purifying agent (2) into a tube with an inner diameter of 25mm and a length of 200mm, the two ends (1) and (3) of the tube are connected by airtight threads. The cracked ethylene gas containing 923 ppb (volume fraction) arsine and 788 ppb (volume fraction) phosphine is passed into the purification tube containing the purifying agent at 100 mL / min. GC-MS monitoring spectrum after 10 ho...

Embodiment 2

[0026] Weigh 2 g of potassium permanganate, 28 g of copper sulfate, 24 g of zinc sulfate, and 346 water to prepare a mixed solution, and then immerse 100 g of activated carbon particles in the prepared mixed solution and stir at 90° C. for 6 hours. Dry at 180°C for 4 hours under nitrogen protection to obtain the finished product purifying agent. Active components: the mass percentage of potassium permanganate is 2.0%, the mass percentage of copper sulfate is 5.7%, the mass percentage of zinc sulfate is 5.2%; the mass percentage of carrier activated carbon is 87.1%. figure 1 In order to put the purifying agent (2) into a tube with an inner diameter of 25mm and a length of 200mm, the two ends (1) and (3) of the tube are connected by airtight threads. The cracked ethylene gas containing 923 ppb (volume fraction) arsine and 788 ppb (volume fraction) phosphine is passed into the purification tube containing the purifying agent at 100 mL / min. GC-MS monitoring spectrum after 10 hours ...

Embodiment 3

[0028] Weigh 4g potassium permanganate, 6g copper nitrate, 8g zinc nitrate, and 182g water to prepare a mixed solution). Then, 100 g of activated carbon particles were immersed in the prepared mixed solution and stirred at 80°C for 6 hours. Drying at 180°C for 4 hours under nitrogen protection to obtain the finished product purifying agent. Active components; the mass percentage of potassium permanganate is 2.9%, the mass percentage of copper nitrate is 4.3%, the mass percentage of zinc nitrate is 4.8%; the mass percentage of carrier activated carbon is 88%. figure 1 In order to put the purifying agent (2) into a tube with an inner diameter of 25mm and a length of 200mm, the two ends (1) and (3) of the tube are connected by airtight threads. Refinery propylene gas containing 1.61 ppm (volume fraction) arsine and 632 ppb (volume fraction) phosphine is passed into the purification pipe containing the purifying agent at 120 mL / min. GC-MS monitoring spectrum after 10 hours of cont...

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Abstract

The invention relates to a normal-temperature purifier for adsorbing arsenic hydride and hydrogen phosphide in an olefin tail gas, belonging to the atmospheric pollution purification field. The purifier comprises following components in percentages by mass: 0.5-5% of potassium permanganate, 1-10% of soluble copper salt, 1-10% of soluble zinc salt and 75-97.5% of active carbon; the active carbon is a carrier; the potassium permanganate, and the soluble copper salt and the soluble zinc salt are active components. The preparation method of the purifier comprises following steps: (1), preparing a mixed water solution of the potassium permanganate, the soluble copper salt and the soluble zinc salt; (2), loading the potassium permanganate, the soluble copper salt and the soluble zinc salt on the active carbon carrier by a dipping method to obtain a carrier loaded with active metals; and (3), drying the carrier loaded with active metals in a drying medium to obtain the finished product purifier. The purifier disclosed by the invention has the advantages of simple component, low cost and low usage cost; after the purification, the content of arsenic hydride and hydrogen phosphide is less than 10ppb (volume percentage).

Description

Technical field [0001] The invention relates to the field of air pollution purification, in particular to a purifying agent for removing arsine and phosphine gas from olefin tail gas during production or experiment through chemical adsorption. Background technique [0002] my country's crude oil imported from Russia and Central Asia contains high levels of arsenic and is found to contain phosphides. The content of arsenic and phosphide in crude oil from Daqing and Xinjiang is generally higher. With the continuous deepening of crude oil exploitation, the impurity content in oil products, especially arsenic and phosphide, is increasing year by year. On the other hand, the changes in crude oil in domestic refineries, the improvement of deep processing technology and the continuous improvement of processing capacity have resulted in the presence of arsenic and phosphorus in different refining products. Products obtained from secondary processing of high-arsenic and phosphorous oil ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/86B01D53/52B01D53/46B01J23/889
Inventor 陈松宋阳张颖
Owner CHINA PETROLEUM & CHEM CORP
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