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Purificant for adsorbing arsine and phosphorane in olefin tail gas and preparation method for purificant

A cleaning agent and exhaust gas technology, applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, to achieve the effects of simple ingredients, easy access, and low cost of use

Active Publication Date: 2012-12-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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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  • Purificant for adsorbing arsine and phosphorane in olefin tail gas and preparation method for purificant
  • Purificant for adsorbing arsine and phosphorane in olefin tail gas and preparation method for purificant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 3g of potassium permanganate, 8g of ferric sulfate, 8g of lead sulfate, and 181g of water to prepare a mixed solution, then immerse 100g of activated carbon particles in the prepared mixed solution, and stir at 90°C for 6 hours. Dry at 180° C. for 5 hours under nitrogen protection conditions to obtain the finished cleaning agent. Active components: the mass percentage of potassium permanganate is 2.8%, the mass percentage of iron sulfate is 4.2%, the mass percentage of lead sulfate is 4.2%; the mass percentage of the carrier is 88.8%. figure 1 Be 25mm in the pipe of long 200mm for cleaning agent (2) is packed into, and pipe two ends (1), (3) are airtight screw connection. Cracked ethylene gas containing 923ppb (volume fraction) arsine and 788ppb (volume fraction) phosphine was passed into the purification tube filled with cleaning agent at 100mL / min. GC-MS monitoring spectrum after continuous purification for 10 hours figure 2 , indicating that arsine and phosp...

Embodiment 2

[0027] Weigh 3.6g of potassium permanganate, 10g of ferric sulfate, 14g of lead sulfate, and 173g of water to prepare a mixed solution, then immerse 100g of activated carbon particles in the prepared mixed solution, and stir at 100°C for 6 hours. Dry at 180° C. for 5 hours under nitrogen protection conditions to obtain the finished cleaning agent. Active components: the mass percentage of potassium permanganate is 3.0%, the mass percentage of iron sulfate is 4.2%, the mass percentage of lead sulfate is 5.5%; the mass percentage of carrier is 87.3%. figure 1 Be 25mm in the pipe of long 200mm for cleaning agent (2) is packed into, and pipe two ends (1), (3) are airtight screw connection. Cracked ethylene gas containing 923ppb (volume fraction) arsine and 788ppb (volume fraction) phosphine was passed into the purification tube filled with cleaning agent at 100mL / min. GC-MS monitoring spectrum after continuous purification for 10 hours figure 2 , indicating that arsine and phos...

Embodiment 3

[0029] Weigh 4.0g of potassium permanganate, 12g of ferric nitrate, 8g of lead nitrate, and 176g of water to prepare a mixed solution, then immerse 100g of activated carbon particles in the prepared mixed solution, and stir at 100°C for 6 hours. Dry at 180° C. for 5 hours under nitrogen protection conditions to obtain the finished cleaning agent. Active components: the mass percentage of potassium permanganate is 3.2%, the mass percentage of ferric nitrate is 5.1%, the mass percentage of lead nitrate is 4.9%; the mass percentage of carrier is 87.8%. figure 1 Be 25mm in the pipe of long 200mm for cleaning agent (2) is packed into, and pipe two ends (1), (3) are airtight screw connection. The refinery propylene gas containing 1.61ppm (volume fraction) arsine and 632ppb (volume fraction) phosphine is passed into the purification pipe containing the cleaning agent at 120mL / min. GC-MS monitoring spectrum after continuous purification for 10 hours figure 2 , indicating that arsin...

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Abstract

The invention relates to normal-temperature purificant for adsorbing arsine and phosphorane in olefin tail gas, and is used for the field of purification for atmospheric pollution. The purificant comprises, in mass percent, from 1% to 5% of potassium permanganate, from 2% to 9% of soluble ferric salt, from 1% to 8% of soluble lead salt and from 78% to 96% of activated carbon, wherein the activated carbon is a carrier; and the potassium permanganate, the soluble ferric salt and the soluble lead salt are active components. A preparation method for the purificant comprises the following process steps of (1) preparing the potassium permanganate, the soluble ferric salt and the soluble lead salt into aqueous solution; (2) loading the potassium permanganate, the soluble ferric salt and the soluble lead salt onto the activated carbon carrier by using an impregnating method so as to obtain a loaded active metal carrier; and (3) drying the loaded active metal carrier in a dry medium so as to obtain the finished purificant. The purificant has the advantages of simple ingredients, low price and low using cost. After the olefin tail gas is purified by the purificant, the content of the arsine and the content of the phosphorane are lower than 10ppb (volume fraction).

Description

technical field [0001] The invention specifically relates to a cleaning agent for removing arsine and phosphine gases harmful to human body in olefin tail gas in industrial production or experiment process through chemical adsorption, and the invention belongs to the field of air pollution purification. Background technique [0002] Hydrides (such as arsine, phosphine, etc.) are highly toxic substances to the human body. Medical toxicology studies have shown that adults who inhale 250ppm of arsine and phosphine will die quickly, while those exposed to 30ppm of arsine and phosphine It can also be fatal in 30 minutes. Long-term exposure to 10ppm arsine and phosphine can also be fatal. Symptoms of poisoning will appear after exposure to 0.5ppm arsine and phosphine. According to the national environmental protection standard, the maximum allowable concentration of arsine and phosphine in the environment is 5×10 -8 . [0003] Continental oil-forming oils contain relatively hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/04
Inventor 陈松宋阳张颖
Owner CHINA PETROLEUM & CHEM CORP
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