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A method for removing hydrogen sulfide in the product of dehydrogenation unit

A technology of hydrogen sulfide and activation method, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as unsuitable use, environmental pollution, activated carbon dust pollution, etc.

Active Publication Date: 2014-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, activated carbon is prone to dust and other waste residue pollution, and alkaline liquid is prone to produce a large amount of industrial waste liquid, both of which will cause pollution to the environment
At the same time, due to the particularity of the dehydrogenation of low-carbon alkanes to low-carbon olefins, the above-mentioned existing technologies are not suitable for use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] The dehydrogenation catalyst can be prepared by a conventional method, such as using an impregnation method to support the dehydrogenation active metal, and the auxiliary agent can be introduced during the preparation of the alumina carrier and / or by an impregnation method.

[0017] The catalyst of the present invention uses Sn-containing alumina as a carrier, and the dehydrogenation active metal component is generally selected from one or more of platinum, palladium, iridium, rhodium or osmium in the platinum group, and the amount is calculated as the weight of the carrier in terms of simple substance. 0.01%~2%. The content of Sn is 0.1%~10% of the weight of the carrier in terms of simple substance.

[0018] In the dehydrogenation catalyst with Sn-containing alumina as the carrier of the present invention, Sn is introduced into the Sn-containing material when the alumina is gelled, and then made into a carrier.

[0019] In the dehydrogenation catalyst with Sn-containi...

example 1

[0037] Preparation of Sn-containing alumina support. After mixing a certain amount of 0.98M aluminum trichloride solution and 0.01M tin tetrachloride solution, add a certain amount of 8% ammonia water, mix evenly in a neutralization tank at 60~80°C, and control the pH value from 7.0~ 9.0, after filtering, washing with water and acidifying, pressurize into spheres in an oil ammonia column, dry, age, and roast at 650°C for 4 hours to obtain alumina spheres containing 0.3wt% Sn.

[0038] The alumina pellet carrier containing 0.3wt% Sn was calcined at 800°C for 3h, the calcined carrier was immersed in an aqueous solution containing chloroplatinic acid for 6h at 70°C, dried at 120°C for 2h, and calcined at 500°C for 4h. Dechlorination in air containing 20v% water vapor at 450°C for 4h. Then at 70 °C with KNO 3 Soaked in aqueous solution for 2h, dried and roasted under the same conditions without reduction. The loading amount of each component in the catalyst is: Pt 0.5wt%, Sn 0....

example 2

[0049] Preparation of Sn-containing alumina support. After mixing a certain amount of 1.08M aluminum trichloride solution and 0.01M tin tetrachloride solution, add a certain amount of 10% ammonia water, mix evenly in a neutralization tank at 60~80°C, and control the pH value of 7.0~ 9.0, after filtering, washing with water and acidifying, pressurize into spheres in an oil ammonia column, dry, age, and roast at 700°C for 4 hours to obtain alumina spheres containing 1.0wt% Sn.

[0050] The alumina pellet carrier containing 1.0wt% Sn was calcined at 800°C for 3h, the calcined carrier was immersed in an aqueous solution containing chloroplatinic acid for 4h at 70°C, dried at 120°C for 2h, and calcined at 500°C for 4h. Dechlorination in air containing 20v% water vapor at 450°C for 4h. Then at 70 °C with KNO 3 Soaked in aqueous solution for 2h, dried and roasted under the same conditions without reduction. The loading of each component in the catalyst is: Pt 0.7wt%, Sn 1.0wt%, K ...

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Abstract

The invention discloses a method for removing hydrogen sulfide in the product of a dehydrogenation device. After the dehydrogenation reactor, a hydrogen sulfide removal reactor is added, which is filled with hydrogen sulfide removal substances; The method of filling the bed layer of hydrogen sulfide removal substance under the hydrogen catalyst bed is realized to remove hydrogen sulfide gas; the hydrogen sulfide removal substance is one of zinc oxide, copper oxide, calcium ferrite and iron oxide species or several. The method of the invention can simply and effectively remove the hydrogen sulfide in the dehydrogenation product of the dehydrogenation device, and reduce the complexity of the treatment of the catalytic dehydrogenation reaction product.

Description

Technical field [0001] The present invention is about the removal method of hydrogen sulfide gas in the tail gas of a low -carbon alkanane hydrogenation device. Background technique [0002] In recent years, with the rapid development of the global petrochemical industry, demand for low -carbon olefins has also increased.Low -carbon alkyl catalytic dehydrogenation technology is an effective way to increase the production of C3 ~ C4 olefin.At present, the world's low-carbon alkanidine dehydrogenation patented technology includes: UOP's Oleflex technology, ABB Rames's Catofin technology, UHDE's Star process, Snamprogetti / Yarsintz's FBD-4 technology, Linde / BASF's PDH process.Among the construction devices, most of the former Soviet Union adopted FBD-4 processes, and Catofin and Oleflex technologies have become the leading crafts adopted in new devices.The Oleflex process is mainly PT -based catalysts, and the CATAFIN process is mainly CR 2 O 3 / Al 2 O 3 Mainly. [0003] Platinum loa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/88B01D53/52B01D53/46
Inventor 王振宇张海娟李江红张喜文宋喜军孙潇磊
Owner CHINA PETROLEUM & CHEM CORP
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