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Desulphurization method for propylene

A technology of propylene and desulfurization agent, applied in the field of propylene desulfurization, which can solve the problems of difficult removal of trace sulfur and complicated desulfurization process

Active Publication Date: 2014-01-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that there are problems in the prior art that the desulfurization process is complicated and trace sulfur is difficult to remove, and a new propylene desulfurization method is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix 1500 grams of water glass (modulus = 2.8) with 500 grams of hexamethyleneimine, and mix 50 grams of sodium aluminate and 25 grams of sodium hydroxide in 500 grams of water. The above two solutions were uniformly mixed under vigorous stirring, and continued to stir for 2 hours, and 500 g of water was added and stirred for 1 hour. The above mixed solution was aged at 10° C. for 100 hours to form a jelly, which was set aside.

[0021] Dissolve 25 grams of sodium aluminate and 20 grams of sodium hydroxide in 500 grams of water and mix evenly, add 500 grams (40% by weight) of silica sol and stir evenly, then add 800 grams of pure water, stir and mix evenly, add the colloid prepared above 50 grams, continue to stir for 2 hours, then transfer to a crystallization kettle, stir and crystallize at 165°C for 100 hours, filter and wash to pH = 7-9, and dry at 150°C. The resulting sample is named M, and its specific surface area is 520 m 2 / g, the pore volume is 0.68 ml / g, and...

Embodiment 2

[0029] Take 50 grams of propylene desulfurizer T1 and place it in a fixed-bed reactor. When the treatment system is guaranteed to be in the liquid phase, that is, the reaction temperature is 5°C and the reaction pressure is 0.7MPa. -1 , continuous treatment for 1000 hours, the performance of the desulfurizer T1 did not decline, and 25 kg of qualified propylene was obtained. The detection of sulfur content in propylene before treatment was 0.9ppm, and the detection of sulfur content at the outlet after treatment was 15ppb.

[0030]

Embodiment 3

[0032] Take 50 grams of propylene desulfurizer T1 and place it in a fixed-bed reactor. When the treatment system is guaranteed to be in the liquid phase, that is, the reaction temperature is 55°C and the reaction pressure is 1.5MPa. -1 , continuous treatment for 1000 hours, the performance of the desulfurizer T1 did not decline, and 100 kg of qualified propylene was obtained. The sulfur content in propylene before treatment was detected to be 1.1ppm, and the sulfur content detected at the outlet after treatment was 21ppb.

[0033]

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PUM

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Abstract

The invention relates to a desulphurization method for propylene, which mainly solves the problem that in the prior art, the desulphurization process is complex and trace sulphur is hard to remove. Due to the adoption of the technical scheme that propylene is in contact with a desulfurizer under the conditions that the reaction temperature is 0-100 DEG C, the pressure of a pressure gauge is 0.2-2.0MPa and the air speed is 0.1-10 h<-1>, the problem is well solved, wherein the desulfurizer comprises the following components in parts by weight: a) 10-90 parts of at least one zeolite selected from ZSM (Zeolite Socony Mobil)-5, ZSM-12, beta zeolite, MCM (Mesoporous Crystalline Material) zeolites, mordenite, faujasite or zeolites with the following XRD (X-Ray Diffraction) data; the zeolite is modified by Cu<2+> and Zn<2+>, so that the content of Na<+> in the zeolite is less than 0.05wt%; and b) 10-90 parts of a mixture of zinc oxide and copper oxide. The method can be used for industrialized production of removing trace sulphur in the propylene.

Description

technical field [0001] The invention relates to a propylene desulfurization method. Background technique [0002] Cumene is an important basic organic raw material and an important intermediate raw material for the production of phenol, acetone and α-methylstyrene. The traditional method of producing cumene in industry has the solid phosphoric acid method (SPA method) of U.S. Universal Oil Company (UOP) and the improved AlCl of Monsanto / Lummus Crest company 3 Law. However, due to strong corrosiveness, heavy pollution and complicated after-treatment of catalysts, they have all been eliminated. [0003] Molecular sieve liquid-phase alkylation method has mild reaction conditions, high conversion rate, good selectivity, less impurities, no pollution, and no corrosion. The main by-product polycumene can be converted into cumene through reverse alkylation, making cumene The production rate is as high as 99%. It is a "clean process" technology with advanced technology and gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/06C07C7/148
Inventor 周斌高焕新魏一伦季树芳
Owner CHINA PETROLEUM & CHEM CORP