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Method for removing thiophene in coking benzene

A technology for coking benzene and thiophene, applied in chemical instruments and methods, bulk chemical production, chemical/physical processes, etc., can solve problems such as inability to coke benzene and thiophene removal, waste of acid solution, secondary pollution, etc., and achieve the application method Simple, environmentally friendly, and low-cost effects

Inactive Publication Date: 2016-07-06
JIANGSU SHIKONG COATING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the fact that the current pickling method cannot completely remove thiophene in coked benzene, the efficiency is low, a large amount of acid solution is wasted, and it is easy to cause secondary pollution, and a metal catalyst in preparation is provided. Under the catalysis and methane assistance, it is catalyzed into hydrogen sulfide, then oxidized by ozone, catalyzed into sulfur dioxide, and finally hydrogen sulfide and sulfur dioxide are catalyzed into sulfur under the action of a metal catalyst. Under the second catalysis, the present invention The removal efficiency is high, and the thiophene content in coking benzene can be removed to below 0.8ppm. At the same time, during the removal process, it will not cause secondary pollution and protect the environment.

Method used

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Examples

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Effect test

example 1

[0017] Al first 2 o 3 with MgCl 2 After mixing at a mass ratio of 1:1, add oxalic acid solution with a mass fraction of 20% of the mass of the mixture to 30% and deionized water with a mass fraction of 10% of the mass of the mixture, stir it evenly, and add 30% of the mass fraction to it Sodium hydroxide solution, after adjusting its pH value to 6.5, it is filtered, and the filtered material is placed in an oven with a temperature of 80 ° C for 1 hour to obtain a carrier mixture; nickel nitrate is decomposed into nickel oxide by nitrogen radio frequency, The radio frequency frequency of nitrogen is 5MHz, and then add dilute hydrochloric acid solution with 20% nickel oxide mass to it, stir slowly at a speed of 80r / min, and after stirring for 40min, an impregnating solution is obtained, and the carrier mixture and the impregnating solution are mixed in a mass ratio of 1:1 Mixed to obtain a mixture; then Co(NO 3 ) 2 ·6H 2 O is stirred and mixed with deionized water until it ...

example 2

[0019] Al first 2 o 3 with MgCl 2 After mixing at a mass ratio of 1:1, add oxalic acid solution with a mass fraction of 25% of the mass of the mixture to 30% and deionized water with a mass fraction of 13% of the mass of the mixture, stir it evenly, and add 30% of the mass fraction to it Sodium hydroxide solution, after adjusting its pH value to 6.8, it is filtered, and the filtered material is placed in an oven with a temperature of 85 ° C for 1 hour to obtain a carrier mixture; nickel nitrate is decomposed into nickel oxide by nitrogen radio frequency, The radio frequency frequency of nitrogen is 7MHz, and then add dilute hydrochloric acid solution with 25% nickel oxide mass to it, stir slowly at a speed of 90r / min, and after stirring for 45min, an impregnating solution is obtained, and the carrier mixture and the impregnating solution are mixed in a mass ratio of 1:1 Mixed to obtain a mixture; then Co(NO 3 ) 2 ·6H 2 O is stirred and mixed with deionized water until it ...

example 3

[0021] Al first 2 o 3 with MgCl 2 After mixing at a mass ratio of 1:1, add oxalic acid solution with a mass fraction of 30% of the mass of the mixture and deionized water with a mass fraction of 15% of the mass of the mixture to it, stir it evenly, and add 30% of the mass fraction to it Sodium hydroxide solution, adjust its pH value to 7.0, filter it, and place the filtered product in an oven with a temperature of 90°C for 2 hours to obtain a carrier mixture; use nitrogen radio frequency to decompose nickel nitrate into nickel oxide, The radio frequency frequency of nitrogen gas is 8MHz, and then add dilute hydrochloric acid solution with 30% nickel oxide mass to it, stir slowly at a speed of 100r / min, and after stirring for 50min, an impregnating solution is obtained, and the mass ratio of the carrier mixture and the impregnating solution is 1:1 Mixed to obtain a mixture; then Co(NO 3 ) 2 ·6H 2 O is stirred and mixed with deionized water until it is completely dissolved ...

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Abstract

The invention relates to a method for removing thiophene in coking benzene, which belongs to the field of chemical industry. The present invention first catalyzes hydrogen sulfide into hydrogen sulfide under the catalysis of the prepared metal catalyst and the assistance of methane, then catalyzes into sulfur dioxide through ozone oxidation, and finally catalyzes hydrogen sulfide and sulfur dioxide into sulfur under the action of the metal catalyst. Beneficial effects of the present invention: the present invention has high removal efficiency under secondary catalysis, and can remove the thiophene content in coking benzene to below 0.8 ppm; during the removal process, harmful gases such as hydrogen sulfide are converted into sulfur emissions, The method avoids secondary pollution to the environment and protects the environment; the preparation method and application method of the catalyst are simple and the required cost is low.

Description

technical field [0001] The invention relates to a method for removing thiophene in coking benzene, which belongs to the field of chemical industry. Background technique [0002] Coking benzene is a by-product of iron and steel enterprises and coking enterprises, and it is also a valuable resource for the development of organic and fine chemicals. However, because it contains a certain amount of thiophene impurities, its comprehensive development and utilization are largely restricted, especially in the field of catalysis. [0003] For the vast majority of small and medium-sized coking enterprises and iron and steel enterprises, the traditional pickling method is still adopted, that is, thiophene in coking benzene reacts with sulfuric acid to generate thiophene sulfonic acid, and under the catalytic action of sulfuric acid, thiophene reacts with unsaturated olefins in coking benzene. The process is simple, the production cost is low, and the technology is very mature. Therefo...

Claims

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Application Information

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IPC IPC(8): C07C7/148C07C15/04B01J23/755
CPCY02P20/52C07C7/148B01J23/002B01J23/755B01J2523/00
Inventor 陈明生薛红娟
Owner JIANGSU SHIKONG COATING
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