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A kind of high-precision liquid phase dechlorination agent and preparation method thereof

A dechlorination agent, high-precision technology, applied in chemical instruments and methods, refining with metal oxides, physical/chemical process catalysts, etc., can solve the problems of easy chlorine desorption, chlorine capacity, poor water resistance, etc., to achieve enhanced energy supply Electronic ability, increase pore volume and specific surface area, and enhance the effect of bonding strength

Active Publication Date: 2017-05-03
SHENYANG SANJUKAITE CATALYST
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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 to overcome the defects of poor water resistance, prone to chlorine desorption and small chlorine capacity in the liquid phase dechlorination agent in the prior art, and then provide a kind of dechlorination agent with good water resistance and no chlorine desorption Liquid-phase dechlorination agent with high chlorine capacity and high dechlorination precision and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of the liquid phase dechlorination agent described in the present embodiment comprises:

[0031] (1) The concentrated sulfuric acid of 98wt% and the hydrogen peroxide of 40wt% are mixed in the ratio of 3:1 by volume to form a mixed solution, and activated carbon is added into the mixed solution, soaked for 1h to modify the activated carbon, the addition of activated carbon The amount is 50wt% of the mixed liquid mass;

[0032] After modification, the activated carbon was taken out, washed with water until neutral, and then dried at 110°C for 6 hours to obtain modified activated carbon;

[0033] (2) Copper nitrate and calcium nitrate are dissolved in water to form a Cu-Ca composite solution, and the modified activated carbon of step (1) is placed in the Cu-Ca composite solution for immersion for 5h, and the addition of modified activated carbon is Cu-Ca composite solution 50wt% of the solution mass;

[0034] After the impregnation is completed, f...

Embodiment 2

[0039] The preparation method of the liquid phase dechlorination agent described in the present embodiment comprises:

[0040] (1) The concentrated sulfuric acid of 98wt% and the hydrogen peroxide of 50wt% are mixed in the ratio of 2:1 by volume to form a mixed solution, add activated carbon to the mixed solution, soak for 1h to modify the activated carbon, the addition of activated carbon The amount is 30wt% of the mixed liquor mass;

[0041] After modification, the activated carbon was taken out, washed with water until neutral, and then dried at 90°C for 8 hours to obtain modified activated carbon;

[0042] (2) Copper acetate and calcium acetate are dissolved in water to form a Cu-Ca composite solution, and the modified activated carbon of step (1) is placed in the Cu-Ca composite solution for immersion for 3h, and the addition of modified activated carbon is Cu-Ca composite solution 40wt% of the solution mass;

[0043] After the impregnation is completed, filter, collect...

Embodiment 3

[0048] The preparation method of the liquid phase dechlorination agent described in the present embodiment comprises:

[0049] (1) The concentrated sulfuric acid of 98wt% and the hydrogen peroxide of 30wt% are mixed in the ratio of 4:1 by volume to form a mixed solution, and activated carbon is added into the mixed solution, soaked for 1h to modify the activated carbon, the addition of activated carbon The amount is 80wt% of the mixed liquid mass;

[0050] After modification, the activated carbon was taken out, washed with water until neutral, and then dried at 85°C for 7 hours to obtain modified activated carbon;

[0051] (2) add ethylenediaminetetraacetic acid to deionized water, continue to add copper acetate and calcium acetate to form Cu-Ca composite solution under constant stirring, the addition of ethylenediaminetetraacetic acid is 5.5wt of Cu-Ca composite solution quality %;

[0052] The modified activated carbon of step (1) is placed in the Cu-Ca composite solution ...

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Abstract

The invention provides a high-precision liquid-phase dechlorination agent, which is composed of the following components: 5-20wt% of CuO, 5-10wt% of CaO, 4-8wt% of KOH, and the balance is modified activated carbon; Modified activated carbon is activated carbon that has been acidified and oxidized. The dechlorination agent of the present invention uses modified activated carbon as a carrier, which can not only optimize the pore structure of activated carbon, increase the pore volume and specific surface area, but also increase the content of oxygen-containing functional groups on the surface of activated carbon, improve the polarity of the carrier, and enhance the carrier and activity. The combination degree between components reduces the loss of active components, and because hydrogen chloride is a polar molecule, it is easier to be stably adsorbed on the surface of modified activated carbon that also has a higher polarity, which is conducive to improving the dechlorination accuracy. Simultaneously, the synergistic effect of above-mentioned three active substances in the dechlorination agent of the present invention has increased the reactivity of dechlorination agent and hydrogen chloride, has realized the maximization of chlorine capacity of dechlorination agent effectively, makes the liquid phase dechlorination agent of the present invention The chlorine capacity is as high as 16%, and the dechlorination accuracy is as low as 0.5ppm.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a high-precision liquid-phase dechlorination agent for removing hydrogen chloride in oil products and a preparation method thereof. Background technique [0002] In a modern refinery, continuous reforming has become the main technology for producing high-octane gasoline and aromatics, and it is also the main source of hydrogen for the hydrogenation unit of the refinery. Therefore, whether the catalytic reforming unit operates smoothly directly affects the production efficiency of the entire refinery. economic benefits. [0003] During the catalytic reforming reaction, the chlorine on the reforming catalyst will be continuously lost. In order to maintain the acidic function of the catalyst, it is necessary to continuously replenish organic chlorides to control the water-chlorine balance of the catalyst. Part of the chlorine will be dissolved in the reforming product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01J23/02B01J23/04C10G29/16
CPCC10G29/16C10G2300/201
Inventor 刘聪
Owner SHENYANG SANJUKAITE CATALYST
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