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Dechlorinating agent as well as preparation method and application thereof

The technology of dechlorination agent and binder is applied in the field of dechlorination agent and its preparation, which can solve the problems of low conversion and removal efficiency of organic chlorine, inability to remove organic chlorine and inorganic chlorine at the same time, etc., and achieve good dechlorination effect. , prolong the service life, improve the effect of activity

Pending Publication Date: 2021-05-28
SHENYANG SANJUKAITE CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the dechlorination agent in the prior art cannot simultaneously remove organic chlorine and inorganic chlorine at room temperature, and the conversion and removal efficiency of organic chlorine is low, thereby providing a A kind of dechlorination agent and its preparation method and application

Method used

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  • Dechlorinating agent as well as preparation method and application thereof

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Effect test

Embodiment 1

[0037] The present embodiment provides a kind of preparation method of dechlorination agent, comprises the following steps,

[0038] The specific surface area of ​​50g is 500m 2 Molecular sieves / g were impregnated into 0.05mol / L, 100mL scandium nitrate solution to modify the molecular sieves, keeping the solution temperature at 25°C, after soaking for 12h, suction-filtered, and dried at 120°C for 2h to obtain the modified molecular sieves.

[0039] Add 5g of potassium hydroxide, 10g of magnesium carbonate and 10g of kaolin to the obtained modified molecular sieve, mix evenly, add 40g of silica sol to form a ball, dry at 110°C for 2h, and then roast at 350°C for 2h to obtain liquid phase dechlorination agent.

Embodiment 2

[0041] The present embodiment provides a kind of preparation method of dechlorination agent, comprises the following steps,

[0042] The specific surface area of ​​50g is 650m 2 Molecular sieve / g was impregnated into 0.02mol / L, 100mL rare earth solution (a mixed solution of cerium nitrate and lanthanum nitrate with a mass ratio of 1:1) to modify the molecular sieve, keeping the solution temperature at 50°C, after immersion for 16h, suction filtration, Dry at 120°C for 2 hours to obtain a modified molecular sieve.

[0043] Add 3g of potassium carbonate, 10g of calcium carbonate, 5g of turnip powder and 5g of attapulgite to the obtained modified molecular sieve, mix evenly, add 40g of silica sol to form a ball, dry at 110°C for 2h, and then roast at 450°C for 1h A liquid-phase dechlorination agent is obtained.

Embodiment 3

[0045] The present embodiment provides a kind of preparation method of dechlorination agent, comprises the following steps,

[0046] The specific surface area of ​​50g is 400m 2 Molecular sieves / g were impregnated into 0.01mol / L, 100mL scandium nitrate solution to modify the molecular sieves. Keep the solution temperature at 60°C. After soaking for 3 hours, filter with suction and dry at 110°C for 2 hours to obtain the modified molecular sieves.

[0047] Add 3g of sodium carbonate, 10g of barium carbonate and 10g of kaolin to the obtained modified molecular sieve, mix evenly, add 30g of sodium carboxymethyl cellulose solution to form a ball, dry at 120°C for 2h, and then roast at 380°C for 2h to obtain Liquid phase dechlorination agent.

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Abstract

The invention belongs to the technical field of preparation of dechlorinating agents, and particularly relates to a dechlorinating agent as well as a preparation method and application thereof. The raw materials of the dechlorinating agent comprise a molecular sieve, a rare earth metal, an alkali metal, an alkaline earth metal and a binder, the molecular sieve is an X-type molecular sieve with a low silicon-aluminium ratio, and the silicon-aluminium molar ratio is 1.0-1.2. According to the dechlorinating agent, the X-type molecular sieve with a low silicon-aluminium ratio is used as a carrier and is modified through rare earth metal, so that the activity of the molecular sieve is improved, the content of B acid is increased, acid centers on the surface of the dechlorinating agent are increased, the dechlorinating agent has a relatively high dechlorinating reaction speed, and the types of cations for balancing negative charges on a faujasite molecular sieve framework can be changed; and the acidity, the stability, the adsorption performance and the pore channel structure of the molecular sieve are regulated and controlled, and the removal effect on organic chlorine is improved. The molecular sieve is used as the carrier, the obtained dechlorinating agent has good adsorbability, the water resistance of the dechlorinating agent can be improved, hardening and pulverization of the dechlorinating agent are reduced, and the service life of the dechlorinating agent is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of dechlorination agent preparation, in particular to a dechlorination agent and its preparation method and application. Background technique [0002] In recent years, in order to increase the output of crude oil, various oil recovery additives have been widely used in various oil fields, such as demulsifiers, wax removers, acidifiers, etc., many of which contain various types of organic chlorides. It is insoluble in water, has good thermal stability, and is difficult to remove by desalting methods. Most of it exists in the straight-run naphtha fraction of atmospheric and vacuum products. Chlorine and its compounds are not only poisonous to catalysts and adsorbents, because chlorine has high electron affinity and mobility, it is easy to react with metal ions, and often migrates downward with the process fluid, causing permanent poisoning of the catalyst, and often Full-bed, affects the catalytic performance...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/30C10G25/00
CPCB01J20/16B01J20/186B01J20/12B01J20/041B01J20/043B01J20/0296B01J20/0207C10G25/003B01J2220/4806B01J2220/4825B01J2220/42
Inventor 迟莹单红飞景云峰李晓凡孙亮刘聪
Owner SHENYANG SANJUKAITE CATALYST
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