A kind of preparation method of high temperature gas phase dechlorination agent

A technology of dechlorination agent and high temperature gas, applied in the field of gas phase dechlorination, can solve problems such as prolonging the service life of dechlorination agent, and achieve the effects of improving adsorption activity, penetrating chlorine capacity, increasing porosity and stable structure

Active Publication Date: 2021-04-30
XIAN ORIGIN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method utilizes the reaction of bicarbonate and calcium hydroxide, bicarbonate roasting reaction and causticizing reaction to prepare carbonate and alkali in situ to obtain a dechlorination agent with carbonate, alkali and calcium hydroxide as active components. Improve the adsorption activity and penetration chlorine capacity of the dechlorination agent, so that the dechlorination agent has strong chlorine removal performance, strong water vapor resistance and strength, and solves the problem of dechlorination agent pulverization in the process of high-temperature gas phase dechlorination and dechlorination agent bed compaction, prolonging the service life of dechlorination agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation method of the present embodiment comprises the following steps:

[0042] Step 1, mix 20kg potassium bicarbonate and 40kg calcium hydroxide evenly to obtain a mixture, then add 6kg of water and stir until it is pasty, and obtain a mixture slurry;

[0043] Step 2, leave the mixed slurry obtained in the step 1 open to stand in the open for reaction, then dry naturally, so that the mass content of water in the mixed slurry after reaction is 0.8%;

[0044] Step 3. Use a ball mill to pulverize the dried mixed slurry in step 2 to 140 mesh to 230 mesh, then dry it for 4 hours at a temperature of 130°C, and roast it at a temperature of 550°C. 4h, obtain the first intermediate of 52.17kg;

[0045] Step 4, add 2.61kg of potassium bicarbonate and 2.61kg of water to the first intermediate obtained in step 3 and fully stir, then leave it open in the open for reaction, then dry naturally to make the mass content of water in the system after the reaction Be 0.8%, obta...

Embodiment 2

[0048] The preparation method of the present embodiment comprises the following steps:

[0049] Step 1. Mix 20kg sodium bicarbonate and 80kg calcium hydroxide uniformly to obtain a mixture, then add 20kg of water and stir until it is pasty to obtain a mixture slurry;

[0050] Step 2, leave the mixed slurry obtained in the step 1 open to stand in the open for reaction, then dry naturally, so that the mass content of water in the mixed slurry after reaction is 0.9%;

[0051] Step 3: Use a ball mill to pulverize the dried mixed slurry in step 2 to 140 mesh to 230 mesh, then dry it for 5 hours at a temperature of 110°C, and roast it at a temperature of 500°C 5h, obtain the first intermediate of 88.81kg;

[0052] Step 4, add 8.88kg sodium bicarbonate to the first intermediate obtained in step 3, and 8.88kg water and fully stir, then open and leave to stand in the open for reaction, then dry naturally to make the quality of water in the system after the reaction Content is 0.9%, o...

Embodiment 3

[0055] The preparation method of the present embodiment comprises the following steps:

[0056] Step 1, mix 10kg potassium bicarbonate, 30kg sodium bicarbonate and 160kg calcium hydroxide uniformly to obtain a mixture, then add 40kg of water and stir until it is pasty, to obtain a mixture slurry;

[0057] Step 2, leave the mixed slurry obtained in the step 1 open to stand in the open for reaction, then dry naturally, so that the mass content of water in the mixed slurry after reaction is 0.5%;

[0058] Step 3. Use a ball mill to pulverize the dried mixed slurry in step 2 to 140 mesh to 230 mesh, then dry it at 140°C for 3 hours, and then bake it at 600°C. 3h, to obtain 179.51kg of the first intermediate;

[0059] Step 4, add 6.73kg potassium bicarbonate, 20.20kg sodium bicarbonate and 26.93kg water to the first intermediate obtained in step 3 and fully stir, then leave it open in the open air for reaction, then dry naturally to make the reaction The mass content of water in ...

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Abstract

The invention discloses a method for preparing a high-temperature gas-phase dechlorination agent. The method comprises: 1. Mixing potassium bicarbonate and / or sodium bicarbonate and calcium hydroxide, adding water and stirring until it is pasty to obtain a mixed slurry; 2. The mixed slurry is reacted and dried; 3. The mixed slurry after the reaction is dried and then dried and roasted successively to obtain the first intermediate; 4. Adding potassium bicarbonate and / or carbonic acid to the first intermediate Sodium hydrogen and water are stirred and reacted, and the second intermediate is obtained after drying; fifth, the second intermediate is crushed and formed, and then dried and roasted in sequence to obtain a high-temperature gas-phase dechlorination agent. The present invention utilizes the reaction of bicarbonate and calcium hydroxide, bicarbonate roasting reaction and causticizing reaction to prepare carbonate and alkali in situ to obtain a dechlorination agent with carbonate, alkali and calcium hydroxide as active components. The dechlorination agent has strong dechlorination performance, water vapor resistance and strength, solves the problems of dechlorination agent pulverization and dechlorination agent bed compaction, and prolongs the service life of the dechlorination agent.

Description

technical field [0001] The invention belongs to the technical field of gas-phase dechlorination, and in particular relates to a preparation method of a high-temperature gas-phase dechlorination agent. Background technique [0002] Continuous reforming is the core process for generating aromatics and high-octane gasoline components, and its key technology is catalyst regeneration. Due to the limitation of the regeneration process conditions, the regeneration tail gas inevitably contains a certain amount of hydrogen chloride (up to 2000 mg / kg) and a large amount of water vapor (up to 10%). Whether it is the reforming process of Universal Petroleum Products Company (UOP) or the French Petroleum Research Institute (Axens) or the domestic continuous catalytic reforming technology (CCR), the initial process design uses alkali washing to remove Chlorine, but the alkaline cleaning method has the following serious shortcomings: (1) equipment investment is high, and the operation is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/81B01D53/68B01J20/04B01J20/30
Inventor 段超张睿齐小峰王红梅谢晓莉潘蕊娟
Owner XIAN ORIGIN CHEM TECH
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