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Gas dechlorination agent and preparation method thereof

A dechlorination agent and gas technology, which is applied in the field of gas dechlorination agent and its preparation, can solve the problems of equipment corrosion, application limitation and complicated operation of the regeneration circuit, and achieves high-pressure crushing strength, increased specific surface area, and increased pore volume. Effect

Active Publication Date: 2009-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the continuous reforming catalyst regeneration process, the chlorine in the regeneration gas is removed through the alkali washing tower. The alkali washing method has the following disadvantages: (1) high equipment investment and complicated operation; (2) with the increase of the continuous reforming unit operating time , the effect of dechlorination is becoming less and less ideal, it is easy to corrode the equipment of the regeneration circuit, affect the normal operation of the device, and even affect the regeneration activity of the reforming catalyst
[0007] Most of the above dechlorination agents use alkali metal or alkaline earth metal compounds as active components, and the purification degree is high, but the dechlorination temperature is lower than 500 ° C, which limits its application

Method used

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  • Gas dechlorination agent and preparation method thereof
  • Gas dechlorination agent and preparation method thereof
  • Gas dechlorination agent and preparation method thereof

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preparation example Construction

[0016] The preparation method of the gas dechlorination agent provided by the present invention comprises mixing alkaline earth metal oxides or their precursors, alumina or its precursors, and bentonite as raw materials, and then adding a pore-enlarging agent and mixing evenly. Baking at 700°C.

[0017] The alkaline earth metal oxide described in the above method is preferably calcium oxide, and the precursor of the alkaline earth metal oxide is preferably calcium hydroxide, calcium carbonate or calcium bicarbonate. The precursor of alumina is preferably pseudoboehmite or alumina sol.

[0018] The pore-enlarging agent is preferably methyl cellulose or ammonium bicarbonate, and the amount of the pore-enlarging agent added is 0.5-15% by mass of the total amount of raw materials, preferably 1.0-10% by mass.

[0019] In the preparation method of the dechlorination agent, after mixing the raw materials and adding the pore-enlarging agent, it is preferable to add the extrusion aid....

example 1

[0022] (1) Preparation of dechlorination agent

[0023] Get 15 grams of pseudo-boehmite (aluminum oxide content is 70 mass %, the PURAL that Germany Sasol company produces SB), 2 grams of calcium-based bentonite (dry base solid content is 90 mass %, Henan Xinyang Daye Bentonite Co., Ltd.) and 80 grams of calcium hydroxide are mixed to make raw materials, add 2 grams of methylcellulose (Shandong Ruitai Chemical Co., Ltd. Production) and 2 gram of Squatia powder mix homogeneously, then add 15ml concentration and be that the nitric acid of 33 mass % and 45ml deionized water mix and knead evenly, extrusion molding, 120 ℃ of drying 2 hours, 650 ℃ of roasting 4 hours, obtain dechlorination agent A , and its composition and physical properties are listed in Table 1.

[0024] (2) Evaluation of dechlorination agent performance

[0025] Grind the dechlorination agent finely, take 150-420 micron particles and put them into a quartz glass tube with an inner diameter of 6 mm, and use th...

example 2

[0028] Prepare dechlorination agent by the method of example 1 (1) step, and difference is that the addition of bentonite is 10 grams, and the composition and physical property of the dechlorination agent B that makes are shown in Table 1.

[0029] The dechlorination performance of dechlorination agent B is evaluated by the method of example 1 (2) step, and the penetration chlorine capacity of dechlorination agent B at each adsorption temperature is shown in Table 2.

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Abstract

A gas antichlor comprises 50 to 88 mass percent of alkaline earth oxides, 10 to 40 mass percent of alumina and 2 to 30 mass percent of bentonite. The antichlor can effectively remove the hydrogen chloride in the gas at high temperature, is especially suitable for the dechlorination of a constant reforming and regenerative gas with high water content, is not easy to slime or cake in the process of dechlorination, and has higher crushing strength.

Description

technical field [0001] The invention relates to a gas dechlorination agent and a preparation method thereof, in particular to a dechlorination agent for removing hydrogen chloride from high-temperature gas and a preparation method thereof. Background technique [0002] Continuous reforming is an important process technology for producing high-octane gasoline and aromatics, and its core is catalyst regeneration technology. During the continuous reforming catalyst regeneration process, the chlorine in the regeneration gas is removed through the alkali washing tower. The alkali washing method has the following disadvantages: (1) high investment in equipment and complicated operation; (2) with the increase of the operating time of the continuous reforming unit , the dechlorination effect is becoming less and less ideal, and it is easy to corrode the equipment of the regeneration circuit, affect the normal operation of the device, and even affect the regeneration activity of the ...

Claims

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Application Information

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IPC IPC(8): B01D53/68
Inventor 张秋平姚广
Owner CHINA PETROLEUM & CHEM CORP
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