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Gas dechlorinating agent and preparing method thereof

A dechlorination agent and gas technology, which is applied in the field of high temperature gas dechlorination agent and preparation, can solve problems such as application limitations, and achieve the effects of large specific surface area, high chlorine capacity, gas purification degree, and chlorine capacity improvement.

Active Publication Date: 2009-07-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 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 dechlorinating agent and preparing method thereof
  • Gas dechlorinating agent and preparing method thereof

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preparation example Construction

[0018] The preparation method of the dechlorination agent provided by the present invention comprises mixing alumina precursors, alkaline earth metal oxides or their precursors, zeolite and modifiers into raw materials, then adding a pore-enlarging agent and mixing evenly, and then adding an appropriate amount of water to extrude the strips Molding, sintering at 450-700°C, the modifier is clay or bentonite.

[0019] The zeolite is preferably a large-pore hydrogen zeolite, more preferably Hβ, the precursor of alumina is preferably pseudoboehmite, the alkaline earth metal oxide is preferably calcium oxide, and the precursor of the alkaline earth metal oxide is preferably calcium hydroxide, calcium carbonate or carbonic acid hydrogen calcium.

[0020] The pore-enlarging agent is preferably methylcellulose or urea. The amount of the pore-enlarging agent added is 0.5-10% by mass of the raw material, preferably 1-5% by mass.

[0021] In the above-mentioned extrusion forming proces...

example 1

[0026] (1) Preparation of Hβ zeolite

[0027] Na-type beta zeolite was treated with 1 mol / L NH 4 The Cl solution was ion-exchanged at 95°C for 3 hours, and the NH 4 The ratio of Cl solution to zeolite beta is 5:1, dried at 120° C. for 2 hours, and calcined at 550° C. for 4 hours to obtain zeolite H beta with Na content less than 0.1% by mass.

[0028] (2) Preparation of dechlorination agent

[0029] Get 28 grams of pseudo-boehmite, 10 grams of white clay, 12 grams of Hβ zeolite, and 50 grams of calcium hydroxide and mix them, add 2.5 grams of methylcellulose (sold by Guangzhou Chemical Reagent Company) and 2.5 grams of Sesame powder and mix evenly, then add 15ml of nitric acid with a concentration of 36% by mass and 45ml of deionized water were kneaded evenly, extruded and formed, and roasted at 650° C. for 4 hours to obtain dechlorination agent A. The composition and physical properties are shown in Table 1.

[0030] (3) Evaluation of dechlorination agent performance

[0...

example 2

[0033] Prepare Hβ by the method of example 1 (1) step, then prepare dechlorination agent by the method of (2) step, the difference is that the pseudo-boehmite that adds is 40 grams, the composition and physics of the dechlorination agent B that makes The properties are shown in Table 1.

[0034] The dechlorination performance of dechlorination agent B is evaluated by the method of example 1 (3) 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 dechlorination agent, comprising 10-60% by mass of alumina, 5-60% by mass of modifier, 1-15% by mass of zeolite and 5-80% by mass of alkaline earth metal oxide, the modified The agent is clay or bentonite. The dechlorination agent can effectively remove hydrogen chloride in gas at high temperature, and has a high breakthrough chlorine capacity.

Description

technical field [0001] The invention relates to a high-temperature 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] In the production of oil refining industry, in order to ensure the performance of oil refining catalysts, maintain the normal operation of the system, and prevent equipment corrosion, the removal of hydrogen chloride in the gas is an important purification link. During the operation of the continuous reforming unit, the continuous regeneration of the reforming catalyst is a very important process. The dechlorination effect of the early alkali washing and water washing sections was not good, which led to serious corrosion of the equipment in the regeneration system and affected the normal operation of the unit. Therefore, it is an ideal choice to use a solid dechlorination agent to remove hydro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01D53/04C10G61/06
Inventor 张秋平王京红陈凤英
Owner CHINA PETROLEUM & CHEM CORP
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