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Chloride absorbent

A technology of adsorbent and hydrogen chloride, which is applied in other chemical processes, chemical instruments and methods, and separation of dispersed particles, etc., can solve the problems of limited application fields and poor water vapor resistance, and achieve good purification, good water resistance, and mechanical high intensity effect

Inactive Publication Date: 2008-01-16
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, although hydrogen chloride adsorbent with higher breakthrough chlorine capacity and higher use temperature can be obtained, its anti-water vapor performance is poor, and its application field is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The adsorbent of the present embodiment uses kaolin 27% (weight, the same below), sodium bicarbonate 10%, calcium hydroxide 35%, diatomaceous earth 10%, zinc oxide 3%, manganese oxide 3%, titanium oxide 3%, 7% white clay and 2% carboxymethyl cellulose are used as raw materials, which are formed by kneading, mixing, extruding, and roasting at a temperature not exceeding 700°C.

[0035] Adsorption (dechlorination) conditions are: gas inlet hydrogen chloride concentration 1000-1500ppm, reaction space velocity 1500-2000hr -1 , Dechlorination temperature 100 ℃. The dechlorination agent can reduce the hydrogen chloride content of the outlet gas to below 0.5ppm, and the penetration chlorine capacity is 10%.

[0036] The concentration of hydrogen chloride in the import and export gas is detected by the silver nitrate volumetric method, and the chlorine capacity of the solid dechlorination agent is analyzed according to the determination method of chlorine in coal.

Embodiment 2

[0038] The raw materials for preparing the adsorbent in this example are: 20% of sepiolite, 10% of alkalized diatomite, 5% of clay, 5% of sodium bicarbonate, 30% of calcium carbonate, 10% of magnesium oxide, and 5% of manganese oxide , iron oxide 3%, chromium oxide 5%, ammonium bicarbonate 3%, carboxymethyl fiber 4%. After being ground and extruded, it is baked at a temperature lower than 700°C.

[0039] The adsorption (dechlorination) conditions are: the hydrogen chloride content of the gas inlet is 1500-1800ppm, and the reaction space velocity is 1500-2000hr -1 , The dechlorination temperature is 200°C. The concentration of hydrogen chloride at the gas outlet is less than 0.5ppm, and the breakthrough chlorine capacity is 15.3%.

[0040] The analysis detection method of hydrogen chloride concentration and chlorine volume is the same as embodiment 1.

Embodiment 3

[0042] The composition of raw materials in this example: 20% of alkalized kaolin, 15% of diatomite, 20% of calcium carbonate, 20% of calcium hydroxide, 5% of sodium bicarbonate, 5% of iron oxide, 3% of copper oxide, and 5% of magnesium oxide. %, carboxymethyl cellulose 4% and ammonium bicarbonate 3%. The calcining temperature after extruding is lower than 700°C.

[0043] The adsorption (dechlorination) conditions are: the hydrogen chloride content of the gas inlet is 2000-2300ppm, and the reaction space velocity is 2500hr -1 The dechlorination temperature is 300°C, the concentration of hydrogen chloride at the gas outlet is less than 0.5ppm, and the breakthrough chlorine capacity is 28.4%.

[0044] The analysis detection method of hydrogen chloride concentration and chlorine volume is the same as embodiment 1.

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Abstract

The invention relates to the chlorine hydride adsorbent, which takes the metallic compounds and the mineral as main materials, and is prepared by roasting under the temperature between 350-800 DEG C, the invention is characterized in that the metallic compounds are composed of the alkali metal and / or alkaline earth metal compounds and transition metal oxide, the content of transition metal oxide is eight percent to twenty five percent according to the weight percentage; the compressive strength of chlorine hydride adsorbent is more than 80N / cm, breakthrough chlorine content is more than forty eight percent under the temperature of 500 DEG C. The chlorine hydride adsorbent of the invention has advantages of wide range of temperature suitability, good purifying degree, high chloride capacity, excellent water tolerance performance and high mechanical strength.

Description

technical field [0001] The present invention relates to an adsorbent, in particular to a hydrogen chloride adsorbent. Background technique [0002] Hydrogen chloride can not only "poison" various catalysts, but also cause corrosion to chemical equipment and pipelines and pollute the environment. Therefore, the development of effective hydrogen chloride adsorbent is of great significance to both chemical production and environmental protection. [0003] US.Pat.No.4,639,259 reports a kind of hydrogen chloride is reduced to 1ppm at normal temperature, and the hydrogen chloride sorbent that penetrates chlorine capacity is 20% (the weight of hydrogen chloride sorbent adsorbed chlorine / hydrogen chloride sorbent weight); CN 1064099A, CN 1079415A and ZL01126381.4 respectively disclose hydrogen chloride adsorbents with different operating temperatures and different breakthrough chlorine capacities. [0004] Looking at the existing hydrogen chloride adsorbents, most of them use comp...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/04B01D53/02B01D53/68
Inventor 吴幼青高晋生潘博黄倬平黄浩
Owner EAST CHINA UNIV OF SCI & TECH
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