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Adsorbent for deep desulfurization of refined benzene and preparation method thereof

A deep desulfurization and adsorbent technology, applied in the direction of adsorption purification/separation, chemical instruments and methods, and other chemical processes, can solve the problems of high temperature and pressure requirements, increased reaction difficulty and investment costs, etc., to achieve strong adsorption, The effect of large sulfur capacity

Inactive Publication Date: 2013-04-17
YANTAI BAICHUAN HUITONG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sulfur in benzene mainly includes inorganic sulfur and organic sulfur. Hydrodesulfurization process can effectively remove inorganic sulfur and simple organic sulfur compounds in benzene. and pressure requirements are high, increasing the difficulty of response and investment costs

Method used

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  • Adsorbent for deep desulfurization of refined benzene and preparation method thereof
  • Adsorbent for deep desulfurization of refined benzene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 200g of the г-phase spherical alumina carrier with a particle size of 1.5-3mm and a bulk density of 0.65g / ml produced by the rolling granulation method produced in China, and put it in 400ml of chloropalladium acid solution (palladium chloride solution) with a concentration of 0.0141mol / L. Soak in a solution prepared in dilute hydrochloric acid) at room temperature, filter out the adsorbent after 200 minutes and drain it, wash it with flowing deionized water until chloride ions cannot be detected with 1% silver nitrate solution in the washing water, and then absorb the adsorbent The agent is first put into an oven for drying at 60-150°C, then placed in a high-temperature furnace and roasted in an atmosphere at 300-600°C for 2-5 hours, and then cooled to room temperature to obtain the required adsorbent. The weight content of the precious metal palladium is 0.3%.

Embodiment 2

[0027] Take 200g of the г-phase spherical alumina carrier with a particle size of 1.5-3mm and a bulk density of 0.65g / ml produced by the rolling granulation method produced in China, and put it in 400ml of chloropalladium acid with a temperature of 40-95°C and a concentration of 0.0470mol / L Soak in solution (a solution made of palladium chloride dissolved in dilute hydrochloric acid), filter out the adsorbent after 30 minutes and drain it, wash it with flowing deionized water until no chloride ion can be detected with 1% silver nitrate solution in the washing water So far, put the adsorbent in an oven for drying at 60-150°C, then put it in a high-temperature furnace and roast it in an atmosphere at 300-600°C for 2-5 hours, and then cool it to room temperature to obtain the adsorbent. The weight content of precious metal palladium is 1%.

Embodiment 3

[0029] Take 200g of domestically produced г-phase columnar alumina carrier with a diameter of 3mm and a length of 3-8mm and a bulk density of 0.62g / ml into a 1000ml beaker, and pour 100ml of lanthanum nitrate aqueous solution with a concentration of 0.1440mol / L and a temperature of room temperature into the above oxidation Aluminum carrier, and stir it with a glass rod to make it absorb evenly, put the above-mentioned uniformly absorbed alumina carrier in an oven for drying at 60~150°C, and then put it in a high temperature furnace at 300~950°C for 2~5 hours in an air atmosphere After cooling to room temperature, put it away, and the weight content of lanthanum on the alumina is about 5%.

[0030] Soak the above-mentioned alumina spheres in 400ml of palladium nitrate aqueous solution (solution made by dissolving palladium nitrate in water) with a concentration of 0.0470mol / L at room temperature, filter out the adsorbent after 200 minutes and drain it, and use a flowing Wash wi...

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Abstract

The invention provides an adsorbent for deep desulfurization of refined benzene and a preparation method thereof. With alumina or sodium-potassium-lanthanum modified alumina as carrier-loaded noble metal palladium, the adsorbent at least comprises the following components in percentage by weight: 0.3-1.5 % of noble metal palladium, 0-3 % of sodium, 0-3 % of potassium, 0-5 % of lanthanum and the balance of alumina carrier. A best desulfurization effect is obtained if the alumina manufactured by using an oil column molding method is used as the carrier-loaded noble metal palladium. The adsorbent provided by the invention has the advantage of strong adsorbing capacity to sulfur and large sulfur capacity; and the total sulfur in the refined benzene can be reduced from 1 ppm to less than 0.01 ppm.

Description

[0001] Technical field: [0002] The invention relates to an adsorbent, in particular to an adsorbent for deep desulfurization of refined benzene and a preparation method. Background technique: [0003] Benzene is an important chemical raw material with a wide range of industrial uses, mainly used in the production of dyes, medicines, disinfectants, explosives and artificial fibers. With the development of organic synthesis industry, benzene products, as one of the basic chemical raw materials, are becoming more and more important. One is the growing demand, and the other is the increasingly stringent quality requirements. For example, in the production process of caprolactam, in order to protect the subsequent adsorbent, the sulfur content in benzene is required to be below 0.1ppm. Sulfur in benzene mainly includes inorganic sulfur and organic sulfur. Hydrodesulfurization process can effectively remove inorganic sulfur and simple organic sulfur compounds in benzene. And...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/30C07C15/04C07C7/12
Inventor 张红杨吉存邓世盟
Owner YANTAI BAICHUAN HUITONG TECH CO LTD
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