Petrol deep desulfurization adsorbent and preparation method thereof

A technology of deep desulfurization and adsorbent, applied in chemical instruments and methods, refined hydrocarbon oil, petroleum industry, etc., can solve the problems of increased equipment investment and operating costs, reduced product octane number, difficult gasoline depth, etc., and achieves service life. The effect of long, simple preparation method and low cost

Inactive Publication Date: 2013-04-17
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If thiophene sulfides are to be reacted, it needs to be carried out under harsh conditions such as higher reaction temperature, pressure and a large amount of precious metal catalysts, and the equipment investment and operating costs will increase accordingly
Moreover, deep hydrodesulfurization, under the condition of consuming a large amount of hydrogen, can easily saturate the olefins in gasoline and reduce the octane number of the product
In order to solve the problem that hydrodesulfurization is difficult to deeply process gasoline, a promising desulfurization technology—adsorption desulfurization technology has attracted the attention of scientific researchers

Method used

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Examples

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Effect test

preparation example Construction

[0024] The invention provides a novel desulfurization adsorbent and a modification and preparation method of the adsorbent. Using 13X molecular sieve as the adsorbent carrier, the silver ions are loaded on the adsorbent carrier through liquid-phase ion exchange, and after roasting and activation, a selective desulfurization adsorbent is prepared for selective adsorption and removal of thiophene sulfides in gasoline.

[0025] The adsorbent carrier used in the present invention is 13X molecular sieve produced by Tianjin Nanhua Catalyst Co., Ltd., and its technical parameters are: bulk density of 0.66g / ml, particle size of 2.0-2.8mm, abrasion rate ≤0.15%, static water adsorption It is 24% and the ethylene adsorption is 18%.

[0026] The 13X molecular sieve is soaked in deionized water for 3-5 hours and then rinsed repeatedly, then soaked in 70%-75% ethanol solution for 2-3 hours, then rinsed with deionized water, and placed in a vacuum drying oven for drying.

[0027] Place the cleaned...

Embodiment 1

[0032] A 13X molecular sieve adsorbent loaded with silver ions was prepared, and thiophene in the n-heptane solution was adsorbed. Firstly, the 13X molecular sieve was soaked in deionized water for 3-5h and then rinsed repeatedly, then soaked in 70%-75% ethanol solution for 2-3h, then rinsed with deionized water, and placed in a vacuum drying oven for drying. Place the cleaned 13X molecular sieve in a vacuum tube furnace, in the N 2 In the atmosphere, the temperature is increased to 300°C at a rate of 3°C / min, and then to 370°C at a rate of 5°C / min. The temperature is maintained at this temperature for 2.5-4h, and after the calcination is completed, the temperature is reduced to room temperature at the same rate. Prepare a certain concentration of silver nitrate solution according to the ion exchange equivalent, immerse the pretreated 13X molecular sieve in the silver nitrate solution, and perform ion exchange for 12 hours. After the exchange is over, wash the molecular sieve w...

Embodiment 2

[0034] A 13X molecular sieve adsorbent loaded with silver ions was prepared, and thiophene in the n-heptane solution was adsorbed. Firstly, the 13X molecular sieve was soaked in deionized water for 3-5h and then rinsed repeatedly, then soaked in 70%-75% ethanol solution for 2-3h, then rinsed with deionized water, and placed in a vacuum drying oven for drying. Place the cleaned 13X molecular sieve in a vacuum tube furnace, in the N 2 In the atmosphere, the temperature is increased to 300°C at a rate of 3°C / min, and then to 370°C at a rate of 5°C / min. The temperature is maintained at this temperature for 2.5-4h, and after the calcination is completed, the temperature is reduced to room temperature at the same rate. Prepare a certain concentration of silver nitrate solution according to the ion exchange equivalent, immerse the pretreated 13X molecular sieve in the silver nitrate solution, and perform ion exchange for 12 hours. After the exchange is over, wash the molecular ...

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Abstract

The invention discloses petrol deep desulfurization adsorbent and a preparation method thereof, and relates to petrol adsorbent and a preparation method thereof. The desulfurization adsorbent takes 13X molecular sieve as a carrier, loads transition metal silver ion onto the carrier through a liquid ion-exchange method, and is obtained after roasting activation. The preparation method of the adsorbent comprises the steps of the pretreatment of material carrier, metal ion exchange, adsorbent drying, roasting activation and the like, and finally the molecular sieve desulfurization adsorbent with silver ion loaded is obtained. The adsorbent has a long service life, can be recycled, and still has good desulfurization performance after recycle. Adsorption experiment test shows that the adsorbent has high adsorption capacity and adsorption selectivity to thiophene, derivative thereof and benzothiophene in petrol, the adsorption process can be performed in the condition of normal temperature and normal pressure, the operation cost is low, no pollutant is produced during the adsorption process, and the adsorbent has good economic usefulness and meets the environmental requirement.

Description

Technical field [0001] The invention relates to a gasoline adsorbent and a preparation method thereof, in particular to a gasoline deep desulfurization adsorbent and a preparation method thereof. Background technique [0002] The ultra-deep desulfurization of gasoline has become an important problem to be solved urgently worldwide. The sulfur in gasoline burns to produce sulfur oxides (SO x ) Is one of the main pollutants in the atmosphere, and its discharge into the air will form acid rain and destroy the ecological environment. In addition, sulfur oxides can also corrode and damage engine components, poison the vehicle exhaust treatment catalyst, reduce its catalytic activity, increase the emission of particulate pollutants, and increase urban environmental pollution. Therefore, limiting sulfur content is an important indicator in the automotive standards and a key factor in evaluating gasoline cleanliness. [0003] At present, the industry mainly uses hydrodesulfurization tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/30C10G25/00
Inventor 李文秀张志刚许天行王晓丹
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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