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Modified gasoline desulfurization adsorbent and preparation method thereof

An adsorbent and gasoline technology, applied in the field of gasoline desulfurization adsorbent and its preparation, can solve the problems of increased equipment investment and operating costs, reduced product octane number, difficult gasoline depth, etc., and achieves long service life and simple and easy preparation method. Line, low cost effect

Inactive Publication Date: 2013-06-26
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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The 13X molecular sieve adsorbent loaded with silver ions was prepared, and the thiophene in n-heptane solution was adsorbed. First, soak the 13X molecular sieve in deionized water for 3-5 hours, then rinse it repeatedly, then soak it in 70%-75% ethanol solution for 2-3 hours, then rinse it with deionized water, and place it in a vacuum drying oven to dry. Place the cleaned 13X molecular sieve in a vacuum tube furnace under N 2 Under the atmosphere, the temperature was raised to 300°C at a rate of 3°C / min, and then raised to 370°C at a rate of 5°C / min, kept at this temperature for 2.5-4h, and then lowered to room temperature at the same rate after the calcination. 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 carry out ion exchange for 12 hours. After the exchange, the molecular sieve was washed with deionized water until no silver ions ...

Embodiment 2

[0032] The 13X molecular sieve adsorbent loaded with silver ions was prepared, and the thiophene in n-heptane solution was adsorbed. First, soak the 13X molecular sieve in deionized water for 3-5 hours, then rinse it repeatedly, then soak it in 70%-75% ethanol solution for 2-3 hours, then rinse it with deionized water, and place it in a vacuum drying oven to dry. Place the cleaned 13X molecular sieve in a vacuum tube furnace under N 2 Under the atmosphere, the temperature was raised to 300°C at a rate of 3°C / min, and then raised to 370°C at a rate of 5°C / min, kept at this temperature for 2.5-4h, and then lowered to room temperature at the same rate after the calcination. 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 carry out ion exchange for 12 hours. After the exchange, the molecular sieve was washed with deionized water until no silver i...

Embodiment 3

[0034]The 13X molecular sieve adsorbent loaded with silver ions was prepared, and the thiophene in n-heptane solution was adsorbed. First, soak the 13X molecular sieve in deionized water for 3-5 hours, then rinse it repeatedly, then soak it in 70%-75% ethanol solution for 2-3 hours, then rinse it with deionized water, and place it in a vacuum drying oven to dry. Place the cleaned 13X molecular sieve in a vacuum tube furnace under N 2 Under the atmosphere, the temperature was raised to 300°C at a rate of 3°C / min, and then raised to 370°C at a rate of 5°C / min, kept at this temperature for 2.5-4h, and then lowered to room temperature at the same rate after the calcination. 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 carry out ion exchange for 12 hours. After the exchange, the molecular sieve was washed with deionized water until no silver ions w...

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PUM

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Abstract

The invention discloses modified gasoline desulfurization adsorbent and a preparation method thereof and relates to a gasoline desulfurization adsorbent and a preparation method thereof. The adsorbent is used for deeply removing thiophene as well as a derivative thereof and benthiophene in the gasoline; the adsorbent is 13X molecular sieve adsorbent loaded with Ag ion; the sliver element content is 3%-5% of the total weight of the adsorbent; and the silver element is in an ionic form. The preparation method of the modified gasoline desulfurization adsorbent comprises the following steps of: roasting and pre-treating adsorbent carrier particle materials; carrying out ion exchange between the carrier particles with the soluble silver salt; washing the loaded carrier particles; drying the particle materials; and roasting and activating the dried particles. According to the modified gasoline desulfurization adsorbent and the preparation method thereof disclosed by the invention, the adsorbent carrier is easily available and cheap; the preparation method is simple and easy to implement; the service life of the adsorbent is longer and can be circulated and regenerated; and the regenerated adsorbent has better desulfurization performances.

Description

technical field [0001] The invention relates to a gasoline desulfurization adsorbent and a preparation method thereof, in particular to a modified gasoline desulfurization adsorbent and a preparation method thereof. Background technique [0002] The ultra-deep desulfurization of gasoline has become an important problem to be solved worldwide. The combustion of sulfur in gasoline produces 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 motor vehicle exhaust gas treatment catalysts, reduce their catalytic activity, increase the emission of particulate pollutants, and aggravate urban environmental pollution. Therefore, limiting sulfur content is an important indicator in automotive standards and a key factor in evaluating the cleanliness of gasoline. [0003] At present, the industr...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/30C10G25/00
Inventor 李文秀张志刚许天行范俊刚李志超
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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