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Preparation method and application of rey molecular sieve adsorbent for ultra-deep removal of thiophene sulfides in gasoline

A technology of molecular sieves and adsorbents, which is applied in the field of preparation of REY molecular sieve adsorbents, can solve the problems of small number of active sites for adsorption of rare earth species, great difference in industrial demand, and low utilization rate of rare earths, so as to reduce the preparation cost and improve the utilization rate , the effect of reducing the roasting temperature

Active Publication Date: 2021-03-02
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] To sum up, REY molecular sieve adsorbents reported in relevant literature have the following problems: (1) high preparation cost and high energy consumption; (2) the number of rare earth species adsorption active sites in the supercage is small, and the rare earth utilization rate is low; (3) The breakthrough sulfur capacity of adsorbents for sulfur compounds in gasoline is far from the industrial demand

Method used

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  • Preparation method and application of rey molecular sieve adsorbent for ultra-deep removal of thiophene sulfides in gasoline
  • Preparation method and application of rey molecular sieve adsorbent for ultra-deep removal of thiophene sulfides in gasoline
  • Preparation method and application of rey molecular sieve adsorbent for ultra-deep removal of thiophene sulfides in gasoline

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Weigh 5.0 g of NaY molecular sieve raw powder (molar ratio of silicon to aluminum is 2.65), measure 125 ml of cerium nitrate solution with a concentration of 0.01 mol / L, put the two into a three-necked flask connected to a condenser tube, and place the Stirring in a magnetic stirrer, the temperature of the oil bath was controlled at 100 o C, after stirring for 6 h (rotation speed: 400~500 r / min), cool to 80 o C, using 80 o Suction filtration with distilled water of C, washed to neutrality, and the obtained filter cake was dried in a drying oven for a day and night, and then the dried sample was placed in 150 oC , Activated under nitrogen atmosphere for 6 h to obtain sample A, the loading amount of Ce element was measured to be 3.84 by XRF analysis wt %.

[0040] Dissolve 0.2772 g of thiophene in 500 mL of n-octane to prepare a thiophene simulated oil with a sulfur content of 300 ppm. Weigh 1.0 g of adsorbent A, grind it into 100-mesh particles, and place them in a ...

Embodiment 2

[0042] All the other are the same as Example 1, the difference is: the concentration of cerium nitrate solution is 0.025 mol / L, exchange, filter, dry, and roast to obtain sample B, through XRF analysis, it is recorded that the loading capacity of Ce element is 9.27 wt %.

[0043] The rest are the same as in Example 1, except that: when the sulfur content in the liquid phase product is greater than zero, the breakthrough adsorption sulfur capacity of the adsorbent B is 13.86 mg S / g adsorbent B.

Embodiment 3

[0045] All the other are with embodiment 1, difference is: the concentration of cerium nitrate solution is 0.05 mol / L, and roasting temperature is 120 oC , to obtain sample C1, which was analyzed by XRF, and the loading amount of Ce element was measured to be 12.29 wt %.

[0046] The rest are the same as in Example 1, except that the breakthrough adsorption sulfur capacity of the adsorbent C1 is 14.52 mg S / g adsorbent C1 when the sulfur content in the liquid phase product is measured to be greater than zero.

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Abstract

The invention belongs to the fields of environmental pollution chemistry and gasoline desulfurization, and relates to a preparation method and application of a REY molecular sieve adsorbent with a relatively high penetration adsorption sulfur capacity for sulfur compounds in gasoline. The preparation method includes the following steps: a) selecting Y-type molecular sieve raw powder with different silicon-aluminum molar ratios; b) preparing a rare earth salt solution; c) mixing the Y-type molecular sieve raw powder described in step a) with the rare earth salt solution prepared in step b) at a certain solid-to-liquid ratio. Perform one or more ion exchanges at a certain temperature, wash, filter, and dry; d) Roast the dried product in step c) to obtain the target product REY molecular sieve adsorbent. The invention has low preparation cost, low energy consumption, large penetration adsorption sulfur capacity, high desulfurization efficiency, and the adsorbent can be regenerated many times.

Description

technical field [0001] The invention belongs to the fields of environmental pollution chemistry and gasoline desulfurization, and relates to a preparation method and application of a REY molecular sieve adsorbent which has a relatively high penetration adsorption sulfur capacity for sulfur compounds in gasoline. Background technique [0002] In view of the increasingly stringent environmental protection requirements worldwide, the research and development of clean gasoline production technology is one of the most concerned hot issues in the field of fuel production. Among them, the ultra-deep removal of thiophene sulfides in gasoline oil products such as FCC gasoline and light gasoline is related to the production of high-quality oil products. The traditional hydrodesulfurization technology is hindered by the severe loss of octane number caused by deep hydrogenation, which hinders the development of this technology. Selective adsorption desulfurization technology seems to b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J20/30B01J20/34C10G25/05
CPCB01J20/18B01J20/3408B01J20/3475C10G25/05C10G2300/202
Inventor 宋丽娟祖运秦玉才惠宇郭忠森张晓彤
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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