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Gasoline desulfurization method

A gasoline and heavy gasoline technology, applied in the field of desulfurization, can solve the problems of limited desulfurization depth and octane number loss, and achieve the effects of mild process operating conditions, high sulfur capacity, and avoiding waste of raw materials

Inactive Publication Date: 2015-06-03
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The invention provides a gasoline desulfurization method, which is used to solve technical defects such as limited desulfurization depth and large octane number loss of the gasoline desulfurization method in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 1. Preparation of desulfurization adsorbent

[0062] 1) Preparation of alkali-treated molecular sieve and activated carbon

[0063] After heating two 500mL NaOH solutions with a concentration of 0.3mol / L in a water bath to about 70°C, add 25g of ZSM-5 molecular sieve and 25g of activated carbon to them respectively, stir for about 200 minutes, and immediately cool the mixture in an ice bath. to normal temperature, filter and wash the filter cake with deionized water for several times until the pH value of the filtrate is about 7, then place the obtained filter cake in an oven at 110°C for 4 hours to obtain alkali-treated ZSM- Type 5 molecular sieve and activated carbon treated with alkali; Among them, the adsorption-desorption isotherms and pore size distribution curves of ZSM-5 molecular sieve before and after alkali treatment are shown in figure 1 and figure 2 .

[0064] In addition, ASAP2000 automatic physical adsorption instrument was used to measure the specifi...

Embodiment 2

[0090] 1. Preparation of desulfurization adsorbent

[0091] 1) Preparation of alkali-treated molecular sieve and activated carbon

[0092] After raising the temperature of two 500mL NaOH solutions with a concentration of 0.2mol / L in a water bath to about 80°C, add 25g of Y-type molecular sieve and 25g of activated carbon to them respectively, stir for about 120 minutes, and immediately cool the mixture to room temperature in an ice bath , filter and wash the filter cake with deionized water for several times until the pH value of the filtrate is about 7, then place the obtained filter cake in an oven at 120°C for 3 hours to obtain alkali-treated Y-type molecular sieve and The specific surface area and pore size distribution of alkali-treated activated carbon; Y-type molecular sieve and activated carbon are shown in Table 3.

[0093] Table 3 Specific surface area and pore size of Y-type molecular sieve and activated carbon

[0094]

[0095] 2) Preparation of composite carr...

Embodiment 3

[0113] 1. Preparation of desulfurization adsorbent

[0114] 1) Preparation of alkali-treated molecular sieve and activated carbon

[0115] After raising the temperature of two 500mL NaOH solutions with a concentration of 0.2mol / L in a water bath to about 70°C, add 25g of ZSM-5 molecular sieve and 25g of activated carbon to them respectively, stir for about 90 minutes, and immediately cool the mixture in an ice bath. to room temperature, filter and wash the filter cake with deionized water for several times until the pH value of the filtrate is about 7, then place the obtained filter cake in an oven at 120°C for 3 hours to dry;

[0116] The ZSM-5 type molecular sieve obtained and the active carbon obtained repeat the above-mentioned steps once respectively (i.e., alkali treatment twice), and the ZSM-5 type molecular sieve through alkali treatment and the active carbon through alkali treatment are obtained; the ZSM-5 type molecular sieve and active carbon The specific surface a...

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Abstract

The invention provides a gasoline desulfurization method. The gasoline desulfurization comprises the following steps: cutting a gasoline raw material into a light gasoline fraction and a heavy gasoline fraction; performing adsorption desulfurization on the light gasoline fraction to obtain desulfurized light gasoline fraction; and performing selective hydrogenation desulfurization on the heavy gasoline fraction to obtain desulfurized heavy gasoline fraction, wherein the cutting temperature of the light gasoline fraction and the heavy gasoline fraction is 70-110 DEG C. By adopting the gasoline desulfurization method, not only can deep desulfurization of gasoline be realized, but also the octane loss is low.

Description

technical field [0001] The invention relates to a desulfurization method, in particular to a gasoline desulfurization method. Background technique [0002] With the increasingly stringent environmental protection regulations around the world, people's requirements for the quality of gasoline products are also getting higher and higher. For example, since January 1, 2014, my country has implemented the National IV emission standard for oil products nationwide, which requires the sulfur content of gasoline to be reduced to below 50ppm; at the same time, my country has also introduced the National V quality standard, which requires the The sulfur content is reduced to below 10ppm, while the olefin content is controlled below 24%. [0003] Compared with developed countries, the sulfur content in gasoline in my country is relatively high, the main reason is that about 70-80% of gasoline in my country comes from catalytic cracking (FCC) process. Since about 90% of the olefin cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/202
Inventor 高金森赵亮郝天臻徐春明韩晓娜
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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