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A method for deep desulfurization of gasoline

A technology for deep desulfurization and gasoline, applied in the field of desulfurization, can solve the problems of limited desulfurization depth and large loss of octane number, and achieve the effects of mild process operating conditions, high sulfur capacity, and reduced component content

Inactive Publication Date: 2016-08-24
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The invention provides a gasoline deep 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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  • A method for deep desulfurization of gasoline
  • A method for deep desulfurization of gasoline
  • A method for deep desulfurization of gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] 1. Preparation of desulfurization adsorbent

[0063] 1) Preparation of alkali-treated molecular sieve and activated carbon

[0064] 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 .

[0065] In addition, ASAP2000 automatic physical adsorption instrument was used to measure the specifi...

Embodiment 2

[0092] 1. Preparation of desulfurization adsorbent

[0093] 1) Preparation of alkali-treated molecular sieve and activated carbon

[0094] 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.

[0095] Table 3 Specific surface area and pore size of Y-type molecular sieve and activated carbon

[0096]

[0097] 2) Preparation of composite carr...

Embodiment 3

[0117] 1. Preparation of desulfurization adsorbent

[0118] 1) Preparation of alkali-treated molecular sieve and activated carbon

[0119] 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;

[0120] 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 make the ZSM-5 type molecular sieve through alkali treatment and the active carbon through alkali treatment; ZSM-5 type molecular sieve and active carbon The specific surface area and pore s...

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Abstract

The invention provides a deep gasoline desulfurization method which comprises the following steps of: carrying out mercaptan removing treatment on a gasoline raw material; cutting the gasoline raw material subjected to the mercaptan removing treatment into light, medium and heavy gasoline fractions; carrying out adsorption desulfurization on the medium gasoline fraction to obtain a desulfurized medium gasoline fraction; carrying out selective hydrodesulfurization on the heavy gasoline fraction to obtain a desulfurized heavy gasoline fraction; mixing the light gasoline fraction, the desulfurized medium gasoline fraction and the desulfurized heavy gasoline fraction to obtain desulfurized gasoline, wherein the cutting temperature of the light and medium gasoline fractions is 35-60 DEG C, and the cutting temperature of the medium and heavy gasoline fractions is 70-130 DEG C. The deep gasoline desulfurization method provided by the invention can not only realize the deep desulfurization of gasoline, but also has low octane value loss.

Description

technical field [0001] The invention relates to a desulfurization method, in particular to a gasoline deep 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00B01J20/20B01J20/32
Inventor 赵亮高金森徐春明郝天臻韩晓娜
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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