Deep gasoline desulfurization method

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, etc., and achieve the effects of mild process operating conditions, high sulfur capacity, and high desulfurization depth.

Inactive Publication Date: 2015-06-03
CHINA UNIV OF PETROLEUM (BEIJING)
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  • 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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  • Deep gasoline desulfurization method

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 500 mL NaOH solution water baths with a concentration of 0.3 mol / L to about 70 °C, 25 g of ZSM-5 molecular sieve and 25 g of activated carbon were added to them, and after stirring for about 200 minutes, the mixture was immediately cooled in an ice bath. To room temperature, filter and filter and wash the filter cake with deionized water for several times until the pH value of the filtrate is about 7, then the obtained filter cake is placed in an oven at 110 ° C and dried for 4 hours to obtain alkali-treated ZSM- Type 5 molecular sieve and activated carbon treated with alkali; among them, the adsorption and desorption isotherms and pore size distribution curves of ZSM-5 type molecular sieve before and after alkali treatment are shown in figure 1 and figure 2 .

[0065] In addition, the specific surface area and pore si...

Embodiment 2

[0092] 1. Preparation of desulfurization adsorbent

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

[0094] After two 500mL NaOH solution water baths with a concentration of 0.2mol / L were heated to about 80°C, 25g of Y-type molecular sieves and 25g of activated carbon were respectively added to them, and after stirring for about 120 minutes, the mixture was immediately cooled to room temperature with 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, the obtained filter cake is dried in an oven at 120 ° C for 3 hours, and the alkali-treated Y-type molecular sieve and The specific surface area and pore size distribution of activated carbon treated with alkali; 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 co...

Embodiment 3

[0117] 1. Preparation of desulfurization adsorbent

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

[0119] After two 500mL NaOH solution water baths with a concentration of 0.2mol / L were heated to about 70°C, 25g of ZSM-5 molecular sieves and 25g of activated carbon were respectively added to them, and after stirring for about 90 minutes, the mixture was immediately cooled in an ice bath. To room temperature, filter and filter and wash the filter cake with deionized water for several times, until the pH value of the filtrate is about 7, the obtained filter cake is placed in an oven at 120 ° C for drying for 3 hours;

[0120] The obtained ZSM-5 molecular sieve and the activated carbon are respectively repeated the above steps once (that is, the alkali treatment is twice) to obtain the alkali treated ZSM-5 molecular sieve and the alkali treated activated carbon; ZSM-5 molecular sieve and activated carbon are obtained. The specific surface area and ...

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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 regulations around the world, people have higher and higher requirements for the quality of gasoline products. 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 issued 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 the catalytic cracking (FCC) process. Because about 90% of the olefin content and sulfur con...

Claims

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Application Information

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Patent Type & Authority Applications(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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