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Quality improvement method of catalytic cracking gasoline

A technology of catalytic cracking gasoline and heavy gasoline, which is applied in the field of catalytic cracking gasoline upgrading, which can solve the problems of ineffective octane number recovery process, large proportion of hydroprocessing, and inability to effectively improve octane number, etc.

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

AI Technical Summary

Problems solved by technology

Although this method can effectively desulfurize, and the degree of reduction of octane number has also been eased to a certain extent, it cannot effectively increase the octane number, and the process flow is very different from that of the present invention.
[0010] To sum up, the existing technologies for reducing the sulfur content of FCC gasoline generally have the problems of large proportion of hydrotreating and large loss of octane number when meeting the requirements of deep desulfurization
Some octane recovery processes supporting the hydrodesulfurization process have no obvious effect

Method used

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  • Quality improvement method of catalytic cracking gasoline
  • Quality improvement method of catalytic cracking gasoline
  • Quality improvement method of catalytic cracking gasoline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] 1. Preparation of desulfurization adsorbent

[0071] 1) Preparation of alkali-treated molecular sieve and activated carbon

[0072] 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;

[0073] In addition, ASAP2000 automatic physical adsorption instrument was used to measure the specific surface area and pore size distribution of ZSM-5 molecular sieve and activated carbon, and the results are shown in Table 1.

[0074] Table 1 The specific surface area and pore s...

Embodiment 2

[0105] 1. Preparation of selective hydrodesulfurization catalyst

[0106] Prepare the selective hydrodesulfurization catalyst according to the method of Example 1, the difference is that the loading of Co on the carrier is controlled to be about 6%, the loading of Mo on the carrier is about 10%, and the Co and Mo loaded on the carrier The mass ratio is 0.6:1.

[0107] 2. Preparation of aromatization / hydroisomerization reaction catalyst

[0108] MCM-41 molecular sieve and alumina were mixed according to the mass ratio of 80:20 to prepare the second composite carrier, wherein the mass ratio of molecular sieve to alumina was 1:0.25.

[0109] Using ZnSO 4The solution impregnates the second composite carrier prepared above with an equal volume. After the impregnated material is washed with deionized water, it is dried at 110°C for 24 hours. Raise the temperature to 400°C, then raise the temperature to 450°C at a rate of 3°C / min, and bake at 450°C for 6 hours to prepare a catalys...

Embodiment 3

[0124] 1. Preparation of desulfurization adsorbent

[0125] 1) Preparation of alkali-treated molecular sieve and activated carbon

[0126] 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 4.

[0127] Table 4 The specific surface area and pore size of Y-type molecular sieve and activated carbon

[0128]

[0129] 2) Preparation of the first ...

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Abstract

The invention provides a quality improvement method of catalytic cracking gasoline. The quality improvement method comprises the following steps of: cutting a gasoline raw material into light, medium and heavy gasoline fractions; desulfurizing the medium gasoline fraction to obtain first desulfurized medium gasoline fraction; carrying out aromatization / hydroisomerization reaction on the first desulfurized medium gasoline fraction in the presence of a catalyst to obtain second desulfurized medium gasoline fraction; carrying out selective hydrodesulfurization on the heavy gasoline fraction to obtain desulfurized heavy gasoline fraction; mixing the light gasoline fraction, the second desulfurized medium gasoline fraction and the desulfurized heavy gasoline fraction to obtain quality improved 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 fraction is 70-130 DEG C. The quality improvement method provided by the invention can not only realize the deep desulfurization of the catalytic cracking gasoline, but also be used for outstandingly increasing the octane value.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, in particular to a method for upgrading the quality of catalytically cracked gasoline. Background technique [0002] Petroleum resources are becoming increasingly heavy and inferior, and environmental protection requirements are increasing. The world's new environmental protection regulations have stricter requirements on gasoline quality. For example, the national V motor gasoline standard that will be implemented on January 1, 2018 will require the olefin content to be below 24%, the sulfur content to be below 10ppm, and the octane number to be above 93. The improvement of gasoline quality standards is mainly manifested in: while the olefin content and sulfur content are further reduced, the octane number is increased. [0003] At present, developed countries mainly start from improving the "recipe" to meet the corresponding quality standards. They use a variety of processes to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/1037C10G2300/202C10G2400/02
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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