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A method for deep desulfurization of gasoline

A technology for deep desulfurization and gasoline, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of unqualified mercaptan sulfur, unable to meet technical requirements, and no existing problems, and achieves reduction of reaction severity, Octane number and hydrogen consumption optimization, the effect of less olefin saturation

Active Publication Date: 2016-09-07
PETROCHINA CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

Its advantage is that it does not need fractional distillation to process full-fraction FCC gasoline. The disadvantage is that most of the residual sulfides in the final product are mercaptan sulfur compounds, which leads to unqualified mercaptan sulfur in the product
Its disadvantage is that it cannot meet the technical requirements of refineries to produce clean gasoline with a sulfur content of ≯10μg / g
[0008] To sum up, from the retrieval of patent documents, the currently researched and applied gasoline hydrodesulfurization technology is mainly used to produce products with a sulfur content of ≯150μg / g, but no products with a sulfur content of ≯10μg / g have been seen. technology reports

Method used

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  • A method for deep desulfurization of gasoline

Examples

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Effect test

Embodiment 1

[0028] Weigh 100g of pseudo-boehmite, add 2.5g of fenugreek powder, then add 3% nitric acid aqueous solution, knead and extrude, dry at 120°C for 4h, and then roast at 650°C for 4h to obtain the catalyst carrier. Test the water absorption rate of the carrier according to the conventional method, and then follow the equal volume impregnation method to configure the active component impregnation solution according to the water absorption rate of the carrier. First weigh 40ml of ammonia water, then add 35g of nickel acetate and 30g of nickel nitrate and stir until dissolved, and finally use ammonia water to make up the volume. The carrier is impregnated by the equal volume impregnation method, so that the catalyst carrier can fully absorb the impregnation solution of the active component, and after standing for 12 hours, the catalyst is dried at 120°C for 4 hours, and calcined at 500°C for 4 hours to obtain the catalyst sample used in the third reactor Cat-1#.

Embodiment 2

[0030]According to the preparation method of the carrier in Example 1, 100 g of the catalyst carrier was prepared, and then the active component impregnating solution was prepared, and the preparation method was the same as that of Example 1. First weigh 45ml of ammonia water, then add 7g of ammonium molybdate and 58g of nickel nitrate in turn and stir until dissolved, and finally use ammonia water to make up the volume. The impregnation method, drying and roasting conditions of the metal active components were the same as in Example 1, and the catalyst sample Cat-2# was obtained.

Embodiment 3

[0032] The used gasoline raw material of embodiment 3 is identical with comparative example. The gasoline raw material first enters the first reactor to remove diolefins while the mercaptan is heavy, and then enters the fractionation tower to cut into light and heavy gasoline (cutting temperature 60°C), and the obtained heavy gasoline passes through the second reactor to remove most After part of the sulfide, it enters the third reactor for further hydrodesulfurization of mercaptans, sulfides, disulfides and thiophene sulfur in the hydrodesulfurization product, and the obtained heavy gasoline hydrodesulfurization product is mixed with light gasoline to obtain Clean gasoline products. Wherein, the catalyst used in the first reactor and the catalyst used in the second reactor are the same as the comparative example, and the catalyst used in the third reactor is Cat-1# developed in Example 1. The operating conditions are shown in Table 3.

[0033] Table 3 Operating process cond...

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Abstract

The invention relates to a deep desulfurization method of gasoline. A gasoline raw material firstly enters a first reactor to remove dialkene and simultaneously mercaptan becomes heavier; the gasoline raw material then enters a fractionating tower to be cut and fractioned into light and heavy gasoline; heavy gasoline enters a second reactor to remove the vast majority of sulfide, and a reaction product enters a third reactor to further undergo desulfurization; and a heavy gasoline hydrodesulfurization product obtained is mixed with the light gasoline so as to obtain a qualified gasoline product. By additionally arranging the third reactor after the second reactor, further deep desulfurization is realized. Meanwhile, reaction severity of the second reactor is remarkably reduced, and octane number loss and hydrogen-consumption optimization are realized.

Description

technical field [0001] The invention relates to a method for deep desulfurization of gasoline, in particular to a method for organically combining three reactors for deep desulfurization of gasoline. Background technique [0002] Petroleum is one of the most important energy sources and has become the "blood" of today's world economic development. With the rapid development of the global economy, car ownership is increasing day by day. As of September 2011, the number of cars in the world has exceeded 1 billion, and the number of cars in my country has also exceeded 100 million for the first time. Automobile exhaust has become the main source of air pollution in many cities, seriously affecting people's production, life and health. At present, environmental protection laws and regulations are becoming increasingly stringent, countries all over the world have put forward higher and higher requirements for the quality of vehicle engine fuel, and my country has also accelerate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/1088C10G2300/202C10G2300/70
Inventor 兰玲鞠雅娜金辰张学军钟海军赵秦峰葛少辉袁晓亮吴平易鲁旭刘坤红朴佳锐梅建国
Owner PETROCHINA CO LTD
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