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Adsorption desulfurization method

An adsorption desulfurization and adsorbent technology, which is applied in the petroleum industry, hydrocarbon oil treatment, refined hydrocarbon oil, etc., can solve the problem of increasing the wear and deactivation process of the desulfurization adsorbent, the bed of the desulfurization adsorbent cannot reach the material level, Reduce the activity and stability of desulfurization adsorbents, etc., to reduce adverse effects, reduce regeneration frequency, and improve stability

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0007] In the process of practical application, it is not only the sulfur load on the desulfurization adsorbent that affects the activity of the desulfurization adsorbent, but also the colloid or coke precursor in raw gasoline will also have a great impact on the activity of the desulfurization adsorbent, making Decreased activity and stability of desulfurization adsorbent
In order to ensure that the activity of the desulfurization adsorbent is high enough, it is necessary to strengthen the regeneration intensity of the desulfurization adsorbent and increase the regeneration frequency. This measure further increases the wear and deactivation process of the desulfurization adsorbent.
At the same time, it is also found in practical industrial applications that due to various reasons, such as the decrease in the processing capacity of the device due to the decrease in the efficiency of the heat exchanger, or the decrease in the processing capacity of the device due to insufficient raw material sources, or the indicators such as the sulfur content of the raw material processed by the device are far from Lower than the design value, etc. lead to a significant reduction in the desulfurization adsorbent storage in the reactor of the device, resulting in the desulfurization adsorbent bed layer not reaching the material level required for normal circulation, making the reaction-regeneration cycle difficult

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preparation example Construction

[0033] According to the present invention, in order to enable the metal oxide component to attach more stably to the carrier of the adsorption desulfurization aid, the preparation method of the adsorption desulfurization aid preferably further includes loading the metal oxide component on the After being placed on the above-mentioned adsorption desulfurization aid carrier, the obtained adsorption desulfurization aid carrier loaded with metal oxide components is roasted. The conditions for the calcination may be the same as those for calcination of the carrier, or different, and generally include: the calcination temperature may be 400-750°C, preferably 500-700°C; the calcination time may be 0.1-10 hours, preferably 0.5 -5 hours.

[0034] According to the present invention, the desulfurization adsorbent can be a conventional choice in this field, for example, it can be a supported metal oxide adsorbent, a supported metal oxide loaded with a metal promoter, a sulfur conversion a...

preparation example 1

[0052] This preparation example is used to illustrate the adsorption desulfurization aid provided by the present invention and its preparation method.

[0053] Alumina (chemically pure, produced by Shandong Zibo Aluminum Factory, the same below) and silicon oxide (chemically pure, purchased from Shanghai Merrill Chemical Technology Co., Ltd., the same below) were mixed according to the mass ratio of 1:2, and then deionized Water is mixed and beaten to obtain a slurry with a solid content of 15% by weight, and the pH value of the slurry is adjusted with a solution of nitric acid (chemically pure, produced by Huantai County Shunxin Chemical Co., Ltd., the same below) with a volume concentration of 30% under stirring. To 5, continue to stir until a uniform sol is formed, and the sol is spray-dried and molded at a controlled tail gas temperature of 250°C and a spray pressure of 50 atmospheres to obtain microspherical solid particles. The prepared microspherical solid particles wer...

preparation example 2

[0055] This preparation example is used to illustrate the adsorption desulfurization aid provided by the present invention and its preparation method.

[0056] Aluminum oxide and silicon oxide are mixed according to the ratio of mass ratio 5:1, and then mixed with deionized water for beating to obtain a slurry with a solid content of 10% by weight, and the pH of the slurry is adjusted with a nitric acid solution with a volume concentration of 30%. Adjust the value to 2, and continue to stir until a uniform sol is formed. The sol is spray-dried and molded at a controlled tail gas temperature of 300°C and a spray pressure of 60 atmospheres to obtain microspherical solid particles. The prepared microspherical solid particles were dried at 120° C. for 2 hours, and then calcined at 700° C. for 0.5 hour to obtain adsorption desulfurization aid carrier particles with an average particle diameter of 100 μm. The pre-configured chromium nitrate aqueous solution with a mass concentration...

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Abstract

The invention provides an adsorption desulfurization method. The method comprises the step of carrying out contact reaction on sulfur-containing hydrocarbon oil, a hydrogen donor, a desulfurizer adsorbent and an adsorption desulfurization assistant, wherein the adsorption desulfurization assistant contains a metal oxide component which contains an adsorption desulfurization assistant carrier and is loaded on the adsorption desulfurization assistant carrier; the adsorption desulfurization assistant carrier is a mixture of aluminum oxide and silicon oxide; and the metal oxide component is selected from one or more of sodium oxide, potassium oxide, magnesium oxide, calcium oxide, titanium oxide, vanadium oxide, chromic oxide, manganese oxide, iron oxide, copper oxide, zinc oxide, zirconium oxide, lanthanum oxide, cerium oxide, praseodymium oxide and neodymium oxide. The desulfurization method provided by the invention has an excellent desulfurization effect.

Description

technical field [0001] The invention relates to a method for adsorption desulfurization. Background technique [0002] As people pay more and more attention to environmental protection, the restrictions on the sulfur content in light hydrocarbons used as fuels are becoming more and more stringent. Taking gasoline as an example, the European Union has stipulated that the sulfur content should not exceed 50 μg / g in 2005, and the Euro V gasoline standard planned to be implemented in 2010 stipulates that the sulfur content should be less than 10 μg / g. China's National III standard, which was implemented on December 31, 2009, stipulates that the sulfur content of gasoline should not exceed 150 μg / g, and plans to promote the implementation of the National IV standard with a gasoline sulfur content of no greater than 50 μg / g in 2014. [0003] The S Zorb gasoline adsorption desulfurization process has been rapidly promoted in refineries due to its characteristics of high desulfuriz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G25/00
CPCC10G25/003C10G2300/202C10G2300/4006C10G2300/4012C10G2300/4018C10G2300/80
Inventor 王文寿毛安国刘宪龙徐莉刘玉良
Owner CHINA PETROLEUM & CHEM CORP
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