Catalytic cracking auxiliary agent and preparation method thereof

Abstract

The invention provides a catalytic cracking auxiliary agent and a preparation method thereof. The catalytic cracking auxiliary agent contains a mesoporous silica alumina material, a metal trapping agent and clay and / or heat-resistant inorganic oxide, wherein the mesoporous silica alumina material is obtained by the following steps of mix-pulping the mesoporous silica alumina material without ion exchange with water to obtain a slurry liquid; and contacting the slurry liquid with an inorganic acid for at least 0.2 hour at a temperature ranging from room temperature to 100 DEG C, so as to make the sodium oxide content in the mesoporous silica alumina material no higher than 0.2 wt%, wherein the weight ratio of the mesoporous silica alumina material without ion exchange, water and the inorganic acid is 1 : 5-30 : 0.03-0.3. The catalytic cracking auxiliary agent has relatively strong heavy oil cracking ability, high light oil yield and good coke selectivity when being used for the catalytic cracking of the heavy oil.

Description

technical field [0001] The invention relates to a catalytic cracking auxiliary agent and a preparation method thereof. Background technique [0002] The continuous rise of crude oil prices has greatly increased the processing costs of refineries. On the one hand, refineries can reduce costs by purchasing low-priced low-quality oil; on the other hand, they can increase economic benefits through deep processing of heavy oil. As an important means of heavy oil processing in refineries, catalytic cracking plays a pivotal role in refineries. It is not only the main means of heavy oil balance and clean fuel production in refineries, but also the focus of energy saving and efficiency enhancement in refineries. Therefore, more and more refineries have shifted their focus to the deep conversion of heavy oil, seeking to increase processing capacity and produce more high value-added products in order to maximize benefits. This means converting as much heavy crude as possible and reduc...

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Problems solved by technology

Among them, the best preparation method of the aluminosilicate compound mentioned in ① can be found in US5045519A. This patent uses aluminum alcohol salt as raw material, which is expensive and greatly increases the cost of additives.

[0005] It can be seen that the prior art is trying various methods that can improve the catalytic performance of the auxiliary agent. Although certain results have been obtained and the cracking of heavy oil has been promoted to a certain extent, the existing preparation of catalytic cracking auxiliary agent However, the method still has problems such as high cost, metal pollution resistance and heavy oil conversion ability to be improved.

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