Preparation method of in-situ crystallization catalytic cracking catalyst

Abstract

The invention provides a preparation method of an in-situ crystallization catalytic cracking catalyst. Specifically, an in-situ crystallization process is adjusted, that is, the method comprises the steps of firstly mixing roasted soil balls and a sodium hydroxide solution for crystallization, and directly adding a guiding agent for crystallization without adding any external silicon sources to directly obtain an in-situ crystallization product with high crystallinity, a large pore volume and a low bulk density, and the method provided by the invention avoids a conventional method of adding special functional components into kaolin microspheres to improve a pore structure and improve crystallinity; the method provided by the invention reduces the production costs of the in-situ crystallization product, specifically, the raw material costs are low, and additional silicon sources are not required to be added; in the synthetic process, the liquid-solid ratio is reduced, and the single-kettle yield is increased; and after the in-situ crystallization product is modified by rare earth, the conversion rate of heavy oil can be increased, and the yield of a target product is increased.

Description

technical field [0001] The invention relates to a preparation method of a catalytic cracking catalyst, in particular to a preparation method of an in-situ crystallization catalytic cracking catalyst with low cost, relatively high crystallinity, pore volume and small bulk ratio. Background technique [0002] The rapid growth of the national economy has prompted my country's increasing dependence on imported crude oil, and the shortage of oil has increasingly become a "bottleneck" restricting my country's economic development. Therefore, how to effectively utilize the existing petroleum resources has become a major issue that needs to be solved urgently in the refining and chemical industry. The quality of domestic crude oil is poor, and the trend of heavy and inferior quality is very obvious, and the fraction above 350 °C exceeds 70%. With the further increase of oilfield exploitation depth, the trend of heavy crude oil will become more serious, and the proportion of vacuum ...

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Problems solved by technology

However, the patent does not mention the production amount of the by-product non-situ crystallization product (white powder) in the in-situ crystallization product

However, according to the principle of in-situ crystallization, the serious impact caused by the addition of aluminum source is the non-in-situ crystallization product, and the content of white powder is greatly increased, which will have a great impact on the operation in subsequent industrial production and the discharge and treatment of production sewage.

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