Hydrocracking catalyst carrier and preparation method thereof

Abstract

The invention discloses a hydrocracking catalyst carrier and a preparation method thereof. The catalyst carrier comprises a modified Y-type molecular sieve, amorphous silica-alumina and alumina, wherein the modified Y-type molecular sieve is Y-type molecular sieve treated by mixed aqueous solution of an aluminum salt and an acid and by hydrothermal process. In the carrier, the modified Y-type molecular sieve has a high crystallinity, high silicon to aluminum ratio and proper total acidity and acid distribution and can form an acid component with the amorphous silica-alumina. Therefore, the carrier is particularly suitable for serving as a hydrocracking catalyst carrier to improve the activity of a hydrocracking catalyst and the selectivity of middle distillates.

Description

A kind of hydrocracking catalyst carrier and its preparation method technical field The invention relates to a catalyst carrier and a preparation method thereof, which is particularly suitable as a hydrocracking catalyst carrier. Background technique The carrier is an important part of the catalyst. It not only provides a place for the metal active components to disperse, but also participates in the reaction itself, and completes the entire catalytic reaction together with other active components. Existing hydrogenation catalyst supports generally contain molecular sieves, alumina, and other refractory oxides, and are generally used in processes such as hydrocracking of heavy oil, hydrogenation of distillate oil to remove impurities, and hydrogenation of inferior diesel oil. With the recovery and development of the world economy, the demand for high-quality middle distillate oil products (that is, the power fuel of the aviation industry: jet fuel, and the main power fuel...

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Problems solved by technology

Using aluminum salt alone can also partially remove the non-framework aluminum formed after hydrothermal treatment, but because the pH value of the aluminum salt solution is generally between 2 and 3, it is not enough to remove a large amount of non-framework aluminum, so that part of the aluminum in the micropores The difficult-to-remove non-skeleton aluminum remains in the molecular sieve, which causes partial acid centers of the molecular sieve to be masked, and also affects the distribution of B acid and L acid, making it difficult to maximize the cracking performance of the molecular sieve

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