A kind of catalytic cracking anti-metal liquid enhancer and preparation method thereof

Abstract

Provided are an anti-metal liquid yield booster for catalytic cracking and a preparation method therefor. The liquid yield booster is composed of a VPI-5 molecular sieve, and an antimony-based nickel passivator and a heteropoly acid together loaded in a pore channel thereof, wherein the mass fractions of the components are: 70-98% of a VPI-5 molecular sieve; 0.5-20% of an antimony-based nickel passivator; and 1-10% of heteropoly acid. With the anti-metal liquid yield booster of the present invention, a nickel-porphyrin compound can be concentrated in the pore channel of the VPI-5 for a cracking reaction, and the resulting metal nickel is controlled to remain in the pore channel of the VPI-5, such that the toxicity thereof to a catalytic cracking catalyst is reduced, and furthermore, the nickel element is more quickly exposed and reacted with the nickel passivator, and this is favorable for improving the reaction selectivity and reducing the generation of coke, and there is increased production of liquid products such as gasoline and diesel oil.

Description

technical field [0001] The invention belongs to the field of petroleum catalytic cracking additives, and in particular relates to a catalytic cracking anti-metal liquid enhancer and a preparation method thereof. Background technique [0002] Catalytic cracking is an important deep processing technology for lightening heavy oil. The processing volume of catalytic cracking in my country accounts for more than 35% of the total heavy oil processing, of which 80% of gasoline and 30% of diesel come from catalytic cracking. The catalytic cracking process is a process in which heavy oil undergoes a cracking reaction under the action of high temperature and a catalyst, and is transformed into components such as liquefied petroleum gas, cracked naphtha, gasoline and diesel. Therefore, the catalyst is one of the most important factors in the catalytic cracking process. [0003] At present, my country's fluid catalytic cracking (FCC) catalysts mainly include rare earth-Y molecular sie...

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Problems solved by technology

[0006] The invention provides a catalytic cracking anti-metal liquid builder and a preparation method thereof to solve the problem of generating Sb from the reaction of passive nickel agent and nickel in the prior art x Ni y After alloying, it is easy to block the pores of Y-type molecular sieve, thus affecting the performance of nickel resistance

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