Catalytic cracking addition agent with high productivity of propylene and preparation method thereof

Abstract

The present invention discloses a catalytic cracking assistant for high propylene yield and a preparation method thereof, which pertains to the hydrocarbon oil catalytic cracking assistant catalyst and is characterized by being composed of the following components (wt / %): 10-60 polybasic organic acid modified ZSM-5 molecular sieve, 10-40 Al2O3, 1-20 P (counted by P element), 1-15 rare earth element (counted by RE2O3) and 5-40 clay. Compound use of the assistant and catalytic cracking catalysts in the invention is fit for heavy hydrocarbon oil and hydrocarbon oil of catalytic cracking raw materials from various sources. The catalytic cracking assistant has good propylene selectivity, high catalytic cracking conversion rate, high liquefied gas yield, high propylene content in the liquefied gas and no dry gas or coke increase and greatly improves hydro-thermal activity stability of the main catalyst, thus is an ideal catalytic cracking assistant for high propylene yield.

Description

Technical field

[0001] The invention is a catalytic cracking aid with high propylene yield and a preparation method thereof. It is an auxiliary catalyst for the catalytic cracking of hydrocarbon oil. Background technique

[0002] Propylene is the basic chemical raw material for organic synthesis, especially the synthesis of polymer materials. The market demand is increasing year by year, and it plays an important role in the development of the national economy. In the prior art catalytic cracking production process, propylene is present in the liquefied petroleum gas as a by-product of the production of gasoline and light diesel. Therefore, increasing the propylene content in the liquefied gas is the key to increasing the propylene yield in the hydrocarbon oil catalytic cracking unit. C in liquefied gas 4 , C 5 Distillate is burned as fuel, which not only wastes precious non-renewable energy, but also pollutes the environment. If it can be converted into propylene products req...