Hydrocracking technology for increase production of low solidifying point diesel oil and ethylene producing raw material

Abstract

A hydrocracking process for increasing the output of low-setting-point diesel oil and the raw material used to prepare ethylene features that the Y-zeolite hydrocracking catalyst for bearing the cracking load of 50-90 wt% of petroleum hydrocarbon and the beta-zeolite one for bearing that of 10-50 wt% of petroleum hydrocarbon are hierarchically filled.

Description

technical field [0001] The invention relates to a hydrocracking process, which is used for processing heavy petroleum hydrocarbon materials, producing more low-condensing-point diesel oil and producing ethylene materials at the same time. Background technique [0002] Hydrocracking is one of the main refining processes to produce high-quality light oil products from inferior heavy distillate oil. Because the hydrocracking process can meet the increasingly stringent environmental protection requirements, especially the production of jet fuel and clean diesel products that are urgently needed by the market, the technology of this process has developed rapidly. For hydrocracking units aiming to produce jet fuel and clean diesel in the largest quantities, the selectivity of the catalyst is very important. [0003] The cracking catalyst for hydrocracking is currently using Y-type zeolite as the main cracking component. The Y-type hydrocracking catalyst has good ring-opening acti...

AI Technical Summary

Problems solved by technology

Because β zeolite and Y zeolite have their own suitable reaction substances, for example, Y zeolite has a strong ring-opening ability for aromatic rings, and β zeolite has strong functions for breaking side chains of aromatic hydrocarbons, isomerization of chain hydrocarbons, and selective cracking of long carbon chain hydrocarbons. , and along the reactant flow direction, the relative concentrations of different types of substances at different axial positions are different, so the composite component cannot make the different components at the maximum concentration of their suitable reaction substances, which reduces the utilization efficiency of the catalyst

In addition, since the optimum reaction conditions of the two components are also different, they cannot be reacted under their respective optimum conditions when combined together.