A kind of solid base catalyst and preparation method thereof

Abstract

The invention discloses a solid base catalyst and a preparation method thereof. The solid base catalyst of the present invention consists of active components, auxiliary agents, forming aids and solid base catalyst carriers. The solid base catalyst support is a highly mesoporous catalytic support. The solid base catalyst support has undergone pore thickening treatment, transition metal doping, and surface modification treatment to improve the hydrothermal stability of the catalyst and eliminate some polar centers. Reduce the catalyst's ability to adsorb polycyclic aromatic hydrocarbons and non-hydrocarbon impurities in heavy oil, and increase the life of the catalyst. The invention also provides a preparation method of the solid base catalyst to prepare microsphere, strip and spherical catalysts, which are used in reaction processes such as fluidized bed catalytic cracking, fixed bed and moving bed. The solid base catalyst of the present invention has a coke yield of less than 10wt% and a selectivity of low-carbon olefins in liquefied gas greater than 80% during the catalytic cracking process of heavy oil and residual oil with a residual carbon content greater than 10wt%.

Description

technical field [0001] The invention relates to a solid base catalyst and a preparation method. Background technique [0002] The research on solid base catalyst materials and solid base catalytic reactions has achieved rapid development. The use of solid base catalysts in the fields of biodiesel production, olefin isomerization, and heavy oil conversion and utilization has become a research hotspot. Base catalysts with stable and reliable performance and their preparation methods are key technologies. [0003] With the depletion of light oil resources worldwide, the trend of heavy crude oil in the world has made refineries increasingly desire to convert heavy residue oil into light and high-priced products, especially the heavy and inferior crude oil in my country. The trend is more obvious. The common technology for converting heavy oil into light oil is catalytic cracking, and catalytic cracking units occupy an important position in my country's oil refining industry. Du...

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Problems solved by technology

[0006] The solid base catalyst disclosed in patent CN109663585A is used in the field of biodiesel preparation, and the catalyst particles are prepared by grinding method, and the mechanical strength of the catalyst cannot meet the requirements of industrial cracking units for the catalyst

Although CN107115853A and CN101755036 introduce basic centers into catalytic cracking reactions, the catalysts have poor high-temperature stability, low resistance to metal and non-hydrocarbon impurities, and cannot stably process full-fraction residues and oils with high residual carbon content for a long period of time. Super heavy oil such as sand bitumen

However, the existing solid base catalysts generally have poor stability problems. For example, hydrotalcite solid base catalysts gradually transform into low-activity spinel structures under high temperature conditions, and it is difficult to process low-quality heavy oil with high carbon residues. Therefore, it is necessary to develop a Inferior heavy oil alkali catalysts with excellent structural properties have good application prospects

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