Solid base catalyst and preparation method thereof

Abstract

The invention discloses a solid base catalyst and a preparation method thereof. The solid base catalyst is composed of an active component, an auxiliary agent, a molding auxiliary agent and a solid base catalyst carrier. The solid base catalyst carrier is a highly mesoporous catalytic carrier, and the solid base catalyst carrier is subjected to pore channel thickening treatment, transition metal doping and surface modification treatment, so that the hydrothermal stability of the catalyst is improved, parts of polar centers are eliminated, the adsorption capacity of the catalyst on polycyclic aromatic hydrocarbon and non-hydrocarbon impurities in heavy oil is reduced, and the service life of the catalyst is prolonged. The invention also provides a preparation method of the solid base catalyst, and microsphere, strip and spherical catalysts are prepared and used for fluidized bed catalytic cracking, fixed bed, moving bed and other reaction processes. When the solid base catalyst is used for treating heavy oil with the residual carbon content larger than 10 wt% and in the residual oil catalytic cracking process, the coke yield is smaller than 10 wt%, and the selectivity of low-carbon olefin in liquefied gas is larger than 80%.

Description

Technical field [0001] The present invention relates to a solid base catalyst and a preparation method. Background technique [0002] Solid alkali catalyst materials and solid base catalytic reaction studies have developed rapidly, using solid base catalysts for biodiesel preparation, olefin isomer, heavy oil conversion utilization and other fields into research hotspots, and the performance stable and reliable base catalyst and preparation method is key technologies. [0003] With the increasing depletion of light oil resources world, the trend of heavy oil in the world has enable refinery to convert heavy residue into light, high-priced products, especially in China's crude oil, inferiorization The trend is more obvious. Common technologies conversion to heavy oil into light oil are catalytic cracks, and catalytic cracking devices occupy an important position in China's refining industry. Catalytic cracking technology has become one of the most important oil secondary processin...

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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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