Preparation method of viscous oil hydrothermal cracking catalysis viscosity reducer having double structures of hydrogen supply and metal catalysis center

Abstract

The present invention discloses a preparation method of a viscous oil hydrothermal cracking catalysis viscosity reducer having double structures of hydrogen supply and metal catalysis center. The preparation method comprises: heating tetrahydronaphthalene to a temperature of 145-155 DEG C, adding concentrated sulfuric acid in a dropwise manner within 1 h, carrying out sulfonation, heating to a temperature of 155-165 DEG C, reacting for 2-3 h to obtain a tetrahydronaphthalene sulfonation product, adding water to the obtained tetrahydronaphthalene sulfonation product, adding a metal oxide, reacting for 1-1.5 h at a temperature of 105-115 DEG C, filtering, and evaporating to obtain the viscous oil hydrothermal cracking catalysis viscosity reducer having the double structures of hydrogen supply and metal catalysis center, wherein the metal oxide is any one selected from chromium oxide, ferric oxide, and nickel oxide. According to the present invention, the catalysis viscosity reducer has the hydrogen supply function, such that the hydrogen protons can be provided while the catalytic viscosity reducer catalyzes the cracking of the viscous oil macromolecule; and the chromium, iron or nickel metal center provides the catalytic cracking effect so as to effectively reduce the viscosity of the viscous oil and improve the quality of the viscous oil.

Description

technical field [0001] The invention belongs to the technical field of heavy oil exploitation, and in particular relates to a method for preparing a heavy oil hydrothermal cracking catalytic viscosity reducer with a double structure of hydrogen supply and metal catalytic center. Background technique [0002] With the reduction of conventional oil reserves, more and more attention has been paid to the exploitation of abundant heavy oil. However, due to the complex molecular structure, high content of heavy components, high freezing point and high viscosity of heavy oil, its exploitation is still a difficult problem in the world. Hydrothermal cracking catalytic viscosity reduction is a very potential ultra-heavy oil recovery method. While injecting steam, add a suitable catalyst to the oil layer to irreversibly convert part of the heavy component macromolecules into small molecules, so that Its viscosity is reduced and it is easy to extract. The key to this technology lies i...

AI Technical Summary

Problems solved by technology

However, in practical applications, the combined use of hydrogen donors and catalytic viscosity reducers will bring certain difficulties to construction equipment and construction techniques