Preparation method of heavy oil aquathermolysis catalytic viscosity reducer with hydrogen-donating double-ligand structure

Abstract

The invention discloses a preparation method of a heavy oil hydrothermal cracking catalytic viscosity reducer with a hydrogen-donating double-ligand structure. Mix long-chain carboxylic acid, copper hydroxide and methanol, heat to 80-90°C, reflux and stir for 2-3 hours; add picoline dropwise, continue stirring for 0.5-1 hour; filter while hot, spin the filtrate and recover methanol to obtain Hydrogen-donating double-ligand structure heavy oil aquathermal cracking catalytic viscosity reducer; the molar ratio of long-chain carboxylic acid, copper hydroxide, picoline and methanol is (1-1.5): (0.8-1): (1.2-1.5 ): (8~10). The viscosity reducer can be used for hydrothermal cracking catalytic viscosity reduction of extra-heavy oil and super-heavy oil. The viscosity reduction effect is good at a temperature of 240 ° C. The preparation process is simple, and it has strong universality for different types of heavy oil. Good practicability and broad market application prospects.

Description

technical field [0001] The invention relates to a preparation method of a hydrothermal cracking catalytic viscosity reducer with a hydrogen-donating double-ligand structure used in the exploitation of heavy oil. Background technique [0002] With the reduction of high-quality 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, a suitable catalyst is given to the oil layer to irreversibly convert some heavy component macromolecules into small molecules. The viscosity is reduced and easy to extract. The technical key lies in the effective hydrothermal cracking catalytic viscosity reducer. [0003] Commonly used hy...

AI Technical Summary

Problems solved by technology

Due to the inductive effect and conjugation effect of the nitrogen on the pyridine ring, the ortho- and para-picolines can stabilize the charges at the ortho- and para-positions, so the ortho- and para-picolines have side chains α-H that are more active than toluene, and the ortho- and para-picolines There is no literature report on the use of picoline as a hydrogen donor in heavy oil catalytic cracking for viscosity reduction.