Preparation method of thickened oil aqua-thermolysis catalysis viscosity reducer with double structures of hydrogen supply and catalytic activity center

Abstract

The invention relates to a preparation method of a thickened oil aqua-thermolysis catalysis viscosity reducer with double structures of hydrogen supply and catalytic activity center. The preparation method is characterized by comprising the following steps of: 1) selecting raw materials, namely according to the mole ratio of dimethylbenzene to concentrated sulphuric acid to metal oxide to water of (1.5-2.5):(1.0-1.8): (0.3-0.6): (6-8), weighing the dimethylbenzene, the concentrated sulphuric acid, the metal oxide and the water; heating the dimethylbenzene to 100-120 DEG C, dropwise adding the concentrated sulphuric acid, and dripping off for 30-45 minutes; increasing the temperature to 130-150 DEG C, and continuing reaction for 2-3 hours; finishing the reaction and cooling to the room temperature, pouring the mixture solution into a liquid separation hopper, separating out the lower-layer solution to obtain a desired intermediate; and (3) mixing the metal oxide and water, adding the intermediate at 70-80 DEG C and stirring for 0.5-1h, filtering while being hot, drying the filtrate in a drying oven at 60-80 DEG C for 10-14 hours to obtain the product. The viscosity reducer prepared by adopting the method has a good viscosity reduction effect and is simple in preparation technique, and convenient and safe in site construction.

Description

technical field [0001] The invention relates to a preparation method of a novel hydrothermal cracking catalytic viscosity reducer used in heavy oil exploitation. Background technique [0002] Heavy oil is an unconventional hydrocarbon resource with great potential. my country is rich in heavy oil resources and is one of the four heavy oil countries. As the world's demand for oil resources increases, especially under the severe situation that my country's dependence on foreign crude oil imports has reached 60%, the comprehensive development and utilization of heavy oil has become one of the important measures to alleviate my country's oil energy demand, which is conducive to The healthy development of my country's energy economy. However, due to the complex molecular structure of heavy oil and the high content of heavy components, its viscosity and freezing point are high, and the composition, structure, and properties of heavy oil are ever-changing in different regions and ...

AI Technical Summary

Problems solved by technology

Adding catalytic viscosity reducer and additives such as hydrogen donor can improve the catalytic viscosity reduction effect of hydrothermal cracking of heavy oil, but in field application, due to the complexity of the construction process and the resulting The existence of problems such as hidden dangers and increased production costs have restricted the production technology of in-situ hydrogen supply modification and viscosity reduction of heavy oil by using the combination of hydrogen supply agent and catalytic viscosity reducer