Complex catalyst for viscosity reduction of thick oil by hydrothermal catalytic cracking and preparation and application thereof

Abstract

The invention relates to a complex catalyst for viscosity reduction of thick oil by hydrothermal catalytic cracking and application thereof. The complex catalyst is prepared by the following steps of: 1) selecting raw materials: selecting 2 to 3 mass parts of C12-C18 aliphatic carboxylic acid, 1 to 2 mass parts of ethylene dimine, 3 to 5 mass parts of sodium fluoroacetate, 1 to 2 mass parts of sodium hydroxide, 3 to 5 mass parts of nickel chloride hydrate and 140 to 180 mass parts of toluene; and 2) mixing the C12-C18 carboxylic acid and ethylene dimine, then heating to 160 to 180 DEG C in anoil bath and reacting for 2 to 3 hours, cooling to 90 to 95 DEG C, adding sodium chloroacetate-containing aqueous solution, stirring, reacting for 40 to 50 minutes and then adding NaOH, continuously reacting for 10 to 13 hours at the temperature of between 90 and 100 DEG C, finally adding the NiCl2.6H2O and the toluene, refluxing and splitting water for 3 to 5 hours and filtering, and performing reduced pressure desolvation on the filtrate to obtain the catalyst, wherein after the reaction is finished, the viscosity reduction rate of the thick oil reaches over 90 percent, and 9 to 15 percent of heavy component is cracked into a light component.

Description

Technical field: [0001] The invention relates to a complex catalyst for reducing viscosity by hydrothermal catalytic cracking of heavy oil, and its preparation and application. Background technique: [0002] Hydrothermal catalytic cracking is a more effective method for heavy oil exploitation. The technique of hydrothermal catalytic cracking to reduce viscosity for heavy oil exploitation is to inject high-temperature and high-pressure steam into the oil layer while adding appropriate catalysts and other additives to use the formation itself as An inexpensive and available hydrothermal cracking catalytic reactor enables the catalytic cracking of heavy oil under hydrothermal conditions, irreversibly reducing the content of heavy components or changing its molecular structure, and to a certain extent, lighten the heavy oil and reduce The viscosity of heavy oil makes it easy to exploit, gather and process. This is a new idea for heavy oil exploitation. Hydrothermal catalytic cracki...

AI Technical Summary

Problems solved by technology

These viscosity reducers have the disadvantages of high use temperature, poor universality, poor contact with crude oil, and high concentration, so it is difficult to be effective in field application