Preparation method for oil-soluble thickened oil hydrothermal catalytic cracking viscosity breaking agent

Abstract

The invention relates to a preparation method for oil-soluble thickened oil hydrothermal catalytic cracking viscosity breaking agent, which is characterized by comprising the following steps of: 1) choosing raw materials at the following ratio: 3-5g of gallic acid, 5-10ml of halogenated hydrocarbon, 10-100ml of organic solvent, 8-15g of anhydrous carbonate, 80-100ml of aqueous alkali with the concentration of 2-5mol/L, 100ml of absolute methanol and 3-7g of nickel salt for later use; 2) preparing oil-soluble catalyst viscosity breaking agent: respectively adding the gallic acid, the halogenated hydrocarbon and the anhydrous carbonate into a round bottom flask; then adding the organic solvent; introducing nitrogen into the round bottom flask; carrying out thermal stirring and backflow for 12-24h at the temperature of 50-70 DEG C; filtering the obtained product; carrying out reduced pressure distillation to obtain transparent oily liquid; dissolving the product into the absolute methanol; adding aqueous alkali; carrying out backflow for 3h at the temperature of 30-50 DEG C; hydrolyzing the product; carrying out reduced pressure distillation to obtain methyl alcohol; slowly dipping diluted hydrochloric acid into the solution until the pH value of the solution is 7-8; then, slowly dipping nickel salt solution; stirring for full reaction and filtering and drying to obtain nattier blue powder, i.e. the oil-soluble catalyst viscosity breaking agent. The viscosity breaking agent has the characteristics of good viscosity breaking effect, strong popularity and simple preparation process.

Description

A kind of preparation method of oil-soluble heavy oil aquathermolysis catalytic viscosity reducer technical field The invention relates to a preparation method of an oil-soluble heavy oil hydrothermal cracking catalytic viscosity reducer, which belongs to the field of petroleum exploitation chemistry. Background technique With the continuous increase of heavy oil production, the high viscosity and high content of colloidal asphaltenes of heavy oil have brought great difficulties to its storage and transportation. Therefore, the rationality, advancement and economy of heavy oil transportation technology directly affect the original comprehensive technical indicators of production. There are more or less problems in some traditional viscosity reduction methods, which cannot meet the needs of production. Canadian scientists Hyne and others first proposed the concept of hydrothermal cracking reaction in 1983. They found that heavy oil in oil sands undergoes a series of react...

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Problems solved by technology

Many literatures at home and abroad have mentioned that the hydrothermal cracking reaction adopts a temperature of 240°C or higher, but due to the heat loss during the steam injection process and the heterogeneity of the formation, the oil layer usually cannot reach such a temperature

In addition, the oil solubility of the usual catalyst is not good, so that the catalyst cannot be fully contacted with crude oil, which affects the catalytic efficiency and cannot achieve a good viscosity reduction effect, especially under alkaline conditions, the transition metal ion as a catalyst is easy to precipitate