Preparation method of biological drag reducer for conveying high-freezing-point and high-viscosity crude oil
A drag reducer, biological technology, applied in the field of preparation of biological drag reducer for high-condensation and high-viscosity crude oil transportation, can solve the problems of high energy consumption, lack of ecological sustainability, toxic by-products, etc. Performance, less risky effect
Active Publication Date: 2022-07-01
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology
[0004] The purpose of the present invention is to provide a method for preparing a biological drag reducer for the transportation of high-condensation and high-viscosity crude oil, which is used to solve the problem of existing chemical drag reducers relying on the preparation of fossil fuels and chemical catalysts, ecological sustainability Lack of and high energy consumption, especially the production of toxic by-products and the quantitative characterization of crude oil drag reduction comprehensive performance
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Embodiment 1
[0054] Adopt the preparation method of the biological drag reducing agent for high-point and high-viscosity crude oil transportation according to the present invention:
[0055] Dodecanoic acid (C 12 H 24 O 2 ) and glycerol (C 3 H 8 O 3 ), immobilized lipase with a mass fraction of 0.5% was added, and the reaction was carried out at a temperature of 70 ° C for 30 hours. The waxy crude oil with a water content of 75% has a freezing point of 30.2 °C, a viscosity of 172.7 mPa.s at 40 °C, a wax precipitation point of 40 °C, and a wax content of 23.7%.
[0056] figure 2 The relative activity of lipase immobilized by the carrier-binding method varies with temperature, and it can be seen that the highest yield is 91% at 70°C. At the same time, the generation of water during the esterification preparation of biological drag reducing agent is beneficial to activate the activity of the enzyme, but the excessive accumulation of water will cause the reaction to reach equilibrium i...
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Abstract
The invention relates to a method for preparing a biological drag reducer for conveying high-coagulation and high-viscosity crude oil, which comprises the following steps of: preparing the biological drag reducer by using a biological drag reducer preparation device and a bio-based raw material, slowly adding dodecanoic acid and glycerol into a tank type stirring reactor, adding immobilized lipase according to a mass fraction of 0.5%, and stirring for 1-2 hours; the method comprises the following steps of: controlling the temperature in a kettle type stirring reactor to be 60-80 DEG C, reacting lauric acid and glycerol for 30 hours under the catalytic action of immobilized lipase, and generating the biological drag reducer through esterification reaction: when the reaction is carried out, carrying out reverse osmosis reaction on lauric acid and glycerol through a reverse osmosis membrane cylinder connected with an exhaust port at the upper end of the kettle type stirring reactor, and removing moisture in the azeotrope generated in the reaction process, and returning other components in the azeotrope to the kettle type stirring reactor through the liquid collecting funnel again for continuous reaction. The method is used for solving the problems that an existing chemical drag reducer is prepared by relying on fossil fuel and chemical catalysts, ecological sustainability is insufficient, and energy consumption is high.
Description
Technical field: [0001] The invention relates to a drag reducing agent used in the pipeline transportation process of high-point and high-viscosity crude oil, in particular to a method for preparing a biological drag-reducing agent for high-point and high viscosity crude oil transportation. Background technique: [0002] Crude oil pipeline transportation is favored for its economy, environmental protection, high efficiency and reliability. By the beginning of 2021, the total mileage of crude oil pipelines in the world has exceeded 420,000 kilometers, and the total mileage of crude oil pipelines in my country has reached 31,000 kilometers. Most of the crude oil produced in my country's oilfields is waxy crude oil or heavy oil. Due to the compositional properties of high wax content, high colloid, and asphaltene content, these crude oils have high freezing point and high viscosity, which means they belong to high coagulation and high viscosity. There is a strong dependence on h...
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IPC IPC(8): C12P7/64F17D1/17B01D36/00
CPCC12P7/6454F17D1/17B01D36/00
Inventor 戚向东王志华刘文波成庆林洪家骏许云飞
Owner NORTHEAST GASOLINEEUM UNIV
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