Comb copolymer, preparation method and application thereof

Abstract

The invention relates to a comb copolymer, a preparation method and application thereof, in particular to the preparation of a functional comb copolymer by a method of free radical solution polymerization and group modification and the application of the comb copolymer in pipeline transportation and offshore production of wax-containing crude. The structural formula of the comb copolymer is shown in the specification, wherein the molecular weight of the comb copolymer is 3,000 to 30,000g / mol; and the degree of esterification or amination is 0.5 to 2.0.

Description

technical field The present invention relates to a kind of comb polymer, preparation method and application thereof, in particular to prepare a kind of functionalized comb copolymer by means of free radical solution polymerization and group modification and apply it to the pipeline of waxy crude oil Transportation and deep sea oil extraction. Background technique As we all know, crude oil is a very complex mixture, mainly containing light hydrocarbon components, aromatic compounds, waxes, asphaltenes, colloids and other substances. The wax content of most crude oil is about 1 to 30%, and some are even as high as 45%. More than 80% of the crude oil produced in my country is high-wax crude oil, the wax content is about 15-37%, and the wax content of some crude oil is more than 40%. Since the solubility of wax in crude oil will decrease with the decrease of temperature, when the temperature is lower than the freezing point of wax, wax will precipitate to form wax crystals. T...

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Problems solved by technology

The physical methods mainly include: (1) heating method, which improves the fluidity of crude oil by heating the crude oil, but this method consumes a large amount of fuel, and has high investment and operation costs; After transportation, use mechanical means such as rubber balls to clean the pipeline. This method is a treatment method after waxing, which requires a large technical investment and high operating costs. According to the estimate of the US Department of Energy, the cost of repairing a 400-meter-undersea pipeline is 1 million USD / km; (3) chemical method, adding a small amount of chemical substances to crude oil that can effectively reduce the freezing point and viscosity of crude oil; this is a preventive method with less consumption and low cost

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