A novel star-shaped wax crystal improver and its synthesis method

Abstract

The invention discloses a novel star-shaped wax crystal modifier and a synthetic method thereof. The molecular formula of the star-shaped wax crystal modifier is C [42+n (x+1)] H [70+2nx] O [35+n]. The synthetic method includes the steps: (1) respectively dissolving palmitic acid and beta-cyclodextrin in 2, 5-dimethyl-furan; (2) slowly adding ethyl dimethyl amino propyl carbodiimide into palmitic acid solution to form a mixed system, and hermetically placing and stirring the mixed system in an ice-water bath; (3) adding 4-(dimethylamino) pyridine into the mixed system; (4) slowly dropping beta-cyclodextrin solution into the solution, sealing the solution, and uniformly increasing reaction temperature to reach room temperature; (5) performing reaction for 25-30 hours and placing a product in a drying oven for drying after purification, separation and vacuum filtration. The wax crystal modifier has alkyl multi-branched star-shaped space structure characteristics, crystallization deposition of wax is effectively suppressed, and the synthetic method is reliable in principle, convenient to operate and wide in application prospect.

Description

technical field [0001] The invention relates to a star-shaped wax crystal improver (P-CD) capable of effectively inhibiting the crystal deposition of wax components in waxy crude oil and a preparation method thereof. Background technique [0002] Paraffin mainly refers to C20-C40 normal alkanes, a small amount of branched isoparaffins and a small amount of side chain cyclic alkanes, with a molecular weight range of about 260-500g / mol. As the temperature decreases, the solubility of paraffin in crude oil decreases sharply, and long-chain and large molecular weight alkanes will crystallize first, resulting in a significant increase in crude oil viscosity and poor fluidity. At the same time, wax crystals will slowly deposit on the pipe wall. As the thickness increases, it will affect the conveying capacity of the pipeline and even cause blockage. [0003] Wax crystal modifier (wax crystal modifier) ​​is a chemical reagent commonly used in oil fields. It can change the crystall...

AI Technical Summary

Problems solved by technology

As the temperature decreases, the solubility of paraffin in crude oil decreases sharply, and long-chain and high-molecular-weight alkanes will crystallize first, resulting in a significant increase in crude oil viscosity and poor fluidity

At the same time, wax crystals will slowly deposit on the pipe wall. As the thickness increases, it will affect the conveying capacity of the pipe and even cause blockage.

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