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Crude oil composite demulsifier and preparation method thereof

A technology of compound demulsifier and crude oil, applied in the direction of dehydration/demulsification by chemical method, processing of hydrocarbon oil, petroleum industry, etc. The effect of resistance reduction performance

Active Publication Date: 2020-08-07
王达 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the shortcoming that the function of the current crude oil demulsifier is relatively single, the present invention proposes a crude oil composite demulsifier, which has excellent demulsification performance and viscosity reduction performance at the same time

Method used

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  • Crude oil composite demulsifier and preparation method thereof
  • Crude oil composite demulsifier and preparation method thereof
  • Crude oil composite demulsifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 40g of triethanolamine, 360g of propylene oxide and 270g of ethylene oxide to the reaction kettle in order to carry out a copolymerization reaction under the conditions of 140°C and 40g of potassium hydroxide to obtain a polyether. After the copolymerization is completed, add 80g of acrylic acid to the reaction kettle for modification The modified polyether was obtained through the reaction, and the modified polyether was dissolved in 400 ml of methanol to obtain a modified polyether solution for use. Take another 1L of water, add 60g of citrate, 50g of sulfonic acid perfluoroalkyl surfactant and 80g of alkyl alcohol polyoxyethylene ether sulfonate in sequence to obtain a mixed solution, and each raw material needs to be completely dissolved in the previous raw material After adding: the modified polyether solution is added to the aforementioned mixed solution, and 20 g of potassium hydroxide is added at the same time, and the stirring is continued until a homogeneou...

Embodiment 2

[0020] Add 40g of triethanolamine, 380g of propylene oxide and 280g of ethylene oxide to the reaction kettle in order to carry out copolymerization under the conditions of 140°C and 40g of potassium hydroxide to obtain polyether. After the copolymerization, add 90g of acrylic acid to the reaction kettle for modification The modified polyether was obtained through the reaction, and the modified polyether was dissolved in 400 ml of methanol to obtain a modified polyether solution for use. Take another 1L of water, add 65g of citrate, 50g of sulfonic acid perfluoroalkyl surfactant and 100g of alkyl alcohol polyoxyethylene ether sulfonate in sequence to obtain a mixed solution, and each raw material needs to be completely dissolved in the previous raw material After adding: the modified polyether solution is added to the aforementioned mixed solution, and 20 g of potassium hydroxide is added at the same time, and the stirring is continued until a homogeneous liquid is obtained to o...

Embodiment 3

[0022] Add 40g of triethanolamine, 400g of propylene oxide and 280g of ethylene oxide to the reaction kettle in order to carry out copolymerization under the conditions of 140°C and 40g of potassium hydroxide to obtain polyether. After the copolymerization is completed, add 100g of acrylic acid to the reaction kettle for modification The modified polyether was obtained through the reaction, and the modified polyether was dissolved in 400 ml of methanol to obtain a modified polyether solution for use. Take another 1L of water, add 65g of citrate, 60g of sulfonic acid perfluoroalkyl surfactant and 100g of alkyl alcohol polyoxyethylene ether sulfonate in sequence to obtain a mixed solution, and each raw material needs to be completely dissolved in the previous raw material Add later; add the modified polyether solution to the above-mentioned mixed solution, add 20g of potassium hydroxide at the same time, and continue to stir until a uniform liquid is obtained to obtain the crude ...

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Abstract

The invention discloses a crude oil composite demulsifier and a preparation method thereof; the demulsifier comprises the following substances: 1000 parts of water, 40 to 50 parts of triethanolamine;350 to 450 parts of epoxypropane, 250 to 400 parts of ethylene oxide, 80 to 100 parts of acrylic acid, 50 to 60 parts of sulfonic acid perfluoroalkyl surfactant, 70 to 120 parts of alkyl alcohol polyoxyethylene ether sulfonate, 50 to 100 parts of citrate, 10 to 60 parts of inorganic base and 300 to 400 parts of organic solvent. The preparation method comprises the following steps: sequentially adding triethanolamine, propylene oxide and ethylene oxide for copolymerization to generate polyether, adding acrylic acid for reaction to obtain modified polyether, and dissolving the modified polyetherin an organic solution for later use; sequentially adding citrate, a sulfonic acid perfluoroalkyl surfactant and alkyl alcohol polyoxyethylene ether sulfonate into water; and adding the modified polyether solution into the mixed solution, adding inorganic base, and continuously stirring. The crude oil composite demulsifier provided by the invention not only has good demulsification performance oncrude oil, but also can provide good viscosity reduction performance and resistance reduction performance.

Description

technical field [0001] The invention relates to the technical field of oilfield chemical additives, in particular to a compound demulsifier for crude oil. Background technique [0002] Crude oil itself is a multi-component mixture consisting of hydrocarbons with different relative molecular masses and structures, and a small amount of non-hydrocarbon compounds. Because the crude oil system contains a large amount of colloid and asphalt, its fluidity is poor and its viscosity is very high, which brings a series of problems to crude oil production. During oilfield exploitation, crude oil flows in the formation and is easy to mix with formation water. Under the double shearing and stirring action of formation pores and blastholes, it is mixed into an emulsion, and the formed crude oil emulsion will increase the collected liquid flow rate and increase Mechanical wear and energy consumption during the conveying process. Therefore, the dual functions of viscosity reduction and d...

Claims

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Application Information

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IPC IPC(8): C10G33/04C08G65/332C08G65/28
CPCC10G33/04C08G65/3322C08G65/2624C10G2300/1033
Inventor 王达卢岩冯浦涌周福建李东元
Owner 王达
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