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Environment-friendly type low temperature resistant crude oil demulsifier and preparation method thereof

A crude oil demulsifier and low-temperature-resistant technology, which is applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of poor performance, lower water removal rate, lower reclaimed water settling speed and settling time, etc. The preparation method is simple and easy , good low temperature resistance, good demulsification performance

Inactive Publication Date: 2015-08-05
无棣华信石油技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the poor performance of the existing demulsifiers, the settling velocity and settling time of the original reclaimed water are greatly reduced, and the water removal rate is also greatly reduced.

Method used

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  • Environment-friendly type low temperature resistant crude oil demulsifier and preparation method thereof

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Effect test

Embodiment 1

[0023] An environment-friendly low-temperature resistant crude oil demulsifier, including the following components in parts by weight: 28 parts of polyoxyethylene polyoxypropylene block polyether, 4 parts of imperina root, 2 parts of Sophora japonica, 0.2 part of sodium bicarbonate, magnesium sulfate 0.5 part, 1 part of oligosaccharide, 0.7 part of alginate, 0.1 part of aescin, 1 part of decyl glucoside, 0.5 part of cocamidopropyl betaine, 80 parts of water.

[0024] The preparation method of described environment-friendly low temperature resistant crude oil demulsifier comprises the steps:

[0025] Step 1: According to the mass ratio, mix the rhizome of Imperata corydalis and Sophora japonica evenly, crush it to 100 mesh, add it into water, ultrasonicate at 30°C for 3 hours, centrifuge, and take the supernatant to obtain the first extract;

[0026] Step 2, adding sodium bicarbonate, magnesium sulfate, and oligosaccharides to the first extract in sequence, and stirring evenly ...

Embodiment 2

[0030] An environment-friendly low temperature resistant crude oil demulsifier, including the following components in parts by weight: 49 parts of polyoxyethylene polyoxypropylene block polyether, 10 parts of imperina root, 5 parts of Sophora japonica, 0.6 part of sodium bicarbonate, magnesium sulfate 1 part, 3 parts of oligosaccharide, 1.5 parts of alginate, 0.2 part of aescin, 3 parts of decyl glucoside, 2.8 parts of cocamidopropyl betaine, 99 parts of water.

[0031] The preparation method of described environment-friendly low temperature resistant crude oil demulsifier comprises the steps:

[0032] Step 1: According to the mass ratio, mix the rhizome of Imperata corydalis and Sophora japonica evenly, crush it to 200 mesh, add it into water, ultrasonicate at 40°C for 1 hour, centrifuge, and take the supernatant to obtain the first extract;

[0033] Step 2, adding sodium bicarbonate, magnesium sulfate, and oligosaccharides to the first extract in sequence, and stirring evenl...

Embodiment 3

[0037] An environment-friendly low temperature resistant crude oil demulsifier, including the following components in parts by weight: 30 parts of polyoxyethylene polyoxypropylene block polyether, 5 parts of imperina root, 3 parts of Sophora japonica, 0.3 part of sodium bicarbonate, magnesium sulfate 0.5 parts, 2 parts of oligosaccharides, 0.9 parts of alginate, 0.1 parts of aescin, 1 part of decyl glucoside, 0.8 parts of cocamidopropyl betaine, 84 parts of water.

[0038] The preparation method of described environment-friendly low temperature resistant crude oil demulsifier comprises the steps:

[0039] Step 1: According to the mass ratio, mix the rhizome of Imperata corydalis and Sophora japonica evenly, crush it to 200 mesh, add it into water, ultrasonicate at 35°C for 2 hours, centrifuge, and take the supernatant to obtain the first extract;

[0040] Step 2, adding sodium bicarbonate, magnesium sulfate, and oligosaccharides to the first extract in sequence, and stirring e...

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Abstract

The invention relates to an environment-friendly type low temperature resistant crude oil demulsifier and its preparation method and belongs to the technical field of a demulsifier. The environment-friendly type low temperature resistant crude oil demulsifier comprises the following ingredients, by weight, 28-49 parts of polyoxyethylene-polyoxypropylene block polyether, 4-10 parts of imperata rhizome, 2-5 parts of sophora bud, 0.2-0.6 part of sodium bicarbonate, 0.5-1 part of magnesium sulfate, 1-3 parts of oligosaccharide, 0.7-1.5 parts of seaweed gel, 0.1-0.2 part of aescine, 1-3 parts of decyl glucoside, 0.5-2.8 parts of cocamidopropyl betaine and 80-99 parts of water. The demulsifier prepared in the invention has an excellent demulsification effect and can be used to effectively remove water with soluble salt in crude oil and remove residual water after desalination so as to settle residual water through aggregation. Water removal efficiency can reach up to 90-98%, and desalinization rate reaches up to 90-95%.

Description

technical field [0001] The invention belongs to the technical field of demulsifiers, and in particular relates to an environment-friendly low temperature resistant crude oil demulsifier and a preparation method thereof. Background technique [0002] Generally, the oil extracted from the underground oil layer contains water, and the water generally contains a large amount of inorganic salts. The crude oil will first be dehydrated and stabilized to remove most of the water and salt, and only through this process. Water removal is far from enough, because the desalination and dehydration of the oil field are often carried out at the same time. In order to remove the suspended salt particles in the crude oil, a certain amount of water needs to be injected into the crude oil to dissolve the suspended salt particles in the crude oil. removed in water. The above-mentioned principle of desalting particles is that after the salt particles and water are fully mixed, under the action ...

Claims

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Application Information

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IPC IPC(8): C10G33/04
Inventor 李瑞国
Owner 无棣华信石油技术服务有限公司
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