Crude oil demulsifier and preparation method thereof

A crude oil demulsifier and demulsifier technology, applied in chemical instruments and methods, chemical dehydration/demulsification, dissolution, etc., can solve the complex production process, unsatisfactory demulsification and dehydration effects, production equipment, and production conditions. Higher problems, to achieve the effect of simple production process, clear oil-water interface, and enhanced ability to neutralize interface charges

Inactive Publication Date: 2009-09-30
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the production process is complicated, and the requirements for production equipment and production conditions are relatively high;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In the 1000L synthetic reactor, add 564Kg oleic acid. Slowly add 154Kg diethanolamine to the above synthesis reaction kettle, stir while adding, keep the temperature below 90°C, add 3.6g of toluene-4-sulfonic acid as a catalyst after adding diethanolamine, raise the temperature to 160-180°C for reaction 4 -5hr, fatty acid amide was obtained.

[0026] Take 45 parts of the above product fatty amide, add 5 parts of tetradecyltrimethylammonium bromide, 35 parts of ethanol, stir at 50°C until completely dissolved, add 15 parts of water, stir evenly, and obtain the product. The label is demulsifier CL-1.

Embodiment 2

[0028] In the 1000L synthesis reactor, add 684Kg palm oil. Slowly add 154Kg of diethanolamine to the above synthesis reaction kettle, stir while adding, keep the temperature below 90°C, add 4.2g of KOH as a catalyst after adding the diethanolamine, raise the temperature to 140-160°C and react for 4-5hr to obtain fatty acid amide.

[0029] Take 40 parts of the above-mentioned product fatty amide, add 5 parts of tetradecyltrimethylammonium chloride, 30 parts of isopropanol, stir at 50°C until completely dissolved, add 25 parts of water, and stir evenly to obtain the product. The label is demulsifier CL-2.

Embodiment 3

[0030] Embodiment 3: Turpan-Hami crude oil demulsification experiment

[0031] Use the Ministry of Petroleum SY5281-2000 crude oil demulsifier use performance test method (bottle test method) to measure the demulsification effect of the demulsifier. The experiment uses heavy oil from Well Yudong 202-1 in Tuha Oilfield, with a viscosity of 28000mPa.s (40℃) , belongs to super heavy oil, adding water makes the water content of crude oil reach 30%. Demulsifiers BPE2070, AP221, and SP169 were purchased from the market for comparison, and were available from Shandong Binzhou Chemical Factory.

[0032] The experimental results are as follows:

[0033] demulsifier temperature / ℃ Amount of demulsifier / mg / L Water content of crude oil after demulsification / mg / L Extracted water oil content / mg / L oil-water interface BPE2070 40 40 6.3 421 Transition layer thickness AP221 40 40 2.1 324 Not clear SP169 40 40 0.9 317 Not clear Example 1

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Abstract

The invention relates to a crude oil demulsifier and a preparation method thereof. The components of the demulsifier include fatty amide, cationic surfactant, organic solvent and water. The invention also provides a preparation method of the crude oil demulsifier. After the use of the demulsifier, the water content in the crude oil (mg/L) is greatly reduced, and the oil-water boundary is clear.

Description

technical field [0001] The invention relates to a crude oil demulsifier, in particular to the preparation of a demulsifier that can be used for demulsification and dehydration of crude oil in oilfields and refineries, and belongs to the technical field of oilfield chemistry. Background technique [0002] With the continuous development of oilfields and the application of various enhanced oil recovery methods, the problem of demulsification and dehydration of crude oil is becoming more and more complicated. The use of commonly used polyether demulsifiers often fails to achieve the desired effect. The large amount of chemical agents added in the oil recovery process has caused certain difficulties to the demulsification and dehydration of crude oil, which diversifies the emulsification state of the produced fluid. The phase state of the produced crude oil is not limited to W / O type, but also O / W type, W The multiple emulsions of / O and O / W emulsions are also called ferrule emu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04B01F17/22C09K23/22
Inventor 王彦玲李美蓉赵修太马莉郑晶晶
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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