Demulsifier

A technology of demulsifiers and additives, applied in the field of demulsifiers, can solve the problems of difficult to achieve the purpose of demulsification and dehydration of oil-water emulsions in oilfields, poor demulsification ability, complex types of water emulsions, etc.

Inactive Publication Date: 2006-10-18
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the water content of crude oil produced in most oilfields is high, even exceeding 80%. In addition, due to the implementation of enhanced oil recovery and high asphaltene content in some crude oil, the type of oil-wate

Method used

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Examples

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Effect test

Embodiment 1

[0019] 37.5 grams (21 parts) of petroleum sulfonate acidification products are put into a 250ml conical flask, add 125 grams (70 parts) of absolute ethanol, and slowly add 16 grams (9 parts) of N, N'-bis(dec Dialkylmethyl)-hexamethylenediamine, after the solution is uniform, add 1.5 grams of glacial acetic acid with a mass percent content of 60%, to obtain the demulsifier EXAM-1.

Embodiment 2

[0021] by C 20 ~C 24 The mixed alkenes and naphthalene are alkylated, and the product is sulfonated to obtain a sulfonic acid with an alkylaryl group. Get 16.1 grams (35 parts) of the above product and put it into a 100ml Erlenmeyer flask, add 24 grams (52 parts) of n-butanol, slowly add 5.6 grams (13 parts) of N, N'-bis(hexadecylmethyl) under stirring )-p-xylylenediamine, stirred evenly to obtain demulsifier EXAM-2.

Embodiment 3

[0023] by C 20 ~C 24 The mixed alkenes and naphthalene are alkylated, and the product is sulfonated to obtain a sulfonic acid with an alkylaryl group. Take 30 grams (15 parts) of the above product and put it into a 250ml Erlenmeyer flask, add 160 grams (80 parts) of methanol, and slowly add 10 grams (15 parts) of N, N'-bis(dodecylmethyl)- 2,3-dihydroxybutanediamine, stirred evenly to obtain demulsifier EXAM-3.

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Abstract

The present invention discloses one kind of demulsifier. The demulsifier contains salt formed with Gemini amine and alkyl aryl sulfonic acid and in the shown structure, and assistant. The Gemini amine is amphiphilic and hydrophobic-oleophobic, and the alkyl aryl sulfonic acid is amphiphilic. The stable demulsifier system has excellent demulsifying and preserving effect on emulsified raw oil, and may be used widely for demulsifying treatment in raw oil production and refining.

Description

technical field [0001] The present invention relates to a demulsifier. Background technique [0002] As we all know, the stability of W / O is due to the existence of an oil-water interface film, the liquid film prevents the droplets from coagulating, and the stability of the liquid film lies in the fact that the liquid film contains some polar components such as colloids, asphaltenes, and organic acids. Strengthen the strength of the oil-water interface film. Especially asphaltenes, whose aromatic rings contain heteroatoms, show amphiphilic properties, accumulate on the interface, and increase the difficulty of liquid film rupture and dehydration. [0003] The methods of demulsification generally include physical methods and chemical methods. Usually, in order to overcome the obstacles caused by the liquid film, the two methods should be combined. Usually physical methods include high voltage electric field demulsification, thermal demulsification, gravity and centrifugal s...

Claims

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Application Information

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IPC IPC(8): B01D17/05
Inventor 王金本曹华伍家忠樊明红王毅琳闫海科
Owner INST OF CHEM CHINESE ACAD OF SCI
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