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Aqueous-phase demulsifier and preparation method thereof

A demulsifier and water-phase technology, which is applied in the field of water-phase demulsifier and its preparation, can solve the problems of increased difficulty in oil-water separation, limited types, and unsatisfactory performance, and achieves good interface participation ability, good viscosity reduction, and good performance. The effect of phase inversion demulsification

Active Publication Date: 2016-02-03
XINJIANG KELI NEW TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the promotion and implementation of tertiary oil recovery technology, the proportion of W / 0 / W type complex emulsion in the produced fluid is increasing, and the stability is becoming stronger and stronger, and the difficulty of oil-water separation is increasing. Most of the emulsions are conventional W / 0 type emulsion demulsifiers and 0 / W type (water phase) emulsion demulsifiers (referred to as water phase demulsifiers), the types are limited, and the performance is not ideal (especially demulsification at low temperature ability is very poor), therefore, the research and development of the stable and complex emulsion high-efficiency demulsifier of new chemical structure is imminent

Method used

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  • Aqueous-phase demulsifier and preparation method thereof
  • Aqueous-phase demulsifier and preparation method thereof
  • Aqueous-phase demulsifier and preparation method thereof

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Embodiment 1

[0023] Embodiment 1: the preparation method of long-chain alkyl 1.0G polyamide-amine: in (1000ml) there-necked flask, add 27g (0.1mol) octadecylamine, 300g methyl alcohol, constant temperature reflux under magnetic stirring, bath temperature 60 ℃, After the raw material is completely dissolved, slowly add 86 g (1 mol) of methyl acrylate dropwise with a constant pressure dropping funnel, the rate of addition is one drop per second, after 24 hours of reaction under constant temperature stirring, a light yellow transparent liquid is obtained, and the reaction solution is static for 12 hours, with a white precipitate Precipitate, filter, and distill the filtrate under reduced pressure with an oil pump to obtain a yellow liquid, which is the 0.5G product; add 4.3g (0.01mol) of the 0.5G product to a three-necked flask, add 100g of methanol, keep the temperature at 60°C, and slowly add ethyl alcohol dropwise under stirring. Diamine 36.1g (0.6mol), the rate of addition is one drop per ...

Embodiment 2

[0024] Embodiment 2: the preparation method of water-phase demulsifier A: 70g formula long-chain alkyl 1.0G polyamide, 30g long-chain alkylbenzenesulfonic acid and 100g methanol are mixed to obtain water-phase demulsifier A.

Embodiment 3

[0025] Embodiment 3: the preparation method of water phase demulsifier B: 70g long-chain alkyl 1.0G polyamide-amine, 30g long-chain alkylbenzene sulfonic acid and 100g methanol are mixed to obtain water phase demulsifier B.

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Abstract

The invention discloses an aqueous-phase demulsifier and a preparation method thereof. The aqueous-phase demulsifier comprises a solvent consisting of an optional combination of water, methanol, ethanol and dimethylbenzene at an optional mass ratio and a solute consisting of long-chain alkyl 1.0 G polyamide-imide and long-chain alkyl benzene sulfonic acid at optional mass ratio. The preparation method comprises the following step of uniformly mixing long-chain alkyl 1.0 G polyamide-imide, long-chain alkyl benzene sulfonic acid and the solvent. The aqueous-phase demulsifier has an excellent interface participation capability and viscosity reduction function, can quickly reach an oil-water surface to replace a natural surface active substance so as to form a novel unstable oil-water interface film, has favorable phase inversion and emulsion resolution properties to W / O / W type complicated emulsions, and can be applied to the fields of dehydration of water complicated emulsions or treatment of highly-oily sewage, and an innovative technique for preparing the aqueous-phase demulsifier is also provided.

Description

technical field [0001] The invention relates to an oilfield chemical agent capable of performing water-phase demulsification treatment on petroleum crude oil and a preparation method thereof, in particular to a water-phase demulsifier and a preparation method thereof. Background technique [0002] During the exploitation and processing of petroleum crude oil, due to its contact with water and the interaction with colloids, asphaltenes, naphthenic acids, fatty acids, salts, crystalline paraffins, and artificially introduced various chemical agents in the crude oil, etc. The emulsification phenomenon is very serious, and it is easy to form a stable W / 0 (water-in-oil) or 0 / W (oil-in-water) emulsion with water. At present, more than 80% of the crude oil produced in the world exists in the form of crude oil emulsion. With the continuous extraction of crude oil, some oilfields have entered the post-exploitation stage. The adoption of measures such as acidification, fracturing, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
Inventor 王良胜赵波魏新春樊玉新胡新玉连贵宾高青刘俊德夏强李学军于卫静
Owner XINJIANG KELI NEW TECH DEV
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