Surface active agent and oil-soluble viscosity reducer for crude oil as well as preparation method of surface active agent

A technology of surfactants and heavy oil viscosity reducers, which is applied in the direction of sulfonate preparation, chemical instruments and methods, and drilling compositions, etc. It can solve complex synthesis processes, limited viscosity reduction effects, poor temperature resistance, etc. problem, to achieve the effect of less dosage, improved viscosity reduction ability and low cost

Inactive Publication Date: 2013-12-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, polymer surfactants generally have high raw material costs, complex synthesis processes, limited viscosity-reducing effects, and poor universality. Among them, non-ionic surfactants have poor temperature resistance, and some (such as alkylphenol polyoxyethylene ether) Harmful to the environment

Method used

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  • Surface active agent and oil-soluble viscosity reducer for crude oil as well as preparation method of surface active agent
  • Surface active agent and oil-soluble viscosity reducer for crude oil as well as preparation method of surface active agent
  • Surface active agent and oil-soluble viscosity reducer for crude oil as well as preparation method of surface active agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mix 284g stearic acid (1mol) and 97.9g dimethylaminoethanol (1.1mol) evenly, add 0.3g concentrated sulfuric acid and toluene as a water-carrying agent, react at 150-180°C for 6 hours, until no water comes out, remove under reduced pressure Toluene and excess dimethylaminoethanol gave 2-(dimethylamino)ethyl stearate (n=16) 355g.

[0029] Dissolve 12.8g of propanesultone (0.105mol) in 30ml (24g) of acetone, add it into a 500ml three-necked flask equipped with a condenser, dropping funnel and electric stirring, then stir in a water bath at 10°C at constant temperature, and weigh 35.5 Dissolve g of 2-(dimethylamino)ethyl stearate (0.1mol) in 100ml (80g) of acetone and slowly drop it into a three-necked flask through a dropping funnel. After dropping, raise the temperature to 35°C for 24 hours. Then, it was filtered with a Buchner funnel to obtain 43.8 g of ethyl stearate ethyl sulfobetaine (n=16) as a white solid. Its infrared spectrum is as figure 1 shown.

[0030] fig...

Embodiment 2

[0032] Mix 284kg stearic acid (1000mol) and 97.9kg dimethylaminoethanol (1100mol) evenly, add 0.1kg concentrated sulfuric acid and toluene as water-carrying agent, react at 150-180°C for 6 hours until no water is separated out, remove toluene under reduced pressure and excess dimethylaminoethanol to obtain 2-(dimethylamino)ethyl stearate (n=16) 355kg.

[0033] Take 128kg propane sultone (1050mol) and dissolve it in 250 L (200kg) acetone, add 2m 3 In the reactor, then cooled to 10°C, under constant temperature stirring, 355kg of 2-(dimethylamino)ethyl stearate (1000mol) dissolved in 800 L (640kg) of acetone was slowly added to the reactor, adding After completion, the temperature was raised to 35° C. for 24 hours. Then, acetone was filtered off to obtain 461 kg of white solid stearate ethyl sulfobetaine (n=16).

Embodiment 3

[0035] Mix 256g of palmitic acid (1mol) and 97.9g of dimethylaminoethanol (1.1mol) evenly, add 0.3g of concentrated sulfuric acid and toluene as a water-carrying agent, and react at 150-180°C for 6 hours until no water comes out, then remove toluene under reduced pressure and excess dimethylaminoethanol to obtain 327g of palmitic acid-2-(dimethylamino)ethyl ester (n=14).

[0036]Dissolve 12.8g of propanesultone (0.105mol) in 30ml (24g) of acetone, add it into a 500ml three-neck flask equipped with a condenser, dropping funnel and electric stirring, then stir in a water bath at 10°C at constant temperature, and weigh 32.7 Dissolve g of 2-(dimethylamino)ethyl palmitate (0.1mol) in 80ml (64g) of acetone and slowly drop it into the three-necked flask through the dropping funnel. After the drop, raise the temperature to 35°C for 24 hours. Then, it was filtered with a Buchner funnel to obtain 40.3 g of ethyl stearate ethyl sulfobetaine (n=14) as a white solid.

[0037] Among them, ...

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Abstract

The invention provides a surface active agent and an oil-soluble viscosity reducer for crude oil as well as a preparation method of the surface active agent. The surface active agent is fatty acid ester ethyl sulphobetaine; and the oil-soluble viscosity reducer for crude oil comprises the following components in percentage by mass: (1) 40%-70% of mixed aromatics solvent, (2) 20%-55% of mutual solvent and (3) 2%-10% of surface active agent. The oil-soluble viscosity reducer for crude oil has the advantages that the fatty acid ester ethyl sulphobetaine type surface active agent obtained by the reaction of propane sultone and long-chain fatty acid-2-(dimethylamino) ethyl ester is firstly adopted in the oil-soluble viscosity reducer for the crude oil, the viscosity reducing effect is obvious, the using amount of the oil-soluble viscosity reducer does not exceed 5%, and the viscosity reduction rate of the oil-soluble viscosity reducer is above 90%.

Description

[0001] technical field [0002] The invention belongs to the technical field of viscosity reducer for viscous crude oil, and in particular relates to a surfactant, an oil-soluble viscosity reducer for heavy oil and a preparation method. Background technique [0003] Heavy oil resources are abundant in the world, and its geological reserves exceed conventional crude oil. With the rapid development of society, the demand for energy is increasing day by day, and the exploitation of heavy oil resources is of great significance to alleviate the energy crisis. However, due to the high viscosity and poor rheological properties of heavy oil, conventional crude oil recovery methods are not suitable for heavy oil recovery. The key to heavy oil recovery is to reduce the viscosity of heavy oil and improve the rheological properties of heavy oil. Viscosity reduction methods commonly used in heavy oil mainly include: heating viscosity reduction method, thin oil viscosity reduction metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C07C309/14C07C303/32
Inventor 张晓云于世虎安长华吴伟
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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