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Method for Separating Surface Active Components in Oil Samples

A technology for surface activity and oil separation, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of difficult separation of crude oil, separation of surface active substances without layers, etc., to promote diffusion, increase contact surface, and strengthen the effect effect of effect

Inactive Publication Date: 2015-10-28
QINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Part of the interface active substances can be separated, but for heavy oil, the emulsification of crude oil and the separation of oil and water are more difficult, and there is no layer for the separation of interface active substances, only a mixture of interface active substances can be obtained

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take a glass tube with an inner diameter of 0.2 cm and a height of 10 cm as the sample tube, add 0.2 mL of 0.2 wt % sodium hydroxide aqueous solution into it, and then drop a drop of crude oil (0.01 mL in volume) into the glass tube, It can move freely in the sample tube; then add an appropriate volume of sodium hydroxide aqueous solution with a concentration of 0.2wt% to the glass tube until the sodium hydroxide aqueous solution fills the entire glass tube, cover the stopper to ensure that there are no air bubbles in the glass tube, Then place it horizontally on the rotating drop interfacial tensiometer, make it rotate at a speed of 5000rpm along its horizontal axis for 30min, stop the rotation, take out the glass tube and place it vertically, the oil droplet floats to the surface of the solution, take out the oil droplet, and obtain separation the subsequent aqueous phase.

[0039] The concentration of the interface active component in the obtained water phase was mea...

Embodiment 2

[0041] Example 1 was repeated, except that the rotation time was changed to 10 min.

[0042] The concentration of the interface active component in the obtained aqueous phase was measured to be 80 ppm.

Embodiment 3

[0044] Example 1 was repeated except that the volume of crude oil put into the glass tube was doubled.

[0045] The concentration of the interface active component in the obtained aqueous phase was measured to be 375 ppm.

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PUM

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Abstract

The invention discloses a method for separating an interfacial active ingredient from an oil sample. Specifically, a mixture of the oil sample and alkali liquor rotates at a high speed in the presence of the alkali liquor, so that the interfacial active ingredient in the oil sample is diffused to an aqueous phase. Compared with the prior art, the method has the advantages that a sample tube with special height-diameter ratio or diameter-height ratio is adopted and the volume ratio of the oil sample to the alkali liquor is limited, so that the oil sample is drawn and diffused in a large enough space of the sample tube; under the action of low interfacial tension and centrifugal force, oil drops are significantly lengthened, so that the contact surface between the oil phase and the aqueous phase is greatly enlarged; under the influence of the interfacial tension, the interfacial active ingredient is enriched on the oil-water interface; on the other hand, the active ingredient is diffused to the aqueous phase due to the concentration difference between the aqueous phase and the interface, and diffusion of the interfacial active ingredient from the oil phase to the aqueous phase is further promoted in combination with the centrifugal force, so that the acting effect of the interfacial property is reinforced and the interfacial active ingredient can be separated from oil.

Description

technical field [0001] The invention relates to a method for separating surface active components in oil samples. Background technique [0002] At present, it is generally believed that the interface active components refer to the substances in crude oil that can react with alkali to produce higher interface activity, including acids and other polar substances. In production, it is usually necessary to separate these polar substances from the oil phase. [0003] At present, there are two main methods for the separation of interface active components in oil samples such as petroleum and its products: [0004] One is the solvent extraction method, which is mainly aimed at separating the acidic components in the crude oil, specifically using a mixed solvent (such as an alkali-alcohol solution) composed of an alkaline solution and an organic solvent to extract and separate the interface active components in the oil phase ( Such as the separation and analysis of active componen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D17/00
CPCB01D17/00
Inventor 张海燕
Owner QINZHOU UNIV