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De-emulsifier and demulsification method for hydrocarbon oil

A demulsifier and hydrocarbon oil technology, applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of hindering the merger of water droplets, reducing the residence time of discharged water, and large electric current in the electrical desalination system, so as to promote separation and coalescence, and improve the Synergistic effect, the effect of improving drainage quality

Active Publication Date: 2014-07-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main hazard of solid particles in crude oil is to form a very stable oil-water intermediate emulsification layer together with other emulsifiers in crude oil. This interface layer has a great impact on the operation of production equipment, mainly in two aspects: (1) due to the interface layer The upper colloid or particles are charged, and under the action of the electric field, they move directionally between the upper and lower plates to form a current. When the middle interface layer reaches a certain thickness, the metal content will also accumulate in the middle layer, and the electric field current will become higher and higher, making the normal The current of the electric desalination system of the decompression device is too large, and the dehydration is difficult, resulting in excessive water content in the crude oil after dehydration. In severe cases, the oil-water interface is unclear, the electrode discharges, and frequent trips occur. The direct result is that the desalination equipment cannot work normally; (2) This kind of A very thick interface layer will not only hinder the merging of water droplets, but also reduce the residence time of the discharged water. The interface layer and the oil in the water will be discharged along with the electric desalination device, causing the drainage oil to seriously exceed the standard, resulting in large processing losses and damage to the downstream sewage treatment system. strong impact

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  • De-emulsifier and demulsification method for hydrocarbon oil
  • De-emulsifier and demulsification method for hydrocarbon oil
  • De-emulsifier and demulsification method for hydrocarbon oil

Examples

Experimental program
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Effect test

Embodiment 1

[0043] This example is used to illustrate the demulsifier and hydrocarbon oil demulsification method according to the present invention.

[0044] (1) The preparation method of the demulsifier in the present embodiment is:

[0045] Put the polyoxyethylene-type nonionic surfactant in a beaker, and heat it to melt at 60°C, add methanol to the reaction kettle equipped with a stirring device, and then add the above-mentioned heated to melt polyoxyethylene-type nonionic surfactant Surfactant, and stir evenly, then add acetic acid, stir evenly, thus obtain the demulsifier according to the present invention. The composition of the obtained demulsifier is:

[0046] (a) The polyoxyethylene type nonionic surfactant is an oxyethylene-propylene oxide block copolymer with tetraethylenepentamine as a starter and a polyoxyethylene-polyoxypropylene block with a phenolic resin as a starter A mixture of copolymers, ethylene oxide-propylene oxide block copolymer with tetraethylenepentamine as t...

Embodiment 2

[0052] This example is used to illustrate the demulsifier and hydrocarbon oil demulsification method according to the present invention.

[0053] The crude oil is mixed with the demulsifier in the same manner as in Example 1, and the mixed product is divided into an oil phase and an aqueous phase under an electric field, and the difference is:

[0054] In step (1), the composition of demulsifier is as follows:

[0055] (a) The polyoxyethylene type nonionic surfactant is ethylene oxide-propylene oxide block copolymer with phenolic resin as the initiator, manufacturer: Shandong Binzhou Chemical Factory, brand: BS131, number average molecular weight is 13000, with Based on the total amount of oxyethylene-propylene oxide block copolymer, the content of oxyethylene structural units is 40% by weight, and the content of oxypropylene structural units is 60% by weight;

[0056] (b) formic acid;

[0057] (c) ethanol;

[0058] Wherein, the content of polyoxyethylene type nonionic surf...

Embodiment 3

[0061] This example is used to illustrate the demulsifier and hydrocarbon oil demulsification method according to the present invention.

[0062] The crude oil is mixed with the demulsifier in the same manner as in Example 1, and the mixed product is divided into an oil phase and an aqueous phase under an electric field, and the difference is:

[0063] In step (1), the composition of demulsifier is as follows:

[0064] (a) The polyoxyethylene type nonionic surfactant is ethylene oxide-propylene oxide block copolymer with polyamine as the initiator, manufacturer: Shandong Binzhou Chemical Factory, brand: BS2640, number average molecular weight is 15000, with Based on the total amount of oxyethylene-propylene oxide block copolymer, the content of oxyethylene structural units is 35% by weight, and the content of oxypropylene structural units is 65% by weight;

[0065] (b) citric acid;

[0066] (c) n-butanol;

[0067]Wherein, based on the total amount of hydrocarbon oil, the co...

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Abstract

The invention provides a de-emulsifier which comprises a polyoxyethylene nonionic surfactant, acid and fatty alcohol with a carbon atom number of 1 to 10. The invention also provides a demulsification method which comprises the following steps: mixing hydrocarbon oil and a de-emulsifier with water and allowing an obtained mixture to be separated into an oil phase and a water phase under the action of an electric field, wherein, the de-emulsifier used in the method is the de-emulsifier provided in the invention. By using the de-emulsifier and the demulsification method for hydrocarbon oil provided in the invention, an oil-water intermediate emulsification layer in hydrocarbon oil which has a high content of solid particles can be effectively eliminated, thereby avoiding too great current in the process of electric dehydration. In addition, the de-emulsifier has simple composition and is easy to popularize and apply.

Description

technical field [0001] The invention relates to a demulsifier and a hydrocarbon oil demulsification method. Background technique [0002] Crude oil emulsion is a very complex dispersion system, and its stability is influenced by many factors, among which solid particles play an extremely important role in predicting and improving the stability of the emulsion. Fine insoluble solid particles constitute an important class of emulsifiers, so a higher solid content will increase the stability of the emulsion, and this increase is not linearly related to the solid content, but exponentially. Therefore, it is particularly important to study the stability of crude oil emulsion and develop new demulsifiers based on the factors affecting the stability of crude oil. [0003] The main hazard of solid particles in crude oil is to form a very stable oil-water intermediate emulsification layer together with other emulsifiers in crude oil. This interface layer has a great impact on the op...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/04
Inventor 于丽楚喜丽沈明欢王振宇谭丽
Owner CHINA PETROLEUM & CHEM CORP
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