A kind of demulsifier and preparation method of high polymer-containing heavy oil sewage demulsifier

A technology of water demulsifier and oil pollution, which is applied in the field of demulsifier and preparation of heavy oily sewage with high polymer content, and can solve the problems of low degreasing rate of heavy oily sewage with high poly content

Active Publication Date: 2020-05-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of demulsifier for high polymer-containing heavy oil sewage in order to overcome the defect of the existing heavy oil sewage demulsifier to the low degreasing rate of high-poly-contained heavy-oil sewage

Method used

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  • A kind of demulsifier and preparation method of high polymer-containing heavy oil sewage demulsifier
  • A kind of demulsifier and preparation method of high polymer-containing heavy oil sewage demulsifier
  • A kind of demulsifier and preparation method of high polymer-containing heavy oil sewage demulsifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 10g of methanol, 6g of polyetheramine, 1.6g of higher alcohol and 1.5g of (R)-3-chlorophenyloxirane into a reactor with a stirrer, stir well, then add 0.01g of titanocene dichloride , stirred and reacted at 80°C and 0.5MPa for 1h, then added 1g of sodium bisulfite, adjusted the temperature to 70°C, and the pressure was 0.1MPa, stirred and reacted for 0.5h, and then lowered to normal temperature and pressure to obtain high-polyhesy oily sewage broken Emulsion, its chemical reaction structural formula is as follows:

[0032]

Embodiment 2

[0034] Add 20g of ethanol, 8g of polyetheramine, 2g of higher alcohol and 2g of 3-bromophenyloxirane into a reactor with a stirrer. After stirring evenly, add 0.05g of zirconocene dichloride. Stir and react for 4 hours under the same conditions, then add 1.5g of sodium sulfite, adjust the temperature to 90°C, pressure 0.3MPa, stir and react for 3 hours, and then lower to normal temperature and pressure to obtain a demulsifier for sewage with high polymer content. Its chemical reaction structure is as follows:

[0035]

[0036] Embodiment 3~8 steps are identical with embodiment 1 or 2, and each composition and test condition are as shown in table 1:

[0037] Table 1 Embodiment 3~8 formula composition and polymerization condition (unit: g)

[0038]

[0039]

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Abstract

The invention relates to a demulsifier for sewage high in thickened oil content and a preparation method and belongs to the technical field of chemical agents for oil fields and preparation. The structural formula of the demulsifier for sewage high in thickened oil content is shown in the claim 1, wherein R1 is one of -H, -CH3 and -CH2CH3, m is 5-7, and n is 6-15. The molecular weight of the polymer is 300,000-600,000. Based on the analysis on a demulsification mechanism, the main chain structure of the polymer of the demulsifier is designed on the aspects of a molecular structure, a function effect and the synergistic effect of groups at an equal angle according to the characteristics of the sewage high in thickened oil content, the synergistic effect of amino, sulpho and ether groups in the structural formula of the polymer demulsifier make the thickened oil sewage high in polymer content efficiently demulsified, the oil removal rate of the sewage high in thickened oil content is 95% or above in field application, and the suspended solidremoval rate is 90% or above.

Description

technical field [0001] The invention relates to a demulsifier for highly polymerized heavy oil sewage and a preparation method thereof, belonging to the technical field of chemical agents and preparations for oilfields. Background technique [0002] In the process of developing heavy oil blocks by thermal recovery methods such as burning oil layers, it is generally necessary to add catalysts, viscosity reducers, synergists or other surfactants, which makes the oil-water emulsification characteristics of the produced fluid more and more complicated. There have also been major changes. After the produced fluid is treated by demulsification, oil removal and other processes, the separated sewage generally has a high oil content and is black and turbid. The sewage contains high polymer content, and the upper part is easy to emulsify. Generally, it is treated by adding a demulsifier. Commonly used demulsifiers for heavy oily sewage, such as epichlorohydrin-dimethylamine series po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/331C08G65/334C02F1/40C02F103/10
CPCC02F1/40C02F2103/10C08G65/3312C08G65/3315C08G65/3346
Inventor 陈洪杰朱德智黄雪松杜彦敏伍丹丹汪沈阳常丽芳李天俊
Owner CHINA PETROLEUM & CHEM CORP
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