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Quaternized polyether reverse demulsifier and preparation method thereof

A technology of inverse demulsifier and quaternized polyether, which is applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of high cost, easy stratification, long reaction time, etc., and achieve the effect of low cost

Pending Publication Date: 2021-09-28
中海油(天津)油田化工有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The other is a synthetic method, one of which is to first modify the clear water polyether with maleic anhydride or acrylic acid, and then carry out a copolymerization reaction with cationic macromolecules. However, although this method has certain advisability, However, the stability of the resulting medicament is poor, and it is easy to stratify, so it is not suitable for long-term storage
And the reaction time is longer, the reaction process is complicated, the cost is higher, and the industrial application is also less

Method used

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  • Quaternized polyether reverse demulsifier and preparation method thereof
  • Quaternized polyether reverse demulsifier and preparation method thereof

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Embodiment

[0034] First, take 81.8g of polyether and 2.5g of epichlorohydrin, add them to a four-neck flask, mix well, and heat up to 60°C; at this time, weigh 4.84g of 33% trimethylamine solution and 10g of distilled water, and mix the two Then add it into the buret, start dropwise at 60°C, after the dropwise addition time is 1h, heat up to 75°C, react for 3h; cool to 40°C, add 70g of 75% ethanol solution to obtain a quaternary solution with a solid content of 50%. Ammonized polyether inverse demulsifier a.

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Abstract

The invention discloses a quaternized polyether reverse demulsifier and a preparation method thereof. The water cleaning effect of the quaternized polyether reverse demulsifier is superior to that of the same type of water cleaning polyether. The advantages of good compatibility effect with the demulsifier, high demulsification speed, good water cleaning effect and the like are achieved. Moreover, on the basis, the reaction process is optimized, the reaction steps are simplified, and the cation-containing polyether reverse demulsifier is synthesized by adopting a one-step method, so that the product has higher universality, and the economic benefit of the product can be improved.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and specifically relates to a quaternized polyether reverse phase demulsifier and a preparation method thereof. Background technique [0002] In recent years, in order to increase crude oil production, polymer flooding has been widely used in Bohai oilfields. The stability of crude oil production fluid is getting higher and higher, and it is relatively difficult to break the emulsion. Therefore, the oil content in the demulsification water is increasing. The use of clear water-type polyether inverse demulsifiers alone and in conjunction with demulsifiers is not ideal for some oil fields with complex production fluids. For this type of oil field, if only cationic inverse demulsifiers are used together with demulsifiers, it is easy to cause polymer precipitation, which will cause a certain burden on the on-site process treatment. Through a large number of experiments, we found that ...

Claims

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Application Information

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IPC IPC(8): C08G65/333C10G33/04
CPCC08G65/33306C10G33/04
Inventor 寇子敏李军李支文杨记涛程艳魏强唐熙明
Owner 中海油(天津)油田化工有限公司
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