Cross-linked polyether reverse demulsifier and preparation method thereof

A reversed-phase demulsifier and cross-linking polymerization technology, applied in separation methods, chemical dehydration/demulsification, mining wastewater treatment, etc., can solve the problems of sludge clogging water treatment facilities, slow dispersion rate, and insignificant effect. To achieve the effect of good water quality and fast water purification rate

Active Publication Date: 2021-02-02
中海油(天津)油田化工有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for oilfields with high water content of produced fluid, short residence time, and small oil-water density difference, there are still great difficulties in the treatment of produced fluid: conventional inverse demulsifiers are either slow in dispersion rate so that the effect is not obvious, or When used in conjunction with demulsifiers, it will affect the efficiency of demulsifiers; or it is easy to generate sludge to block downstream water treatment facilities (such as hydrocyclones)

Method used

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  • Cross-linked polyether reverse demulsifier and preparation method thereof
  • Cross-linked polyether reverse demulsifier and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Add 20g of 2-pyridinemethanol and 3.0g of ring-opening polymerization catalyst potassium hydroxide into the high-temperature and high-pressure reactor, heat up to 90°C, vacuum dehydrate for 30min, continue to heat up to 115-125°C, and gradually introduce 980g of propylene oxide , and control the reaction temperature at 120-140°C and the pressure below 0.4MPa. After the reaction in the kettle reaches negative pressure, keep the reaction at 130°C for 1 hour to obtain polyoxypropylene ether oil head (P1).

[0033] (2) Take 50 g of the polyoxypropylene ether oil head (P1) synthesized in step (1) and place it in a high-temperature and high-pressure reactor, put in 1.95 g of ring-opening polymerization catalyst potassium hydroxide, heat up to 90 ° C, vacuum dehydrate for 30 min, and continue Raise the temperature to 115-125°C, gradually feed 300g of ethylene oxide, and control the reaction temperature to 110-130°C, and the pressure to be lower than 0.4MPa. Oxypropane, con...

Embodiment 2

[0036] (1) Add 20g of 2-pyridineethanol and 3.0g of ring-opening polymerization catalyst sodium hydroxide into a high-temperature and high-pressure reactor, heat up to 90°C, vacuum dehydrate for 30min, continue to heat up to 115-125°C, and gradually introduce 980g of propylene oxide , and control the reaction temperature at 120-140°C and the pressure below 0.4MPa. After the reaction in the kettle reaches negative pressure, keep the reaction at 130°C for 1 hour to obtain polyoxypropylene ether oil head (P2).

[0037] (2) Take 50 g of the polyoxypropylene ether oil head (P2) synthesized in step (1) and place it in a high-temperature and high-pressure reactor, put in 2.1 g of ring-opening polymerization catalyst sodium hydroxide, heat up to 90 ° C, vacuum dehydrate for 30 min, and continue Raise the temperature to 115-125°C, gradually feed 300g of ethylene oxide, and control the reaction temperature to 110-130°C, and the pressure to be lower than 0.4MPa. Propylene oxide, control ...

Embodiment 3

[0040] (1) Add 20g of 4-pyridinepropanol and 3.0g of ring-opening polymerization catalyst barium hydroxide into the high-temperature and high-pressure reactor, heat up to 90°C, vacuum dehydrate for 30min, continue to heat up to 115-125°C, and gradually introduce 980g of epoxy Propane, and control the reaction temperature at 120-140°C and the pressure below 0.4MPa. After the reaction in the kettle reaches negative pressure, keep the reaction at 130°C for 1 hour to obtain polyoxypropylene ether oil head (P3).

[0041] (2) Take 50 g of the polyoxypropylene ether oil head (P3) synthesized in step (1) and place it in a high-temperature and high-pressure reactor, put in 2.1 g of ring-opening polymerization catalyst barium hydroxide, heat up to 90° C., vacuum dehydrate for 30 minutes, and continue Raise the temperature to 115-125°C, gradually feed 300g of ethylene oxide, and control the reaction temperature to 110-130°C, and the pressure to be lower than 0.4MPa. Propylene oxide, cont...

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Abstract

The invention discloses a cross-linked polyether reverse demulsifier and a preparation method thereof. The preparation method comprises the following step of: by taking polypropylene oxide-polyethylene oxide-polypropylene oxide triblock polyether taking pyridinol as an initiator and epoxy chloropropane as raw materials, reacting under the action of a basic catalyst to obtain the water-soluble cross-linked polyether reverse demulsifier. The water-soluble cross-linked polyether reverse demulsifier can be used for treating high-water-content crude oil produced liquid, and has the characteristicsof high water purification speed and clear dehydrated water.

Description

technical field [0001] The invention belongs to the technical field of petroleum processing, and relates to a reverse-phase demulsifier for separating high-water crude oil production fluid and a preparation method thereof, in particular to a water-soluble cross-linked polyether reverse-phase demulsifier and a preparation method thereof. Background technique [0002] At present, most oilfields in my country have entered the middle and late stage of development and production, the trend of heavy crude oil is prominent, the water content of the produced fluid increases sharply, and the proportion of oil-in-water (O / W) emulsion is increasing, O The degree of emulsification of / W emulsion is more serious, the material composition in the oil-water interface is more complex, and the difficulty of oil-water separation is further increased. The traditional treatment strategy of demulsifier + water clearing agent has been difficult to meet the production needs of oilfields, especially o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08J3/24C10G33/04C02F1/40C02F103/10C08L71/02
CPCC08G65/263C08J3/24C10G33/04C02F1/40C02F2103/10C08J2371/02
Inventor 魏强代红成杜大委郭海军李军
Owner 中海油(天津)油田化工有限公司
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