Preparation method of novel multi-branched cationic polyether reverse demulsifier and multi-branched cationic polyether reverse demulsifier

An inverse demulsifier and cationic polymerization technology, applied in the direction of chemical dehydration/demulsification, etc., can solve problems such as difficulty in meeting the production needs of efficient and rapid demulsification in oil fields, unclear use effect, and slow dehydration speed. Achieve superior demulsification performance, reduced surface tension and high molecular weight

Inactive Publication Date: 2020-07-17
JINHU JINLING NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the above two patents, the dehydration efficiency and the dehydration effect of crude oil with complex components have not been evaluated, and the specific application effect is not clear
[0003] In addition, with the enhancement of the stability of crude oil production fluid, a large number of traditional polyether demulsifiers that are more mature and widely used in China have been difficult to meet the requirements of efficient and rapid demulsification in oil fields due to low dehydration rate and slow dehydration speed. Production needs

Method used

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  • Preparation method of novel multi-branched cationic polyether reverse demulsifier and multi-branched cationic polyether reverse demulsifier
  • Preparation method of novel multi-branched cationic polyether reverse demulsifier and multi-branched cationic polyether reverse demulsifier
  • Preparation method of novel multi-branched cationic polyether reverse demulsifier and multi-branched cationic polyether reverse demulsifier

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Embodiment 1

[0026] The invention discloses a preparation method of a novel multi-branched cationic polyether inverse demulsifier, comprising the following steps:

[0027] (1) Reflux reaction of bisphenol A, diethylenetriamine and formaldehyde in a certain molar ratio under the action of alkali catalyst for 1 hour, the molar ratio of bisphenol A, diethylenetriamine, alkali catalyst and formaldehyde is 1:8 :1:20.

[0028] (2) Add the branched polyamine compound and alkali catalyst obtained in the step (1) into the high pressure cap, heat up and vacuumize after sealing. The molar ratio of branched polyamine compound to base catalyst is 1:1, and the temperature is 120 °C.

[0029] (3) Slowly and continuously add PO and EO into the high-pressure cap according to a certain proportion, and continue to react for 2 hours after the addition, and obtain hyperbranched polyether compounds after distillation. The mole fraction ratio of PO and EO is 1:1, the reaction cover pressure is 0.3 MPa, and the...

Embodiment 2

[0032] The invention discloses a preparation method of a novel multi-branched cationic polyether inverse demulsifier, comprising the following steps:

[0033] (1) Reflux reaction of bisphenol A, diethylenetriamine and formaldehyde in a certain molar ratio under the action of an alkali catalyst for 5 hours, the molar ratio of bisphenol A, diethylenetriamine, alkali catalyst and formaldehyde is 1:8 :1:20.

[0034] (2) Add the branched polyamine compound and alkali catalyst obtained in the step (1) into the high pressure cap, heat up and vacuumize after sealing. The molar ratio of branched polyamine compound to base catalyst is 1:1, and the temperature is 120 °C.

[0035] (3) Slowly and continuously add PO and EO into the high-pressure cap according to a certain proportion, and continue to react for 4 hours after the addition, and obtain hyperbranched polyether compounds after distillation. The mole fraction ratio of PO and EO is 1:2, the reaction cover pressure is 0.3 MPa, and...

Embodiment 3

[0038] The invention discloses a preparation method of a novel multi-branched cationic polyether inverse demulsifier, comprising the following steps:

[0039] (1) Reflux reaction of bisphenol A, diethylenetriamine and formaldehyde in a certain molar ratio under the action of alkali catalyst for 6h, the molar ratio of bisphenol A, diethylenetriamine, alkali catalyst and formaldehyde is 1:8 :1:20.

[0040] (2) Add the branched polyamine compound and alkali catalyst obtained in the step (1) into the high pressure cap, heat up and vacuumize after sealing. The molar ratio of branched polyamine compound to base catalyst is 1:1, and the temperature is 120 °C.

[0041] (3) Slowly and continuously add PO and EO into the high-pressure cap according to a certain proportion, and continue to react for 5 hours after the addition, and obtain hyperbranched polyether compounds after distillation. The mole fraction ratio of PO and EO is 2:3, the reaction cover pressure is 0.3 MPa, and the react...

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Abstract

The invention discloses a preparation method of a multi-branched cationic polyether reverse demulsifier. Bisphenol A is used as a block polyether initiator, phenolic hydroxyl ortho-hydrogen, formaldehyde and vinylamine undergo an amine methylation reaction to generate a polyamine compound with bisphenol A serving as a core, vinylamine serving as a branch and a phenolic hydroxyl group as a leaf, the polyamine compound and epoxy compounds such as epoxypropane and ethylene oxide undergo a ring opening polymerization reaction to produce a multi-branched polyether, and further the tail end of the multi-branched polyether is subjected to modification with different cationization degrees to obtain the multi-branched cationic polyether reverse demulsifier. The prepared multi-branched cationic polyether reverse demulsifier is higher in deoiling rate and demulsifying efficiency and better in demulsifying capacity, and can well make up for the functional defects of a traditional demulsifier, theoil exploitation cost can be effectively reduced, energy is saved, emission is reduced, and development of an oil exploitation process is facilitated.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a novel multi-branched cationic polyether reverse demulsifier and the thus prepared multi-branched cationic polyether reverse demulsifier. Background technique [0002] With the continuous development and wide application of petroleum industry, especially tertiary oil recovery technology, the composition of crude oil production fluid becomes more and more complex, and the water content is higher and higher. This not only increases the difficulty of oil-water separation, but also increases the burden on equipment such as pumps, pipelines and storage tanks during transportation and refining; therefore, demulsification and dehydration must be carried out before oil transportation and refining. There are many methods of demulsification, among which adding a small amount of chemical agent or demulsifier is the fastest and most commonly use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 张进凌坤华侯琳熙范阳海阮任杰凌功明
Owner JINHU JINLING NEW MATERIAL SCI & TECH
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