Polyether de-emulsifier and W/O-type crude oil emulsion demulsification dehydration method using the same

A polyether demulsifier and demulsifier technology are applied in the fields of demulsification and dehydration and polyether demulsifier, which can solve the difficulty of synthesizing polyamide-amine type macromolecules, limit the synthesis and application of hyperbranched polyether, and polyether demulsification. The problem of unsatisfactory effect, etc., achieves good demulsification performance, is easy to industrialize large-scale production and application, and avoids the effect of lengthy synthesis process.

Active Publication Date: 2016-02-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem in the prior art is that the demulsification effect of polyether modified with polyamide-amine macromolecules of less than 3.0 generations is not ideal, and the synthesis of highly branched polyamide-amine macromolecules of more than 3.0 generations is very difficult. Difficulty and high production cost limit the synthesis and application of this highly branched polyether

Method used

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  • Polyether de-emulsifier and W/O-type crude oil emulsion demulsification dehydration method using the same

Examples

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Effect test

Embodiment 1

[0046] This example was used to prepare the demulsifiers of the present invention.

[0047] (1) 7.0 grams (2.5 mmol) of 1.5 generation polyamide-amine macromolecules (terminated as ester groups, purchased from Weihai Chenyuan Molecular New Materials Co., Ltd., 1.5 generation PAMAM-COOCH 3 ) was dissolved in 10 milliliters of methanol, and was added dropwise to 20.7 grams (40 mmol) of 0-generation polyamide-amine macromolecules (terminal groups were amino groups, purchased from Weihai Chenyuan Molecular New Materials Co., Ltd., 0-generation PAMAM-NH 2 ) in 200 ml of methanol solution, heated to reflux for 4 hours under nitrogen protection, and removed the solvent under reduced pressure.

[0048] (2) Add 2g of the product of step (1) and 1g of catalyst KOH into the autoclave, fully purge the pipeline and the reactor with nitrogen for 3 times, stir and slowly add 114g of propylene oxide dropwise when the temperature is raised to 120°C, Control the temperature at 120°C-150°C and ...

Embodiment 2

[0050] This example was used to prepare the demulsifiers of the present invention.

[0051] (1) Dissolve 14.4 g (5 mmol) of 1.5 generation polyamide-amine type macromolecule (end group is ester group, purchased from Weihai Chenyuan Molecular New Material Co., Ltd.) in 25 ml of methanol, and add dropwise to 57.2 g (40 millimoles) in the methanol solution (200 milliliters) of 1.0 generation polyamide-amine type macromolecules (terminated as amine group, purchased from Weihai Chenyuan Molecular New Material Co., Ltd.), heated and refluxed under nitrogen protection for 6 hours, reduced The solvent was removed under pressure.

[0052] (2) Add 2g of the product of step (1) and 1g of catalyst NaOH into the autoclave, fully purge the pipeline and the reactor with nitrogen for 3 times, stir and slowly add 145g of propylene oxide dropwise when the temperature is raised to 120°C, Control the temperature at 120°C-150°C and the pressure of 0.1MPa-0.4MPa until the reaction is complete, add...

Embodiment 3

[0054] This example was used to prepare the demulsifiers of the present invention.

[0055] (1) 14.4 grams (5 mmol) of 1.5 generation polyamide-amine type macromolecules (end groups are ester groups, purchased from Weihai Chenyuan Molecular New Materials Co., Ltd., dissolved in 25 milliliters of methanol, added dropwise to 57.2 grams (40 mmol) 1.0 generation polyamide-amine type macromolecule (terminal is amine group, purchased from Weihai Chenyuan Molecular New Material Co., Ltd.), in 200 ml of methanol solution, heated to reflux for 6 hours under nitrogen protection, and decompressed Solvent was removed.

[0056] (2) Add 10g of the product of step (1) and 1g of catalyst sodium ethoxide into the autoclave, fully purge the pipeline and the autoclave with nitrogen for 3 times, stir and slowly add 168g of propylene oxide dropwise when the temperature is raised to 120°C , control the temperature at 120°C-150°C, and the pressure at 0.1MPa-0.4MPa until the reaction is complete, ad...

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Abstract

The invention discloses a polyether de-emulsifier and a W/O-type crude oil emulsion demulsification dehydration method using the same. A preparation method of the polyether de-emulsifier comprises that 1, an amino group-terminated polyamide-amine type molecule is grafted to an ester group-terminated polyamide-amine type molecule, wherein a mole ratio of the amino group-terminated polyamide-amine type molecule to the ester group-terminated polyamide-amine type molecule is 3-50: 1 and the amino group-terminated polyamide-amine type molecule and the ester group-terminated polyamide-amine type molecule belong to generation of less than 3.0, and 2, the product obtained by the step 1 and an epoxy compound undergo a reaction. The preparation method of the polyether de-emulsifier has simple synthesis processes and can be easily industrialized. The polyether de-emulsifier has a high branch structure. The test result in the embodiment shows that the polyether de-emulsifier has excellent demulsification effects.

Description

technical field [0001] The invention relates to a demulsifier, in particular to a polyether demulsifier suitable for W / O crude oil emulsion and a method for demulsifying and dehydrating the W / O crude oil emulsion using the demulsifier. Background technique [0002] Heavy and inferior crude oil is the trend of crude oil production in the world. According to statistics, heavy oil and super heavy oil account for more than 20% of the world's proven crude oil reserves, and the exploitation of heavy oil has increasingly attracted the attention of various countries. Heavy oil contains high content of colloid and asphaltenes, high viscosity and poor fluidity, so it is very difficult to exploit and gather and transport, among which the problem of demulsification and dehydration of heavy oil is particularly critical. At present, the types of demulsifiers commonly used for heavy oil are limited, and most of them are compound products. Most demulsifiers can no longer meet the dehydratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26C08G81/00C08G83/00C10G33/04
Inventor 沈明欢侯研博于丽谭丽王振宇李本高
Owner CHINA PETROLEUM & CHEM CORP
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