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Polyamide-amine type de-emulsifier and demulsification dewatering method for O/W type crude-oil emulsion

A technology of polyamide and demulsifier, which is applied in the fields of polyamide-amine demulsifier and demulsification dehydration, which can solve the difficulty in the synthesis of polyamide-amine macromolecules, the unsatisfactory demulsification effect of polyamide-amine macromolecules, High production cost and other problems, to achieve the effect of easy industrialized large-scale production and application, improve the effect of demulsification and dehydration, and high degree of branching

Active Publication Date: 2016-01-27
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 polyamide-amine macromolecules 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 and the production cost is very high

Method used

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  • Polyamide-amine type de-emulsifier and demulsification dewatering method for O/W type crude-oil emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This example was used to prepare the demulsifiers of the present invention.

[0037] 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 to obtain.

Embodiment 2

[0039] This example was used to prepare the demulsifiers of the present invention.

[0040] 14.4 grams (5 mmol) of 1.5 generation polyamide-amine macromolecules (terminated as ester groups, purchased from Weihai Chenyuan Molecular New Materials Co., Ltd.) were dissolved in 25 milliliters of methanol, and added dropwise to 57.2 grams (40 milliliters) mol) of 1.0 generation polyamide-amine type macromolecules (terminals are amino groups, purchased from Weihai Chenyuan Molecular New Materials Co., Ltd.) in methanol solution (200 milliliters), heated to reflux under nitrogen protection for 6 hours, and removed the solvent under reduced pressure available.

Embodiment 3

[0042]This example was used to prepare the demulsifiers of the present invention.

[0043] Dissolve 12.0 g (2 mmol) of 2.5 generation polyamide-amine macromolecules (end group is ester group, purchased from Weihai Chenyuan Molecular New Material Co., Ltd.) in 20 ml of methanol, and add dropwise to 45.8 g (32 ml mol) of 1.0 generation polyamide-amine type macromolecules (the terminal group is amine group, purchased from Weihai Chenyuan Molecular New Materials Co., Ltd.) in 200 ml of methanol solution, heated to reflux for 12 hours under nitrogen protection, and removed the solvent under reduced pressure. get.

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Abstract

The invention discloses a polyamide-amine type de-emulsifier and a demulsification dewatering method for an O / W type crude-oil emulsion. The de-emulsifier is prepared by grafting a polyamidoamine molecule with an amine terminal group to a polyamide amine type molecule with an ester terminal group, wherein the molar ratio of the polyamide amine type molecule with the amine terminal group to the polyamide amine type molecule with the ester terminal group is 3-50:1, and the generation number (which is defined in the specification) of the polyamide amine type molecule with the amine terminal group to the polyamide amine type molecule with the ester terminal group is less than 3.0. The synthesized polyamide-amine type de-emulsifier possesses relatively excellent de-emulsification, and also the synthetic method is relatively simple.

Description

technical field [0001] The invention relates to a demulsifier, in particular to a polyamide-amine demulsifier suitable for O / W crude oil emulsions and a demulsification and dehydration method for O / W crude oil emulsions using the demulsifier. Background technique [0002] The demulsification and dehydration of crude oil emulsion is an important link in the process of oil exploitation, gathering and transportation, and refining. As most of my country's oilfields enter the middle and late stages, various oil production additives are used more frequently, resulting in more oil-water emulsion systems. Complicated, the difficulty of demulsification is greatly increased, and the commonly used polyether demulsifiers are not effective. [0003] Polyamide-amine dendrimers (PAMAM) are mainly prepared by the divergent method: ethylenediamine is used as the initiator nucleus, and the first step is reacted with methyl acrylate to form a tetrabasic ester through Michael addition reaction, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G83/00C10G33/04
Inventor 侯研博沈明欢李本高
Owner CHINA PETROLEUM & CHEM CORP