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Fluorine-contd. linkage polyether demulsification agent and its prepn. method

A cross-linked polyether demulsifier and demulsifier technology, applied in the dehydration/demulsification of hydrocarbon oil, petroleum industry, etc., can solve the problem of processing load reduction, achieve the effect of fast dehydration speed, low dehydration temperature and less dosage

Inactive Publication Date: 2006-09-13
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the crude oil processing load of the combined station has decreased. In order to save energy, the original thermochemical / electrochemical two-stage dehydration process will be changed to a one-stage thermochemical dehydration process, which requires efficient crude oil demulsifiers to replace the existing conventional dehydration process. emulsion

Method used

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  • Fluorine-contd. linkage polyether demulsification agent and its prepn. method
  • Fluorine-contd. linkage polyether demulsification agent and its prepn. method
  • Fluorine-contd. linkage polyether demulsification agent and its prepn. method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A fluorine-containing cross-linked polyether demulsifier, the raw material components and weight percentages of the demulsifier are as follows: (A) 1%, (B) 97%, (E) cross-linking agent 2%; A) is tetrafluoropropanol, the block polyether (B), its structural formula is:

[0030] R-O-(CH 2 CH 2 O) n H, said n is 1-18,

[0031] The (E) cross-linking agent is toluene diisocyanate (TDI).

[0032] The preparation method of the above-mentioned fluorine-containing cross-linked polyether demulsifier is to polymerize the tetrafluoropropanol (A) and the block polyether (B) under the action of the cross-linking agent toluene diisocyanate (TDI) (E). become.

[0033]The preparation method of the block polyether (B) includes the following process steps: pump the initiator into the polymerization reactor, then raise the temperature of the material to 100-120° C., and remove light components and water by vacuuming. In the material from which light components and moisture have been r...

Embodiment 2

[0035] A fluorine-containing cross-linked polyether demulsifier, the raw material components and weight percentages of the demulsifier are as follows: (A) 20%, (B) 70%, (E) cross-linking agent 10%, the ( A) is perfluoroacetic acid, described block polyether (B), its structural formula is:

[0036]

[0037] The (E) cross-linking agent is polyalkylene polyisocyanate (PAPI).

[0038] The preparation method of the above-mentioned fluorine-containing cross-linked polyether demulsifier and the preparation method of the block polyether (B) are the same as in Example 1.

Embodiment 3

[0040] A fluorine-containing cross-linked polyether demulsifier, the raw material components and weight percentages of the demulsifier are as follows: (A) 45%, (B) 40%, (E) cross-linking agent 15%, described ( A) is hexafluorobutanol, the block polyether (B), its structural formula is:

[0041]

[0042] The (E) cross-linking agent is diphenylmethane-4,4'-diisocyanate (MDI).

[0043] The preparation method of the above-mentioned fluorine-containing cross-linked polyether demulsifier and the preparation method of the block polyether (B) are the same as in Example 1.

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Abstract

This invention relates to fluorin interlinkage polyether demulsifying agent and its preparation method. The demulsifying agent made up by alcohol or acid with fluorin or alcohol, acid, hydroxybenzene, amine that contains active hydrogen or active hydroxy group or resin contains hydroxybenzene and oxygen ethylene agent and oxygen propylene agent, they conglomerate block polyether (B). There conglomeration is act under function of interlinkage agent (E) toluene disocynate or multi alkylene polyisocyanate or diphenyl methane-4,4- diisocyanate. The agent material components and their weight percentage content as following (A) 1-45%, (B) 40-97%, (E) interlinkage agent 2-15%. Comparing to existing technique, the dosage is few, desiccation temperature is low, desiccation velocity is fast, oil contain ratio of emerged water is low, it is a high efficiency and quick crude oil demulsifying agent.

Description

technical field [0001] The invention relates to a demulsifier used for oil field exploitation of crude oil, in particular to a fluorine-containing cross-linked polyether demulsifier and a preparation method thereof. Background technique [0002] At present, the research and application of crude oil demulsifiers in my country mainly focus on the block polymerization and modified varieties of oxidized olefins, which basically meet the needs of dehydration of crude oil in oilfields. However, with the use of tertiary oil recovery technology, heavy oil recovery technology and offshore oil recovery technology, demulsifiers are required to not only meet the basic performance of traditional demulsifiers, but also have the characteristics of fast, efficient and meet the requirements of dehydration process under low temperature conditions Therefore, it is of great significance to study crude oil demulsifiers from the following aspects. (1) As the eastern oilfields have successively e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/00C08G65/323
Inventor 肖稳发
Owner SHANGHAI UNIV OF ENG SCI
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