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Fluorine-containing nonionic demulsifier and preparation method thereof

A non-ionic, demulsifier technology, used in chemical dehydration/demulsification, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problems of low surface activity, accompanied by toxicity, large amount of use, etc., and achieves a large amount of dehydration. , the dehydration speed is fast, the effect of adding a small amount

Active Publication Date: 2022-01-04
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most demulsifiers are hydrocarbon demulsifiers. Because their surface activity is lower than that of fluorocarbon active agents, and hydrocarbon demulsifiers use a large amount of solvents, they are also volatile, accompanied by toxicity, and high cost. Therefore, fluorine-containing Demulsifier is also a development trend

Method used

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  • Fluorine-containing nonionic demulsifier and preparation method thereof
  • Fluorine-containing nonionic demulsifier and preparation method thereof
  • Fluorine-containing nonionic demulsifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This embodiment prepares a kind of fluorine-containing nonionic demulsifier, specifically comprises the following steps:

[0056] Take 20g of 3,4,5-trifluorophenol and 51g of tetraethylenepentamine and put them into a four-neck bottle, raise the temperature of the water bath to 50°C to completely dissolve and keep it warm for 15 minutes, then slowly add 10g of 40wt.% formaldehyde solution dropwise, and keep it warm for 30 minutes after the dropwise addition Fully react, add 40g of xylene to the four-necked bottle, heat up to 110°C, reflux and dehydrate for 2 hours, then raise the temperature to 190°C, at this time, the transparency of the reactants and xylene gradually increases, and the xylene is completely distilled out at 190°C, keeping After 1 hour of reaction, the reaction was completed, and the fluorine-containing initiator was obtained.

[0057] Take 5g of fluorine-containing initiator and 1.37g of catalyst potassium hydroxide and put them into a high-temperature...

Embodiment 2

[0061] This embodiment prepares a kind of fluorine-containing nonionic demulsifier, specifically comprises the following steps:

[0062] Take 20g of 3,4,5-trifluorophenol and 51g of tetraethylenepentamine and put them into a four-neck bottle, raise the temperature of the water bath to 50°C to completely dissolve and keep it warm for 15 minutes, then slowly add 10g of 40wt.% formaldehyde solution dropwise, and keep it warm for 30 minutes after the dropwise addition Fully react, add 40g of xylene to the four-necked bottle, heat up to 110°C, reflux and dehydrate for 2 hours, then raise the temperature to 190°C, at this time, the transparency of the reactants and xylene gradually increases, and the xylene is completely distilled out at 190°C, keeping After 1 hour of reaction, the reaction was completed, and the fluorine-containing initiator was obtained.

[0063] Take 5g of fluorine-containing initiator and 2.53g of catalyst potassium hydroxide and add them into a high-temperature...

Embodiment 3

[0067] This embodiment prepares a kind of fluorine-containing nonionic demulsifier, specifically comprises the following steps:

[0068] Take 20g of 3,4,5-trifluorophenol and 51g of tetraethylenepentamine and put them into a four-neck bottle, raise the temperature of the water bath to 50°C to completely dissolve and keep it warm for 15 minutes, then slowly add 10g of 40wt.% formaldehyde solution dropwise, and keep it warm for 30 minutes after the dropwise addition Fully react, add 40g of xylene to the four-necked bottle, heat up to 110°C, reflux and dehydrate for 2 hours, then raise the temperature to 190°C, at this time, the transparency of the reactants and xylene gradually increases, and the xylene is completely distilled out at 190°C, keeping After 1 hour of reaction, the reaction was completed, and the fluorine-containing initiator was obtained.

[0069] Take 5g of fluorine-containing initiator and 4.79g of catalyst potassium hydroxide and add them into a high-temperature...

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Abstract

The invention discloses a fluorine-containing nonionic demulsifier and a preparation method thereof. The fluorine-containing nonionic demulsifier is prepared by the following steps: carrying out a block polymerization reaction on a fluorine-containing initiator, epoxypropane and ethylene oxide under the catalytic action of alkali to obtain fluorine-containing polyether, and carrying out a cross-linking reaction on the fluorine-containing polyether and diisocyanate to obtain the fluorine-containing nonionic demulsifier, wherein the fluorine-containing initiator is obtained by carrying out a coupling reaction on 3,4,5-trifluorophenol, tetraethylenepentamine and an aqueous formaldehyde solution. The fluorine-containing nonionic demulsifier disclosed by the invention has the same stability as a nonionic demulsifier and the same high surface activity of as a fluorocarbon demulsifier. Compared with the prior art, the fluorine-containing nonionic demulsifier has the characteristics of small dosage, high dehydration speed, low oil content of dehydrated water and the like, and is an efficient and rapid crude oil demulsifier.

Description

technical field [0001] The invention relates to the technical field of oilfield chemicals, in particular to a fluorine-containing nonionic demulsifier and a preparation method thereof. Background technique [0002] With the application of tertiary oil recovery, most of the crude oil emulsions have been denatured at present, that is, O / W type is the main type, and even W / O / W type has appeared, which brings difficulties to the oil-water separation agent. Therefore, a modified demulsifier based on polyether was synthesized through a series of modification techniques. Compared with anionic and cationic demulsifiers, nonionic demulsifiers have the advantages of good hard water resistance, interface activity stability, temperature stability and biodegradation resistance. Although the price is higher, its application is still expanding. [0003] At present, most demulsifiers are hydrocarbon demulsifiers. Because their surface activity is lower than that of fluorocarbon active agen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
CPCC10G33/04C10G2300/1033C10G2300/208
Inventor 谢水祥郭海莹任雯李兴春唐善法程远鹏仝坤张明栋刘晓辉
Owner BC P INC CHINA NAT PETROLEUM CORP