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Composite demulsifier and preparation process thereof

A demulsifier and composite technology, applied in the field of composite demulsifier and its preparation technology, can solve the problems of poor adaptability, poor comprehensive effect of demulsification, lack of broad spectrum, etc. Good results

Active Publication Date: 2021-11-23
胜利油田海发环保化工有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While traditional polyether demulsifiers can meet the demulsification requirements of water-in-oil emulsions in produced fluids, cationic reverse demulsifiers can better break oil-in-water emulsions. It can be seen that the existing demulsifiers are all It is used for specific crude oil under specific process conditions, does not have broad spectrum, poor adaptability, and poor comprehensive effect of demulsification

Method used

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  • Composite demulsifier and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The compound type demulsifier described in the present embodiment 1, by weight percentage, is made up of 10% nano silicon dioxide modified polyether demulsifier, 36% toluene diisocyanate modified polyether demulsifier, 5% trihydroxy Methyl propane polyoxypropylene polyoxyethylene ether, 3% ionic liquid, 1.0% sulfonated polyacrylamide, 30% diethylene glycol monobutyl ether and 15% water; the ionic liquid is 1 -A mixture of butyl-3-methylimidazolium hexafluorophosphate and bromo-1-octyl-3-methylimidazole.

[0048] in:

[0049] The mass ratio of 1-butyl-3-methylimidazole hexafluorophosphate to bromo-1-octyl-3-methylimidazole in the ionic liquid is 0.5:1.8.

[0050] The diffusion rate of bromo-1-octyl-3-methylimidazole in ionic liquid is fast, and the time required to balance the interfacial tension of oil and water is short. It is used in compound 1-butyl-3-methylimidazole hexafluorophosphate, 1 -Butyl-3-methylimidazolium hexafluorophosphate can form a conjugate effect w...

Embodiment 2

[0083] The compound type demulsifier described in the present embodiment 2, by weight percentage, is made up of 8% nano silicon dioxide modified polyether demulsifier, 32% toluene diisocyanate modified polyether demulsifier, 8% trihydroxy Methyl propane polyoxypropylene polyoxyethylene ether, 3.5% ionic liquid, 0.5% sulfonated polyacrylamide, 28% diethylene glycol monobutyl ether and 20% water; the ionic liquid is 1 -A mixture of butyl-3-methylimidazolium hexafluorophosphate and bromo-1-octyl-3-methylimidazole.

[0084] in:

[0085] The mass ratio of 1-butyl-3-methylimidazole hexafluorophosphate to bromo-1-octyl-3-methylimidazole in the ionic liquid is 0.6:1.5.

[0086] The diffusion rate of bromo-1-octyl-3-methylimidazole in ionic liquid is fast, and the time required to balance the interfacial tension of oil and water is short. It is used in compound 1-butyl-3-methylimidazole hexafluorophosphate, 1 -Butyl-3-methylimidazolium hexafluorophosphate can form a conjugate effect ...

Embodiment 3

[0119] The compound type demulsifier described in the present embodiment 3, by weight percentage, is made up of 12% nano silicon dioxide modified polyether demulsifier, 34% toluene diisocyanate modified polyether demulsifier, 5% trihydroxy Methyl propane polyoxypropylene polyoxyethylene ether, 3.5% ionic liquid, 0.5% sulfonated polyacrylamide, 35% diethylene glycol monobutyl ether and 10% water; the ionic liquid is 1 -A mixture of butyl-3-methylimidazolium hexafluorophosphate and bromo-1-octyl-3-methylimidazole.

[0120] in:

[0121] The mass ratio of 1-butyl-3-methylimidazole hexafluorophosphate to bromo-1-octyl-3-methylimidazole in the ionic liquid is 0.7:1.5.

[0122] The diffusion rate of bromo-1-octyl-3-methylimidazole in ionic liquid is fast, and the time required to balance the interfacial tension of oil and water is short. It is used in compound 1-butyl-3-methylimidazole hexafluorophosphate, 1 -Butyl-3-methylimidazolium hexafluorophosphate can form a conjugate effect...

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Abstract

The invention belongs to the technical field of demulsifiers, and particularly relates to a composite demulsifier and a preparation process thereof. The composite demulsifier disclosed by the invention is prepared from the following components in percentage by weight: a nano-silicon dioxide modified polyether demulsifying agent, a toluene diisocyanate modified polyether demulsifying agent, trimethylolpropane polyoxypropylene polyoxyethylene ether, ionic liquid, sulfonated polyacrylamide, diethylene glycol monobutyl ether and water, wherein the ionic liquid is a mixture of 1-butyl-3-methylimidazole hexafluorophosphate and bromo-1-octyl-3-methylimidazole. According to the composite demulsifier, three demulsifying agents including the nano-silica modified polyether demulsifying agent, the toluene diisocyanate modified polyether demulsifying agent and the trimethylolpropane polyoxypropylene polyoxyethylene ether are used as main demulsifying agents, the ionic liquid is used for reducing the strength of an interfacial film, a flocculating agent is used for changing oil droplets from a dispersed state into a coalescent state, and the demulsifying agents enable the demulsifying agents in a coalescent state to form a complete oil phase, so oil-water separation is realized.

Description

technical field [0001] The invention belongs to the technical field of demulsifiers, and in particular relates to a composite demulsifier and a preparation process thereof. Background technique [0002] At present, my country's crude oil exploitation has gradually entered the middle and late stages. The content of asphaltene and colloid in crude oil has increased, resulting in more stable crude oil emulsion. The composition of crude oil has become extremely complex, and the water and salt content of crude oil produced from oil fields has increased year by year, so the task of dehydration and desalination of crude oil has increased for oil fields and refineries. Crude oil containing the above impurities will increase the load on pumps and pipelines, causing corrosion and agglomeration of metal surfaces; while the oil contained in the discharged water will also cause environmental pollution and waste of crude oil. No matter from the perspective of environmental protection or e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 张泽春艾明刚李伟刘明哲程昊
Owner 胜利油田海发环保化工有限责任公司
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