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Oil-soluble demulsifier and preparation method thereof

A demulsifier, oil-soluble technology, applied in the field of oil-soluble demulsifier and its preparation, can solve the problems of difficult control of esterification reaction conditions, unsuitable for large-scale production, incomplete reaction, etc., to achieve good emulsification stability, excellent Application effect, effect of improving demulsification effect

Inactive Publication Date: 2016-07-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-efficiency oil-soluble demulsifier for heavy oil oilfields reported in patent CN104927896A is made by esterification in terms of reaction mode, but the conditions of esterification reaction are not easy to control, and it is a reversible reaction. Generally, the reaction is not complete , which will cause waste of raw materials and inconvenience to subsequent processing
and not suitable for mass production
The raw naphtha used in this patent also has the problem of high toxicity and harm to the human body and the environment

Method used

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  • Oil-soluble demulsifier and preparation method thereof
  • Oil-soluble demulsifier and preparation method thereof
  • Oil-soluble demulsifier and preparation method thereof

Examples

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Effect test

Embodiment 1

[0043] Add 1.25g of phenyl hydrogen-containing silicone oil and 1.19g of isopropanol into the reaction kettle, raise the temperature to 70°C under stirring, and add 1.19×10 -4 g catalyst, then warmed up to 80°C, and then added dropwise a mixture of 0.8416g 1-dodecene and 1.875g polyether for 10 minutes. Low boilers and unreacted raw materials, resulting in oil-soluble demulsifiers.

Embodiment 2

[0045] Add 1.25g of phenyl hydrogen-containing silicone oil and 1.23g of isopropanol into the reaction kettle, raise the temperature to 70°C under stirring, and add 1.23×10 -4 g catalyst, then heated up to 90°C, and then added dropwise a mixture of 0.8837g 1-dodecene and 1.969g polyether for 20 minutes. Low boilers and unreacted raw materials, resulting in oil-soluble demulsifiers.

Embodiment 3

[0047] Add 1.25g of phenyl hydrogen-containing silicone oil and 1.27g of isopropanol into the reaction kettle, raise the temperature to 70°C under stirring, and add 1.27×10 -4 g catalyst, then warmed up to 100°C, and then added dropwise a mixture of 0.9258g 1-dodecene and 2.063g polyether for 30 minutes. Low boilers and unreacted raw materials, resulting in oil-soluble demulsifiers.

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Abstract

The invention discloses an oil-soluble demulsifier and a preparation method thereof. The preparation method comprises the following steps: adding phenyl hydrogen-containing silicone oil and an organic solvent into a reaction kettle; heating to 70 to 75 DEG C with stirring; adding a suitable amount of catalyst at the temperature; then heating to 80 to 130 DEG C; dropwise adding a mixture of long-chain carbon olefins and polyether; after the mixture is dropwise added, reacting for 5 to 10 hours at the temperature; distilling under a reduced pressure to remove low-boiling-point substances and unreacted raw materials to obtain the novel oil-soluble demulsifier, wherein the molar ratio of the phenyl hydrogen-containing silicone oil to the mixture of polyether and long-chain alkyl is 1:(1-1.3); the molar ratio of polyether to long-chain carbon olefins is 1:(1-4). The novel oil-soluble demulsifier provided by the invention can prolong action time in demulsification application, and moreover, has the advantages of high-efficiency demulsifying effect, wide application range, small using amount and low toxicity.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and is applied to the demulsification and dehydration of crude oil, in particular to an oil-soluble demulsifier and a preparation method thereof. Background technique [0002] Crude oil extraction has entered the stage of tertiary oil recovery, coupled with the wide use of various oilfield additives, the composition of crude oil production fluid is more complex, the crude oil emulsion is more stable, and the difficulty of demulsification is becoming more and more difficult. If conventional demulsifiers are used for treatment, it is necessary to increase the dosage and demulsification temperature, which will inevitably lead to increased costs and energy consumption. Therefore, it is urgent to develop new and efficient demulsifiers. [0003] The demulsifiers on the market are divided into two categories: water-soluble and oil-soluble, and the commonly used demulsifiers are mostly block polyeth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/46C08G77/38C10G33/04
CPCC08G77/46C08G77/38C10G33/04
Inventor 郭睿杨江月李欢乐刘爱玉程敏甄建斌王超李晓芳
Owner SHAANXI UNIV OF SCI & TECH
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