Gemini surfactant, preparation method and use method thereof

A surfactant and catalyst technology, which is applied in the preparation of sulfate esters, chemical instruments and methods, dehydration/demulsification by chemical methods, etc., can solve problems such as difficulty in applying oil displacement systems

Inactive Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although a lot of research has been done on gemini surfactants at home and abroad, the disclosed gemini surfactants are difficult to apply in the oil displacement system of tertiary oil recovery due to the limitation of structure.

Method used

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  • Gemini surfactant, preparation method and use method thereof
  • Gemini surfactant, preparation method and use method thereof
  • Gemini surfactant, preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Synthesis of sodium 1,8-di(dodecyl)-3,6-dioxa-1,8-octane disulfate:

[0054] a. Add NaH into the reactor with heating device, feed high-purity nitrogen gas at a uniform and gentle flow rate, and raise the temperature to 60°C under the protection of nitrogen atmosphere. Then ethylene glycol was added dropwise to the reactor under constant pressure, and the NaH was dissolved with continuous stirring. Continue to raise the temperature to 80°C, and then dropwise add 1,2-epoxytetradecane into the reactor at constant pressure. After the dropwise addition was completed, stir at constant temperature. After stirring the reaction for 45 hours, the heating was stopped. Slowly add 2 mol / L HCl aqueous solution to the system to stop the reaction.

[0055] Pour the reaction mixture into a separatory funnel, extract with dichloromethane / water (3×150mL / 150mL) system, combine the organic phases, dry with anhydrous sodium sulfate, and let stand overnight. Filter and evaporate the solv...

Embodiment 2

[0059] Synthesis of sodium 4,11-di(dodecyl)-3,6,9,12-tetraoxa-1,14-tetradecane disulfate:

[0060] a. Add NaH into the reactor with heating device, feed high-purity nitrogen gas at a uniform and gentle flow rate, and raise the temperature to 60°C under the protection of nitrogen atmosphere. Then ethylene glycol was added dropwise to the reactor under constant pressure, and the NaH was dissolved with continuous stirring. Continue to raise the temperature to 80°C, and then dropwise add 1,2-epoxytetradecane into the reactor at constant pressure.

[0061] After the dropwise addition was completed, stir at constant temperature. After stirring the reaction for 45 hours, the heating was stopped. Slowly add 2 mol / L HCl aqueous solution to the system to stop the reaction.

[0062] Pour the reaction mixture into a separatory funnel, extract with dichloromethane / water (3×150mL / 150mL) system, combine the organic phases, dry with anhydrous sodium sulfate, and let stand overnight. Filte...

Embodiment 3

[0066] Synthesis of 7,14-di(dodecyl)-3,6,9,12,15,18-hexaoxa-1,20-eicosane disulfate sodium:

[0067] a. Add NaH into the reactor with heating device, feed high-purity nitrogen gas at a uniform and gentle flow rate, and raise the temperature to 60°C under the protection of nitrogen atmosphere. Then ethylene glycol was added dropwise to the reactor under constant pressure, and the NaH was dissolved with continuous stirring. Continue to raise the temperature to 80°C, and then dropwise add 1,2-epoxytetradecane into the reactor at constant pressure. After the dropwise addition was completed, stir at constant temperature. After stirring the reaction for 45 hours, the heating was stopped. Slowly add 2 mol / L HCl aqueous solution to the system to stop the reaction.

[0068]Pour the reaction mixture into a separatory funnel, extract with dichloromethane / water (3×150mL / 150mL) system, combine the organic phases, dry with anhydrous sodium sulfate, and let stand overnight. Filter and ev...

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Abstract

The present invention discloses a gemini surfactant, which has a general formula represented by a formula (I), wherein the general formula of R1 comprises a general formula (a) and/or a general formula (b), R is selected from C8-C20 alkyl, preferably C12-16 alkyl, n is 0-5, preferably 0-2, the value of x is any one selected from 1-8, and 2y+z is any one selected from 2-8, preferably 2-6. The present invention further discloses a preparation method and a use method of the gemini surfactant. The general formulas I, a and b are defined in the specification.

Description

technical field [0001] The invention relates to a twinned surfactant, a preparation method and a use method thereof. Background technique [0002] At present, most of my country's oil fields have entered the high water cut period. The high temperature and high salinity of the main oil layer makes the production more difficult and the decline rate of crude oil production accelerates. In order to improve the oil recovery rate of existing oil fields, the development and application of tertiary oil recovery technology has It is imperative. [0003] There are many methods for tertiary oil recovery, and active water flooding is one of them. The method reduces the tension of the oil-water interface by adding a surfactant, thereby greatly increasing the oil recovery rate. Currently commonly used surfactants are: petroleum sulfonate, heavy alkylbenzene sulfonate, petroleum carboxylate, etc., because these traditional surfactants for oil displacement are composed of a single hydrophi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/04B01F17/42C09K8/584C07C305/10C07C303/24C10G33/04C09K23/04C09K23/42
Inventor 刘平吕成远王友启许关利卢刚陈少华
Owner CHINA PETROLEUM & CHEM CORP
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