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High-interface-efficiency surfactant and preparation method thereof

A surfactant and interface technology, applied in the direction of sulfonate preparation, chemical instruments and methods, drilling compositions, etc., can solve the problems of high use concentration, low interface efficiency and low use concentration of surfactants for oil displacement, etc. question

Active Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems to be solved by the present invention is that the surface active agent used for oil displacement in the prior art has low interfacial efficiency, high use concentration, and the problem of precipitation of divalent ions, so a surfactant with high interfacial efficiency is provided. Surfactants have the characteristics of high interface efficiency, low concentration and resistance to divalent ions

Method used

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  • High-interface-efficiency surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Synthesis of dodecylamine polyoxyethylene (7) ether benzenesulfonate

[0031] (1) Add 93g (0.5 moles) of dodecylamine and 1% potassium hydroxide of amine weight to the reactor equipped with condensing device, stirring device and gas disperser, heat the system temperature to 85°C, turn on the vacuum system, Dehydrated under high vacuum for 1 hour, then purged with nitrogen 4 times to remove the air in the system, then adjusted the reaction temperature of the system to 120°C and slowly introduced 154g of ethylene oxide, controlled pressure 0.5MPa, temperature 150°C, Carry out alkoxylation reaction, after the reaction is completed, neutralize after cooling, vacuum dehydration, and filter to obtain dodecylamine polyoxyethylene (7) ether with a content of 99.8wt%.

[0032] (2) Put 240 g (0.5 mol) of dodecylamine polyoxyethylene (7) ether synthesized in step (1) and 40 g of finely ground sodium hydroxide (1 mol) powder into the reactor, and heat up to 70°C and slowly Slowly ...

Embodiment 2

[0037] Synthesis of dodecylamine polyoxyethylene (3) ether benzene sulfonate

[0038] (1) Add 93g (0.5 mole) of dodecylamine and 0.3% potassium hydroxide of amine weight to the reactor equipped with condensing device, stirring device and gas disperser, heat the system temperature to 85°C, turn on the vacuum system, Dehydrated under high vacuum for 1 hour, then purged with nitrogen 4 times to remove the air in the system, then adjusted the reaction temperature of the system to 120°C and slowly introduced 70g of ethylene oxide, controlled pressure 0.5MPa, temperature 150°C, Carry out alkoxylation reaction, after the reaction is completed, neutralize after cooling, vacuum dehydrate, filter to obtain dodecylamine polyoxyethylene (3) ether with a content of 99.9wt%.

[0039] (2) Put 160g (0.5 mole) of dodecylamine polyoxyethylene (3) ether synthesized in step (1) and 40g of finely ground sodium hydroxide powder in the reactor, raise the temperature to 60°C and slowly add the 216g ...

Embodiment 3

[0044] Synthesis of octadecylamine polyoxyethylene (20) ether benzenesulfonate

[0045] (1) Add 135g (0.5 moles) of octadecylamine and potassium hydroxide with 2% weight of amine to the reactor equipped with condensing device, stirring device and gas disperser, heat the system temperature to 85°C, turn on the vacuum system, Dehydrated under high vacuum for 1 hour, then purged with nitrogen 4 times to remove the air in the system, then adjusted the reaction temperature of the system to 120°C and slowly introduced 440g of ethylene oxide, controlled pressure 0.5MPa, temperature 150°C, Carry out the alkoxylation reaction, after the reaction is completed, neutralize after cooling, vacuum dehydrate, and filter to obtain octadecylamine polyoxyethylene (20) ether with a content of 99.7wt%.

[0046] (2) Put 590g (0.5 mole) of stearylamine polyoxyethylene (20) ether synthesized in step (1) and 40g of finely ground sodium hydroxide powder in the reactor, raise the temperature to 85°C and...

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Abstract

The invention relates to a high-interface-efficiency surfactant and a preparation method thereof. The problems of low interface efficiency, high use concentration and deposition after meeting divalent ions of oil displacement surfactants in the prior art are mainly solved. The molecular general formula of the high-interface-efficiency surfactant is formula I shown in the specification. In the formula I, M is anyone of alkali metals or ammonium groups, R is C8-C40 alkyl group, and the value of m+n is 1-40. The surfactant provided by the invention well solves the problems, and can be used in intensified oil production.

Description

technical field [0001] The invention relates to a surfactant with high interface efficiency and a preparation method thereof. Background technique [0002] The main oilfields in my country have entered a high water cut period after primary and secondary recovery. How to improve oil recovery and maximize the development of remaining reserves, tertiary oil recovery technology has played a very important role in ensuring stable and high production of oil fields. Among them, surfactant flooding is considered to be a chemical agent that can greatly increase recovery, has a wide range of applications, and has the most development prospects. Surfactant plays an inestimable role in greatly enhancing oil recovery, whether it is used as a main agent or as an auxiliary agent for oil displacement. [0003] The main mechanism for the use of surfactants to enhance oil recovery is: after the oil field enters the high water cut period, the remaining oil is trapped in the pores of the reser...

Claims

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Application Information

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IPC IPC(8): B01F17/12B01F17/42C09K8/584C07C309/30C07C303/32C09K23/12C09K23/42
Inventor 何秀娟张卫东沙鸥唐恒志鲍新宁
Owner CHINA PETROLEUM & CHEM CORP
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