Synthetic method of 1, 3-didecyl glyceryl ether ethoxylate

A technology of bis-decyl glycerol and ethoxylate, applied in chemical instruments and methods, ether preparation, organic chemistry, etc., can solve problems such as decreased effect and achieve good surface activity and good lipophilicity.

Inactive Publication Date: 2014-09-10
JIANGSU WAN QI BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies have shown that the commonly used surfactants for oil displacement, such as petroleum sulfonate, have a significantly reduced effect under alkali-free conditions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In this embodiment, the synthetic method of 1,3-didecylglyceryl ether ethoxylate, the synthetic method is generally obtained by three synthesis:

[0045] 1. Synthesis of decyl glycidyl ether: the weight components and production steps of each component of the formula are as follows:

[0046] Name Weight Component

[0047] n-Decanol 46.98%

[0048] Epichlorohydrin 27.6%

[0049] KOH 23.49%

[0050] Tetrabutylammonium bromide 1.93%

[0051] 400ml of n-hexane.

[0052] The n-decyl alcohol, KOH, tetrabutylammonium bromide, and n-hexane weighed in the formula are put into a 1000mL four-necked flask, stirred rapidly for 15min, and then slowly dripped into the formula with a constant pressure separating funnel. The epichlorohydrin, the dropwise time is 30min, after the dropwise addition is completed, the temperature is raised to 50°C and reacted for 6h, and the layers are allowed to stand, vacuum filtration under reduced pressure, solids such as KOH are discarded, and the...

Embodiment 2

[0066] At 25°C, the chemical properties of the product obtained in Example 1 and the commonly used surfactant sodium lauryl sulfate were detected at the air / water interface. The results showed that the product obtained in Example 1 was at the air / water interface The saturated adsorption capacity can reach 1×10 -9 mol cm 2 Order of magnitude, the molecular cross-sectional area is less than 0.16nm 2 ; while the saturated adsorption capacity of commonly used surfactant sodium lauryl sulfate on the air / water interface is about 3.16×10 -10 mol cm 2 Order of magnitude, the molecular cross-sectional area is about 0.53nm 2 , it can be seen that the product obtained in Example 1, 1,3-didecylglyceryl ether ethyl oxide molecules are closely arranged on the gas / liquid interface.

Embodiment 3

[0068]The 1,3-didecylglyceryl ether ethyl oxide was compounded with carboxybetaine amphoteric surfactants, and the ability of the compound system to reduce the interfacial tension of crude oil / formation water was investigated at 45°C. The mass fraction is 0.05%-0.5%, wherein the molar fraction of 1,3-didecylglyceryl ether ethyl oxide is 0.4, and the water phase contains 1000mg / L polyacrylamide. The results show that the 1,3 - Didecyl glyceryl ether ethyl oxide has good lipophilicity, and can reduce the equilibrium interfacial tension of crude oil / formation water to 10 without adding any alkali, alkaline salt, neutral electrolyte or co-surfactant -3 mN·m -1 Magnitude.

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Abstract

The invention discloses a synthetic method of 1, 3-didecyl glyceryl ether ethoxylate. According to the technical scheme, the synthetic method comprises three synthesis operations: reacting n-decyl alcohol with epoxy chloropropane to obtain decyl glycidyl ether and 1, 3-didecyl glyceryl ether; and adding ethylene oxide to the 1, 3-didecyl glyceryl ether to obtain the 1, 3-didecyl glyceryl ether ethoxylate. The method disclosed by the invention has the following effects that the ethoxylate has good lipophilicity and surface activity; the ethoxylate is compounded with a carboxyl glycine betaine ampholytic surfactant to reduce the tension of crude oil / formation water balanced interface to 10<-3>mN / m order of magnitudes without adding any alkalis, basic salts, neutral electrolytes or cosurfactants.

Description

technical field [0001] The invention relates to the technical field of oil recovery, in particular to a synthesis method of 1,3-didecyl glyceryl ether ethoxylate. Background technique [0002] my country's dependence on foreign crude oil has reached about 55%, and is still increasing. The use of surfactants to improve the recovery of residual oil after water flooding is of great strategic significance for increasing crude oil production in old oilfields and alleviating the rapid growth of my country's dependence on foreign crude oil. Due to the discovery of the side effects of alkali, replacing ASP flooding with alkali-free binary compound flooding has become a new trend in the development of surfactant flooding technology. However, studies have shown that the effect of commonly used surfactants for oil displacement, such as petroleum sulfonate, is significantly reduced under alkali-free conditions. Contents of the invention [0003] In order to solve the above problems,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/13C07C41/03C09K8/584
CPCC07C41/03C07D301/28C07D303/04C09K8/584C07C43/135
Inventor 金瑞
Owner JIANGSU WAN QI BIOLOGICAL TECH
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