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Preparation of double-long-chain non-ionic oil-removing surfactant and applications

A surfactant, non-ionic technology, applied in the field of colloid and interfacial chemistry, can solve problems such as the inability to meet the lipophilicity of surfactants, achieve good chemical stability, excellent interfacial tension, and reduce the effect of interfacial tension

Inactive Publication Date: 2013-07-24
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the alkyl chain length of renewable raw materials (natural oils and fats) usually does not exceed C 18 , while for some crude oil, such as Daqing crude oil, C 18 The alkyl chain length cannot meet the lipophilicity requirements of surfactants

Method used

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  • Preparation of double-long-chain non-ionic oil-removing surfactant and applications
  • Preparation of double-long-chain non-ionic oil-removing surfactant and applications
  • Preparation of double-long-chain non-ionic oil-removing surfactant and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of Didodecyl Glyceryl Ether

[0025] Add 95g (0.51mol) dodecyl alcohol, 40g (0.71mol) KOH, 3.29g (0.01mol) phase transfer catalyst and 400mL n-hexane into a 1000mL four-necked flask, stir vigorously, then slowly 47 g (0.51 mol) of epichlorohydrin was added dropwise. After the dropwise addition, the temperature was raised to 40-60° C. for 6 hours. Stand to separate layers, filter under reduced pressure, discard KOH and other solids, distill the obtained light yellow solution under reduced pressure, collect fractions at 165-172°C / 3kPa, and obtain the intermediate dodecyl glycidyl ether (C 12 GE).

[0026] Add 1.0mol of dodecanol and 8mmol of KOH into a 500mL three-necked flask, and add C dropwise while stirring. 12 GE 0.4mol. After the addition, react at 110-140°C for 12h. By measuring the C in the system 12 GE's epoxy value monitors the progress of the reaction. After the reaction, the 280~295°C / 3kPa fraction was collected by vacuum distillation to obt...

Embodiment 2

[0031] Preparation of Unsymmetrical Dilong-chain Alkyl Glyceryl Ethers

[0032] Add 95g (0.51mol) dodecyl alcohol, 40g (0.71mol) KOH, 3.29g (0.01mol) phase transfer catalyst and 400mL n-hexane into a 1000mL four-necked flask, stir vigorously, then slowly 47 g (0.51 mol) of epichlorohydrin was added dropwise. After the dropwise addition, the temperature was raised to 40-60° C. for 6 hours. Stand to separate layers, filter under reduced pressure, discard KOH and other solids, distill the obtained light yellow solution under reduced pressure, collect 165~172°C / 3kPa fraction, which is dodecyl glycidyl ether (C 12 GE).

[0033] Add 1.0mol of n-octanol and 8mmol of KOH into a 500mL three-necked flask, and add C dropwise while stirring. 12 GE 0.4mol. After the addition, react at 110-140°C for 12h. By measuring the C in the system 12 GE's epoxy value monitors the progress of the reaction. After the reaction, the 235~245°C / 3kPa fraction was collected by vacuum distillation to ob...

Embodiment 3

[0035] Dilauryl glyceryl ether ethoxylate (diC 12 GE-EO n ) preparation

[0036] Add 100g of 1,3-dodedecylglyceryl ether and 0.5g of KOH to a 0.5L autoclave, raise the temperature to 120°C, stir, and feed N into it 2 and vacuum. Raise the temperature to 160°C, introduce ethylene oxide until the pressure of the reactor is 0.35~0.40MPa, pass cooling water to make the system temperature react at 160~175°C, and continuously feed ethylene oxide to keep the pressure of the reactor at 0.1~ 0.35MPa. The consumption of ethylene oxide is measured with an electronic scale, and when it reaches the theoretical amount, the introduction of ethylene oxide is stopped. Continue the reaction until the pressure drops to zero, stop heating, cool down to 100°C and discharge.

[0037] Figure 4 and Figure 5 Respectively, the surface tension of didecyl glyceryl ether ethoxylate series products and didodecyl glyceryl ether ethoxylate series products varies with the concentration. It can be se...

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Abstract

The invention relates to a preparation of a double-long-chain non-ionic oil-removing surfactant and applications, belonging to colloid and interface chemistry fields. In the invention, by reacting fatty alcohol with chloropropylene oxide and ethylene oxide, a novel non-ionic surfactant-double-long-chain alkyl glyceryl ether ethoxy compound is prepared. The surfactant has excellent chemical stability, acid and alkali resistance and inorganic electrolyte, wherein the hydrophile lipophile balance can be regulated by controlling alkyl chain length of the raw material fatty alcohol and ethylene oxide number of added on each molecule. The surfactant has big saturation adsorption quantity on a water / air and oil / water interface, thereby high efficiency reducing a tensile force of a crude oil / water interface. The surfactant can be matched to other surfactants, wherein a mol fraction of the surfactant is 0.1-0.5, and a total mass fraction of the surfactant is in a range of 0.05-0.5%, under an oil reservoir temperature 45 DEG C, the interface tension force of Daqing crude oil / stratum water is reduced to 10-3mN / m order of magnitude, without addition of any acid salt, basic salt, neutral electrolyte and cosurfactant. Therefore, the surfactant is suitable for being used as an alkali-free oil displacement agent.

Description

technical field [0001] The invention relates to the preparation and application of a double-long-chain alkyl non-ionic non-alkali oil flooding surfactant, which belongs to the technical field of colloid and interface chemistry. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of people's living standards, my country's crude oil consumption has increased sharply. In 2011, my country's dependence on foreign crude oil has exceeded 55%. On the other hand, my country still has huge crude oil reserves, but the problem is that a considerable part of the reserves are difficult to recover by conventional methods. [0003] Only 30% to 40% of the underground crude oil reserves can be recovered in the oil field through the primary recovery (self-injection) and secondary recovery (water flooding), and 60% to 70% of the crude oil remains underground. These residual oils are usually trapped in the pores of porous rocks, and it...

Claims

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Application Information

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IPC IPC(8): C09K8/584C07C43/11C07C41/03C08G65/28
Inventor 崔正刚龙海华颜利民蒋建中裴晓梅宋冰蕾
Owner JIANGNAN UNIV
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