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A kind of silicon-containing surfactant and its preparation method and application

A silicon surfactant and solvent technology, applied in the field of silicon-containing surfactant and its preparation, can solve problems such as reducing surface tension

Active Publication Date: 2021-08-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The special hydrophobic chains (Si-O-Si﹑Si-Si and Si-C-Si) of silicone surfactants have stronger hydrophobicity than traditional hydrocarbon hydrophobic chains, and their better soft rotation makes the methyl It is tightly arranged on the water interface with a special "umbrella" structure, which can reduce the surface tension of water to 20mN m -1 around, while traditional hydrocarbon surfactants can only reduce the surface tension of water to 30-40m N m -1 about

Method used

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  • A kind of silicon-containing surfactant and its preparation method and application
  • A kind of silicon-containing surfactant and its preparation method and application
  • A kind of silicon-containing surfactant and its preparation method and application

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preparation example Construction

[0029] Concrete, a kind of preparation method of silicon-containing surfactant, comprises the following steps:

[0030] (1) Dipentaerythritol was dissolved in dimethylformamide to obtain a dipentaerythritol solution, and trimethoxy (pentyl) silane was added dropwise while stirring. Wherein the molar ratio of dipentaerythritol to trimethoxy (pentyl) silane is 1:(3-3.2). After the dropwise addition, continue to heat up to 75-85°C, and stir for 4-6 hours; the obtained product is first washed twice with 5% HCl solution, and then washed with 5% NaHCO 3 The solution was washed once, washed with water, extracted with ether, separated by liquid separation to obtain the upper organic layer, and the solvent was distilled off under reduced pressure to obtain Intermediate I.

[0031] (2) Dissolve the obtained intermediate I in dimethyl sulfoxide (DMSO) and add it to a four-necked flask. After it is completely dissolved, add about 2 g of powdered sodium hydroxide and stir the reaction at ...

Embodiment 1

[0037] Equipped with a stirrer, thermometer, dropping funnel and reflux condenser (anhydrous CaCl 2 Drying tube) in a dry 250mL four-neck flask, dissolve dipentaerythritol in dimethylformamide to obtain a dipentaerythritol solution, and add trimethoxy (pentyl) silane dropwise while stirring. The molar ratio of dipentaerythritol to trimethoxy(pentyl)silane is 1:3. After the dropwise addition was completed, the temperature was raised to 80° C., and the reaction was stirred for 5 hours. The resulting product was first washed twice with 5% HCl solution, and then washed with 5% NaHCO 3 The solution was washed once, washed with water, extracted with ether, separated by liquid separation to obtain the upper organic layer, and the solvent was distilled off under reduced pressure to obtain Intermediate I. Dissolve the obtained intermediate I in dimethyl sulfoxide (DMSO) and add it to a four-necked flask. After it is completely dissolved, add about 2 g of powdered sodium hydroxide and...

Embodiment 2

[0040] Equipped with a stirrer, thermometer, dropping funnel and reflux condenser (anhydrous CaCl 2 Drying tube) in a dry 250mL four-neck flask, dissolve dipentaerythritol in dimethylformamide to obtain a dipentaerythritol solution, and add trimethoxy (pentyl) silane dropwise while stirring. The molar ratio of dipentaerythritol to trimethoxy(pentyl)silane is 1:3. After the dropwise addition was completed, the temperature was raised to 80° C., and the reaction was stirred for 5 hours. The resulting product was first washed twice with 5% HCl solution, and then washed with 5% NaHCO 3 The solution was washed once, washed with water, extracted with ether, separated by liquid separation to obtain the upper organic layer, and the solvent was distilled off under reduced pressure to obtain Intermediate I. Dissolve the obtained intermediate I in dimethyl sulfoxide (DMSO) and add it to a four-necked flask. After it is completely dissolved, add about 2 g of powdered sodium hydroxide and...

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Abstract

The invention discloses a silicon-containing surfactant and its preparation method and application. The method comprises: 1) dissolving dipentaerythritol in a first solvent, stirring and dropping trimethoxy (pentyl) silane, and raising the temperature to 75-85 ℃, stirred and reacted for 4 to 6 hours; the obtained product was washed and extracted with ether, and the upper organic layer was obtained by liquid separation, and the solvent was distilled off under reduced pressure to obtain intermediate I; 2) intermediate I was dissolved in the second solvent, and after all After melting, add sodium hydroxide and stir at 25-35°C for 0.5-1h to react, then add carboxylate solution and heat up to 75-85°C, after heat preservation, filter the reaction product with suction to obtain a solid product I; 3) The solid product I is added to the catalyst and the third solvent, and diisocyanate is added dropwise, the reaction temperature is 40-60°C, the reaction is 3-5 hours, and then dried to obtain a silicon-containing surfactant with a mirror structure. The surfactant is used as a chemical oil displacement agent to improve the recovery rate of crude oil in tertiary oil recovery.

Description

technical field [0001] The invention relates to the technical field of surfactant preparation, in particular to a silicon-containing surfactant and its preparation method and application. Background technique [0002] With the development of new silicone materials, silicone surfactants have been used in various fields of industry. Because its structure not only contains organic groups, but also contains silicon elements, silicone surfactants not only have the good surface properties of ordinary hydrocarbon surfactants, but also have their unique advantages. [0003] The hydrophobic chain of silicone surfactant is mainly composed of polydimethylsiloxane, and its hydrophilic chain is different polar groups (such as polyether, glycoside, etc.). The special hydrophobic chains (Si-O-Si﹑Si-Si and Si-C-Si) of silicone surfactants have stronger hydrophobicity than traditional hydrocarbon hydrophobic chains, and their better soft rotation makes the methyl It is tightly arranged on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/54B01F17/44B01F17/00C09K8/584C07F7/18C09K23/54C09K23/00C09K23/44
CPCC09K8/584C07F7/1804C07F7/188C07F7/1892C09K23/00
Inventor 王晨韩非杨晓武李刚辉
Owner SHAANXI UNIV OF SCI & TECH