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Self-emulsifying lactescence and its preparation method

An emulsion and self-emulsification technology, which is applied in the field of self-emulsification emulsion and its preparation, can solve the problems of unfavorable environmental protection, high cost, and long preparation cycle, and achieve the effects of environmental protection, low biological toxicity, and good self-emulsification performance

Active Publication Date: 2018-05-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of nano-silica strengthens the viscosity and stability of the oil-in-water emulsion, which can not only improve the oil washing efficiency of chemical flooding, but also improve the sweep coefficient; but the preparation of the emulsion of this invention needs to be carried out at a high speed Stir homogeneously, the preparation cycle is long and the cost is high; and white oil is used, which is not conducive to environmental protection

Method used

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  • Self-emulsifying lactescence and its preparation method
  • Self-emulsifying lactescence and its preparation method
  • Self-emulsifying lactescence and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of self-emulsifying emulsion, comprising steps as follows:

[0027] Weigh 30ml of silane coupling agent A172 and add it to 70ml of biodiesel, stir evenly, as the oil phase. Weigh 3.333g of nano-silica sol (effective content 30wt%, wherein nano-silica particle size is 12nm) and add to 96.667g distilled water as the water phase, the concentration of silica in the water phase is 1.0wt%. Weigh 18ml of the water phase and add it to the sample bottle, then weigh 2ml of the oil phase and add it to the above sample bottle. Shake gently 10 times, from emulsifying emulsion. After standing at 20°C for 3h, 12h, and 24h, the emulsion still maintained good stability. After standing at 20°C for 24h, the particle size of the emulsion was measured with a winner2000 laser particle size analyzer, and the results are shown in the table below.

[0028] Table 1 Particle size of A172 self-emulsifying emulsion

[0029]

[0030] From the particle size analysis results...

Embodiment 2

[0034] A preparation method of self-emulsifying emulsion, comprising steps as follows:

[0035] Weigh 35ml of silane coupling agent A172 and add it to 65ml of biodiesel, stir evenly, as the oil phase. Weigh 2.667g of nano-silica sol (effective content 30wt%, nano-silica particle size 15nm) into 97.333g distilled water as the water phase, the concentration of silica in the water phase is 0.8wt%. Weigh 18.5ml of the water phase and add it to the sample bottle, then weigh 1.5ml of the oil phase and add it to the above sample bottle. Shake gently 10 times, from emulsifying emulsion. After standing at 20°C for 3h, 12h, and 24h, the emulsion still maintained good stability. After standing at 20°C for 24h, the particle size of the emulsion was measured with a winner2000 laser particle size analyzer, and the results are shown in the table below.

[0036] Table 2 Particle size of A172 self-emulsifying emulsion

[0037]

[0038] From the particle size analysis results in Table 2, ...

Embodiment 3

[0042] A preparation method of self-emulsifying emulsion, comprising steps as follows:

[0043] Weigh 40ml of silane coupling agent KH702 and add it to 60ml of biodiesel, stir evenly, as the oil phase. Weigh 1.667g of nano-silica sol (effective content 30wt%, nano-silica particle size 15nm) and add to 98.333g distilled water as the water phase, the concentration of silica in the water phase is 0.5wt%. Weigh 19ml of the water phase and add it to the sample bottle, then weigh 1ml of the oil phase and add it to the above sample bottle. Shake gently 10 times, from emulsifying emulsion. After standing at 20°C for 3h, 12h, and 24h, the emulsion still maintained good stability. After standing at 20°C for 24h, the particle size of the emulsion was measured with a winner2000 laser particle size analyzer, and the results are shown in the table below.

[0044] Table 3 KH702 self-emulsifying emulsion particle size table

[0045]

[0046] From the particle size analysis results in Ta...

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Abstract

The invention provides a self-emulsifying lactescence and its preparation method. The self-emulsifying lactescence comprises a water phase and an oil phase; the water phase comprises colloidal silicasol and water; the oil phase comprises silane coupling agent and biodiesel; the volume ratio of the oil phase and the water phase is 1: 5-1: 25. The lactescence is prepared without massive external forces, the stable Pickering lactescence can be acquired under the condition of slight shake or swaying; the grain diameter of the lactescence prepared by the invention is relatively small, and the self-emulsifying lactescence has good stability and can effectively improve the harvesting rate of water displacing oil.

Description

technical field [0001] The invention relates to a self-emulsifying emulsion and a preparation method thereof, belonging to the technical field of colloid and interface chemistry. Background technique [0002] Oil-in-water emulsions use surfactants as emulsifiers to disperse the oil phase in water in the form of tiny droplets, and through the Jiamin effect of oil-in-water emulsions in formation seepage, it can effectively increase the crude oil output of water flooding. In order to enhance the interfacial effect and stability of the emulsion, people introduce solid particles and surfactants to stabilize the emulsion together. This type of emulsion is called Pickering emulsion. Pickering emulsion can reduce the amount of surfactant and improve the emulsion. stability. The colloidal particles used to prepare Pickering emulsions in the early stage are relatively large, which limits the application of Pickering emulsions. In recent years, due to the development of nanomaterials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/58
CPCC09K8/58C09K8/584C09K2208/10
Inventor 蒋平李鹤张磊葛际江张贵才裴海华孙铭勤
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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