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A kind of temperature-resistant and salt-resistant water-in-oil nanoemulsion and preparation method thereof

A nanoemulsion, heat-resistant and salt-resistant technology, applied in mixing methods, chemical instruments and methods, dissolution, etc., can solve problems such as poor stability, and achieve the effect of simple preparation process

Active Publication Date: 2016-11-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem of poor stability of the existing water-in-oil nanoemulsion system under high-temperature and high-salt conditions, and provides a water-in-oil nanoemulsion with temperature resistance and salt resistance, and provides a preparation method of the nanoemulsion at the same time. It can effectively improve the temperature and salt resistance of water-in-oil nanoemulsion

Method used

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  • A kind of temperature-resistant and salt-resistant water-in-oil nanoemulsion and preparation method thereof
  • A kind of temperature-resistant and salt-resistant water-in-oil nanoemulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take by weighing 1.6g T154, 33.6g white oil, 4.8g 18wt% calcium chloride brine (T154 weight percent 4%, white oil weight percent 84, calcium chloride brine weight percent 12%), mix in beaker, control system temperature Keep it at 80°C, stir on a magnetic stirrer at 400rpm for 3min (minutes) to make the system evenly stirred, at this time, use ultrasonic emulsification method, ultrasonic at 400W for 200s (seconds), and the nanoemulsion can be obtained. The average particle diameter of the emulsion measured by BI-200SM dynamic light scattering instrument is 454.7nm. The nanoemulsion was aged in a high temperature roller furnace at 180° C. for 12 hours (hours), and the average particle diameter of the emulsion was measured by a BI-200SM dynamic light scattering instrument to be 321.6 nm.

Embodiment 2

[0019] Weigh 2g OLOA1200, 28g n-dodecane, 10g 22wt% sodium chloride and the brine of calcium sulfate mass ratio 1:1 mixture (OLOA1200 weight percent 2%, n-dodecane weight percent 73%, the weight percent 25% of brine ), mix in a beaker, keep the temperature of the system at 60°C, and stir for 3 minutes at a speed of 650rpm on a magnetic stirrer to make the system evenly stirred. At this time, use ultrasonic emulsification method, ultrasonic at 300W for 200s, and nanoemulsion can be obtained . The average particle diameter of the emulsion measured by a BI-200SM dynamic light scattering instrument is 364nm. The nanoemulsion was aged in a high temperature roller furnace at 180° C. for 12 hours, and the average particle size of the emulsion was measured by a BI-200SM dynamic light scattering instrument to be 243.5 nm. The emulsion is diluted with a certain amount of white oil to obtain an emulsion such as figure 1 shown.

Embodiment 3

[0021] Take by weighing 4g LZ890, 26g liquid paraffin and 10g 20wt% iron bromide brine (LZ890 weight percentage 10%, liquid paraffin weight percentage 65%, ferric bromide brine weight percentage 25%), mix in beaker, control system temperature and keep at At 70°C, stir on a magnetic stirrer at a speed of 400rpm for 4min to make the system evenly stirred. At this time, use ultrasonic emulsification method, ultrasonic at 200W for 200s, and the nanoemulsion can be obtained. The average particle diameter of the emulsion measured by BI-200SM dynamic light scattering instrument is 201.6nm. The nanoemulsion was aged in a high-temperature roller furnace at 180° C. for 12 hours, and the average particle size of the emulsion was measured by a BI-200SM dynamic light scattering instrument to be 179.6 nm. Its particle size distribution is as figure 2 shown.

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Abstract

The invention discloses a temperature-resistant and salt-resistant water-in-oil nanometer emulsion and a preparation method thereof. The nanometer emulsion comprises the following components in percentage by weight: 5-30 percent of salt water, 1.25-10 percent of an emulsifying agent and 60-93.75 percent of alkane, wherein the concentration by mass of the salt water is 18% to 22%; the preparation method of the nanometer emulsion comprises the following steps: (1) stirring the salt water, the emulsifying agent and the alkane for 3 to 5 minutes at the temperature of 60 to 80 DEG C at a stirring speed of 200rpm to 650rpm to obtain a crude emulsion, wherein the alkane is used as an oil phase, the percentage by mass of the alkane is 60% to 93.75, the percentage by mass of the emulsifying agent is 1.25% to 10%, and the balance is the salt water; and (2) ultrasonically emulsifying the crude emulsion for 200 seconds at 200W to 400W to obtain the water-in-oil nanometer emulsion. The water-in-oil nanometer emulsion disclosed by the invention is simple in preparation process and has the characteristics of being resistant to temperature, resistant to high salt and stable in dilution.

Description

technical field [0001] The invention relates to a temperature-resistant and salt-resistant water-in-oil nanoemulsion and a preparation method thereof. Specifically, by adding a polyisobutene-based surfactant for ultrasonic emulsification, brine is stably dispersed in alkanes, and belongs to the technical field of emulsion preparation. Background technique [0002] Compared with ordinary emulsions, nanoemulsions have smaller droplet size, uniform dispersion, and certain dynamic stability. They can avoid obvious flocculation and coalescence for several months or even years. They are widely used in oil extraction, medicine, food, and building energy conservation , Concrete water-saving maintenance, agriculture, papermaking, wood-based panels, special ceramics, light industry and other fields can be better widely used. [0003] Our research group has published a variety of preparation methods of oil-in-water nanoemulsions in Chinese patent documents such as CN201210205140.3, CN2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F3/08
Inventor 孙德军张厉徐健李超侯瑞雪刘雪婧
Owner SHANDONG UNIV
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