Method for emulsifying oil product through membrane

A membrane emulsification and oil product technology, applied in the field of membrane emulsification, can solve the problems of difficult control of emulsion particle size and low flux of membrane emulsification technology, and achieve good chemical stability and thermal stability, good anti-pollution performance, high The effect of emulsifying flux

Pending Publication Date: 2022-05-13
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the problems of difficult control of the particle size of emulsion droplets in traditional emulsification technology and the low flux of existing membrane emulsification technology, select a new type of membrane material that can be used for membrane emulsification in harsh environments, and adjust its surface properties and operating parameters. Provides a method for membrane emulsified oil with low energy consumption and high flux

Method used

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  • Method for emulsifying oil product through membrane
  • Method for emulsifying oil product through membrane
  • Method for emulsifying oil product through membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The raw material components for preparing the emulsion include lubricating oil and deionized water. Preheat the lubricating oil to 50°C and prepare 40mL of hexadecyltrimethoxysilane with a concentration of 0.05mol / L by using a sheet-type silicon carbide ceramic membrane with an average pore size of 500nm and a porosity of 48% as a modified carrier The (HDTMS) / ethanol solution was stirred at 35° C. for 2 h and set aside. Soak the silicon carbide ceramic membrane in 0.05 mol / L HDTMS / ethanol solution for 12 hours. After taking it out, clean the surface of the membrane with absolute ethanol and dry it in an oven at 120°C for later use. figure 2 It is the SEM picture of the silicon carbide ceramic membrane prepared in the laboratory. It can be seen that the microstructure of the membrane has not changed significantly before and after hydrophobic modification. image 3 (a) is the pore size distribution diagram of the hydrophilic silicon carbide ceramic membrane, image 3 (...

Embodiment 2

[0037] A sheet-type silicon carbide ceramic membrane with an average pore diameter of 500 nm and a porosity of 30% was used as a modified carrier, and 20 mL of HDTMS / ethanol solution with a concentration of 0.03 mol / L was prepared and stirred at 35°C for 2 h for later use. Spray 5mL of 0.03mol / L HDTMS / ethanol solution evenly on the surface of the silicon carbide film, the spray rate is 0.1mL / s, and the spray volume is 1.5mL / cm 2 , put it in an oven at 120°C and dry it for later use. The water contact angle on the surface of the modified film is 135°. The raw material components for preparing the emulsion include lubricating oil and deionized water. Preheat the lubricating oil to 50°C for later use. A constant flow pump is used to transport the dispersed phase at a constant flow rate, but it is not limited to this. A peristaltic pump is used to provide the membrane surface shear force formed by the continuous phase flow, and the membrane surface velocity is controlled to be 0....

Embodiment 3

[0039] A sheet-type silicon carbide ceramic membrane with an average pore diameter of 500 nm and a porosity of 26% was used as a modified carrier, and 40 mL of HDTMS / ethanol solution with a concentration of 0.05 mol / L was prepared and stirred at 35°C for 2 h for later use. Soak the silicon carbide ceramic membrane in 0.05mol / L HDTMS / ethanol solution for 12 hours, wash the surface of the membrane with absolute ethanol after taking it out, and dry it in an oven at 120°C for later use. The water contact angle of the modified membrane surface is 140 °. The raw material components for preparing the emulsion include lubricating oil and deionized water. Preheat the lubricating oil to 50°C for later use. A constant flow pump is used to transport the dispersed phase at a constant flow rate, but it is not limited to this. A peristaltic pump is used to provide the membrane surface shear force formed by the continuous phase flow, and the membrane surface velocity is controlled to be 0.68...

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Abstract

The invention relates to a method for emulsifying an oil product by using a membrane, which is characterized in that a high-flux silicon carbide membrane with a specific structure after surface property regulation is adopted as an emulsifying medium, water is adopted as a dispersion phase, an oil product is adopted as a continuous phase, the dispersion phase passes through ceramic membrane holes at low pressure and high flux, and the oil product is emulsified under the action of shearing force formed by continuous phase flowing. The dispersed phase leaves the surface of the membrane and enters the continuous phase, so that water and oil are fully mixed and dissolved, and water-in-oil emulsion with uniform particle size is formed. The method has the advantages of high flux, low energy consumption, simple device and the like, is a way for efficiently preparing the water-in-oil emulsion, and is suitable for large-scale industrial application, and liquid drop coalescence can be reduced and the emulsion stability can be improved under the condition that an emulsifier is not added by regulating and controlling the surface properties and operation parameters of the membrane.

Description

technical field [0001] The invention belongs to the field of membrane emulsification and relates to a method for membrane emulsification of oil products, in particular to the regulation and control of the surface properties of a high-throughput silicon carbide membrane with a specific structure and its application in the preparation of oil emulsions. Background technique [0002] Emulsions are formed by the competition between two opposing processes of liquid splitting into fine droplets and recombination into the original liquid. Water-in-oil emulsions have been widely used in medicine, cosmetics and food industries because of the regular shape of water droplets inside them, and can prepare nanoparticles and microspheres with uniform particle size. The application in the petrochemical industry is developing rapidly. At present, the preparation methods of water-in-oil emulsions can be mainly divided into three categories. The first category is the low-energy emulsification ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F23/41C10L1/32
CPCC10L1/328
Inventor 邢卫红王雅欣江倩景文珩仲兆祥范益群徐南平
Owner NANJING UNIV OF TECH
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