Method for preparing tubular ceramic membrane for oil-water separation

A technology of oil-water separation and ceramic membrane, which is applied in the chemical field and can solve the problem of low filtration flux

Active Publication Date: 2014-01-22
上海赛奥分离技术工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preparing a tubular ceramic membrane for oil-water separation. The method for preparing the tubular ceramic membrane for oil-water separation needs to solve the problem of the ceramic membrane in the prior art when dealing with the oil phase system. The technical problem of its low filtration flux

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Three aluminum oxide ceramic membrane tubes with an initial bubble point of 0.52Mpa were respectively selected as substrates; polytetrafluoroethylene membrane-making liquid was prepared in a pure water system, and the mass percent concentration of polytetrafluoroethylene in the membrane-making liquid was controlled at 3.3 %, completely dissolved and left to stand for 12 hours, under stirring, slowly add porogen and special binder, control the final mass percentage concentration of porogen to 0.04%, and the final mass percentage concentration of binder to 0.01% ; In this process, KCL is used as porogen, and aluminate is used as binder. During the coating process, the flow rate of the membrane-forming liquid is controlled to 1.5 m / s, the pressure difference between the inlet and outlet of the membrane tube is 0.12Mpa, and the coating time is 35s; the coated ceramic membrane tube is dried in an oven, and the temperature of the oven is controlled at 120°C. Time 8h. The dri...

Embodiment 2

[0014] Three aluminum oxide ceramic membrane tubes with an initial bubble point of 0.52Mpa were respectively selected as substrates; polyvinylidene fluoride membrane-making liquid was prepared in a pure water system, and the mass percentage of polyvinylidene fluoride membrane-making liquid in the membrane-making liquid was Control the concentration at 5.6%, let it stand for 12 hours after completely dissolving, and slowly add porogen and binder under stirring, control the final mass percentage concentration of porogen to 0.07%, and the final mass percentage of binder The concentration is 0.02%; among them, KCL is used as the porogen, and phosphate is used as the binder. During the coating process, the flow rate of the membrane-forming liquid is controlled to 1 m / s, the pressure difference between the inlet and outlet of the membrane tube is 0.12Mpa, and the coating time is 20s; the coated ceramic membrane tube is dried in an oven, and the temperature of the oven is controlled a...

Embodiment 3

[0017] Three aluminum oxide ceramic membrane tubes with an initial bubble point of 0.58Mpa were respectively selected as substrates; polyvinylidene fluoride film-making liquid was prepared in a pure water system, and the mass percentage concentration of polyvinylidene fluoride in the film-making liquid was controlled At 7.8%, let it stand for 12 hours after completely dissolving, and slowly add porogen and binder under stirring, control the final mass percentage concentration of porogen to 0.08%, and the final mass percentage concentration of binder The concentration is 0.03%; NaCl is used as the porogen, and borate is used as the binder. During the coating process, the flow rate of the membrane-forming liquid was controlled to be 1.8 m / s, the pressure difference between the inlet and outlet of the membrane tube was 0.16Mpa, and the coating time was 45s; the coated ceramic membrane tube was dried in an oven, and the temperature of the oven was controlled at 1.5°C. Time 12h. T...

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Abstract

A method for preparing a tubular ceramic membrane for oil-water separation includes the steps of selecting an aluminum oxide ceramic membrane tube with the initial bubble point larger than 0.5Mpa as a base body, coating a layer of fluorine-contained or silicone-contained membrane preparing liquid on the base body, and placing the ceramic membrane tube which undergoes the coating procedure into a drying oven to be dried, wherein parameters in the coating procedure include the flow velocity, ranging from 1m/s to 5m/s, of the membrane preparing liquid, the inlet and outlet pressure difference, ranging from 0.1MPa to 0.2MPa , of the membrane tube and the flow coating time ranging from 5 seconds to 60 seconds, the temperature in the drying oven ranges from 50 DEG C to 150 DEG C, and the drying time ranges from 1 hour to 18 hours. The product obtained through the method is suitable for an oil-water separation system with the oil content higher than 70%, and the water content in an oil phase obtained through oil-water separation can reach less than 200ppm.

Description

Technical field: [0001] The invention relates to the field of chemistry, in particular to a preparation method of a ceramic membrane, in particular to a preparation method of a tubular ceramic membrane used for oil-water separation. Background technique: [0002] Membrane separation is a contemporary high-efficiency separation technology, which is widely used in environmental protection and sewage treatment, desalination of seawater and brackish water, preparation of pure water and ultrapure water, biological separation and medical instruments, etc. A new way. Ceramic membrane is a separation membrane made of ceramic material sintered at high temperature. Due to its unique strength and corrosion resistance, it has become one of the fastest-growing and most promising varieties in the membrane field as soon as it enters the market. Ceramic membrane technology is the leader in membrane technology. In the prior art, ceramic membranes are mainly used in water phase systems. Wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/36B01D69/04B01D67/00B01D17/022C02F1/40
Inventor 刘旭红陶锐于爱国黄斌赖新生
Owner 上海赛奥分离技术工程有限公司
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