Preparation method of organosilicon film and application of organosilicon film in pervaporation treatment of high-salinity wastewater

An organosilicon and organosilicon source technology, which is applied in osmosis/dialysis water/sewage treatment, energy waste water treatment, water/sewage treatment, etc., can solve problems such as increased operating pressure, large steam consumption, and difficulty in cleaning, and achieves increased The effect of driving force, low equipment investment, high retention rate

Active Publication Date: 2016-11-16
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the thermal distillation method, the multi-effect evaporation and salt precipitation method is mainly used to treat the high-salt wastewater, that is, the high-salt wastewater is concentrated and crystallized by three-effect or four-effect evaporation and filtered to obtain crystallized salt, but the three-effect and four-effect evaporation steam consumes a lot. Energy consumption is too high
At the same time, brine is also easy to scale in the pipeline, and it is not easy to clean; when using reverse osmosis membrane to treat brine, the operating pressure rises sharply with the increase of brine concentration (50-70 atmospheres are required to treat brine with a salt content of 35000ppm), high operating pressure Not only will it increase the processing cost, it may even damage the polymer reverse osmosis membrane and membrane components

Method used

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  • Preparation method of organosilicon film and application of organosilicon film in pervaporation treatment of high-salinity wastewater
  • Preparation method of organosilicon film and application of organosilicon film in pervaporation treatment of high-salinity wastewater
  • Preparation method of organosilicon film and application of organosilicon film in pervaporation treatment of high-salinity wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Add BTESE to absolute ethanol, then add deionized water drop by drop under stirring conditions, and finally add hydrochloric acid dropwise, the molar ratio of hydrogen chloride in BTESE, deionized water, and hydrochloric acid is 1:60:0.2, 40°C Stir in a water bath for 2 hours to obtain an organosilicon sol;

[0034] (2) α-Al 2 o 3 The particles are fully dispersed in a silica-zirconia sol with a mass fraction of 2% (in the sol, the molar ratio of silica to zirconia is 1:1), and the silica-zirconia sol and α-Al 2 o 3 The mass ratio of the particles was 10:1, and then the resulting mixed sol was coated on α-Al 2 o 3 Place the ceramic membrane in a tube furnace at 550°C for 30 minutes and repeat the process of "coating and calcination" 4 times to obtain the particle layer of the membrane;

[0035] (3) the α-Al coated with the particle layer obtained in step (2) 2 o 3 After the ceramic diaphragm was baked at 200°C for 10 minutes, a silica-zirconia sol with a mass...

Embodiment 2

[0039] (1) Add BTESE to absolute ethanol, then add deionized water drop by drop under stirring conditions, and finally add hydrochloric acid dropwise, the molar ratio of hydrogen chloride in BTESE, deionized water, and hydrochloric acid is 1:60:0.2, 40°C Stir in a water bath for 2 hours to obtain an organosilicon sol;

[0040] (2) α-Al 2 o 3 The particles are fully dispersed in a silica-zirconia sol with a mass fraction of 2% (in the sol, the molar ratio of silica to zirconia is 1:1), and the silica-zirconia sol and α-Al 2 o 3 The mass ratio of the particles was 10:1, and then the resulting mixed sol was coated on α-Al 2 o 3 Place the ceramic membrane in a tube furnace at 550°C for 30 minutes and repeat the process of "coating and calcination" 4 times to obtain the particle layer of the membrane;

[0041] (3) the α-Al coated with the particle layer obtained in step (2) 2 o 3 After the ceramic diaphragm was baked at 200°C for 10 minutes, a silica-zirconia sol with a mass...

Embodiment 3

[0045] (1) Add BTESE to absolute ethanol, then add deionized water drop by drop under stirring conditions, and finally add hydrochloric acid dropwise, the molar ratio of hydrogen chloride in BTESE, deionized water, and hydrochloric acid is 1:60:0.2, 40°C Stir in a water bath for 2 hours to obtain an organosilicon sol;

[0046] (2) α-Al 2 o 3 The particles are fully dispersed in a silica-zirconia sol with a mass fraction of 2wt.% (in the sol, the molar ratio of silica to zirconia is 1:1), and the silica-zirconia sol and α-Al 2 o 3 The mass ratio of the particles was 10:1, and then the resulting mixed sol was coated on α-Al 2 o 3 Place the ceramic membrane in a tube furnace at 550°C for 30 minutes and repeat the process of "coating and calcination" 4 times to obtain the particle layer of the membrane;

[0047] (3) the α-Al coated with the particle layer obtained in step (2) 2 o 3 After the ceramic diaphragm was baked at 200°C for 10 minutes, it was coated with 0.5wt.% silic...

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Abstract

The invention belongs to the technical field of pervaporation film separation, and particularly relates to a preparation method of an organosilicon film and application of organosilicon film in pervaporation treatment of high-salinity wastewater. An organosilicone source precursor is dissolved in absolute ethanol, deionized water is added, the mixture is stirred continuously, acid is added dropwise, and organosilicon sol is obtained; alpha-Al2O3 is dissolved in silicon dioxide-zirconium oxide sol at normal temperature and applied to a treated support, and silicon dioxide-zirconium oxide sol and organosilicon sol are applied and coated with a thermal applying method. The organosilicon film shows good hydrothermal stability during pervaporation desalination, has the advantages of high salt rejection rate, high water permeability and the like, and is particularly suitable for high-salinity wastewater difficult to treat with a reverse osmosis membrane technology.

Description

technical field [0001] The invention belongs to the technical field of pervaporation membrane separation, and in particular relates to a preparation method of an organic silicon membrane and its application in pervaporation treatment of high-salt wastewater. Background technique [0002] Many industries, such as coal chemical industry, printing and dyeing, papermaking, medicine and pesticide, will produce organic wastewater with high salt content in production. At present, desalination technologies mainly include thermal distillation technology and reverse osmosis technology based on membrane separation. In the thermal distillation method, the multi-effect evaporation and salt precipitation method is mainly used to treat the high-salt wastewater, that is, the high-salt wastewater is concentrated and crystallized by three-effect or four-effect evaporation and filtered to obtain crystallized salt, but the three-effect and four-effect evaporation steam consumes a lot. Energy c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/70B01D69/10B01D67/00C02F1/44
CPCY02A20/131Y02W10/37B01D71/70B01D67/0079B01D69/10B01D71/024B01D71/025B01D71/027C02F1/448
Inventor 徐荣李杰李舒欣钟璟
Owner CHANGZHOU UNIV
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