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Preparation method of ceramic membrane used in membrane absorption process

A technology of ceramic membrane and membrane absorption, applied in the field of ceramic membrane, can solve the problems of complex process and high cost, and achieve the effect of optimizing sintering temperature and complete membrane layer

Inactive Publication Date: 2016-05-25
JIANGSU JIUWU HITECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The sol-gel method is mainly used to prepare ceramic ultrafiltration membranes with small pore sizes. This method is complex in process and needs to be coated many times, and the cost is high.

Method used

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  • Preparation method of ceramic membrane used in membrane absorption process

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preparation example Construction

[0031] The preparation method of the ceramic membrane adopted in the present invention is a hydrothermal reaction method. First, a porous ceramic support body needs to be selected, and a single-channel ceramic membrane is preferably used. Considering the strength of the membrane tube and the filling area, the outer diameter of 4 to 30 mm is preferred. porous ceramic single-channel support.

[0032] The ceramic membrane material can be selected according to the actual application system. Considering that the absorption liquid may be a highly corrosive acid or alkali solution, Al is preferred. 2 o 3 , ZrO 2 、TiO 2 , has good corrosion resistance, and can guarantee a long service life even when the absorption liquid is corrosive strong acid or strong alkali. In a preferred embodiment, a combination of the following three particles is used: Al 2 o 3 with ZrO 2 Mixture of Al 2 o 3 with TiO 2 A mixture of or ZrO 2 with TiO 2 The ceramic membrane prepared by such a combina...

Embodiment 1

[0039] Dissolving zirconium nitrate in deionized water to prepare a solution with a concentration of 0.5mol / L, adding 10wt% glycerol as a precipitant to the solution, stirring vigorously, adding ammonia or sulfuric acid solution dropwise, controlling the reaction environment to be pH= 9. Close the hydrothermal reaction, control the temperature at 200°C, cool to about 60°C after 4 hours of reaction, and wash the powder until no chloride ions can be detected in the washing liquid with 0.1mol / L silver nitrate solution. Dilute the above zirconium suspension to a zirconium content of 0.1mol / L, control the pH=3, then add a nitric acid strong electrolyte dispersant with a concentration of 5mol / L, a methylcellulose binder with a concentration of 0.4wt% and 0.1wt% Polyvinyl alcohol plasticizer, formulated into a uniformly dispersed and stable film-making solution. Then, the outer diameter is 8mm, the wall thickness is 1.5mm, the average pore diameter is 1-5μm, and the content is 99.8% ...

Embodiment 2

[0041] Add water to titanium sulfate and zirconium nitrate to prepare solutions with a concentration of 0.05 mol / L and 0.5 mol / L respectively, add urea in an amount of 4 mol / L to the solution as a precipitant, stir vigorously, add ammonia water or sulfuric acid solution dropwise, Control the reaction environment to be pH=9, close the hydrothermal reaction, control the temperature at 200°C, cool to about 60°C after 4 hours of reaction, and wash the powder until no chloride ions can be detected in the washing liquid with 0.1mol / L silver nitrate solution . Dilute the above zirconium suspension to a zirconium content of 0.1mol / L, control the pH=2, then add a strong electrolyte dispersant of nitric acid with a concentration of 5mol / L, a methylcellulose binder with a concentration of 0.4wt% and 0.1wt% Polyvinyl alcohol plasticizer, formulated into a uniformly dispersed and stable film-making solution. Then, the outer diameter is 8mm, the wall thickness is 1.5mm, the average pore di...

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Abstract

The invention discloses a preparation method of a ceramic membrane used in a membrane absorption process. The preparation method comprises the steps of selecting a TiO2, Al2O3 or ZrO2 single-channel ceramic membrane with outer diameter being 4-30mm, thickness being 0.5-10mm and average pore diameter being 0.05-5 microns, optimally preparing a coating liquid additive, drying and calcining to obtain the ceramic membrane resistant to strong acid and strong base and having water phase primary bubbling point being more than 0.1MPa. The ceramic membrane has good application prospects in the field of membrane absorption.

Description

technical field [0001] The invention relates to a method for preparing a ceramic membrane used in a membrane absorption process, and belongs to the technical field of ceramic membranes. Background technique [0002] Membrane absorption is a new type of membrane process combining membrane technology and gas absorption technology. The gas phase and absorption liquid are separated by the separation membrane as the interface. The gas-liquid two-phase mass transfer and chemical reaction occur at the membrane interface to remove harmful An approach to composition where the membrane itself is not selective. As a new type of technology, the method is widely used in the fields of chemical production, atmospheric environmental protection, biochemical industry and the like. Chinese patent CN101362044A reports a method of recycling formaldehyde waste gas by using a hollow fiber membrane and ammonia water as an absorbing liquid. Chinese patent CN1785480A relates to a method for remov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D71/02B01D69/02B01D53/22
CPCB01D67/0039B01D53/228B01D69/02B01D71/024B01D2325/30
Inventor 周邢徐德刊邓唯常冬杰吴健潘锁良
Owner JIANGSU JIUWU HITECH
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