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Preparation method of ceramic membrane with adsorption and interception functions

A technology of ceramic membrane and ceramic sheet, which is used in adsorption water/sewage treatment, household appliances, clay products, etc., can solve the problems of unreported ceramic membrane, limitation of attapulgite, etc., and achieves enhanced adsorption performance and interception function. The effect of the adsorption effect

Inactive Publication Date: 2011-11-30
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the research on the application of attapulgite is only limited to the powder form, and the research on making ceramic membranes has not been reported.

Method used

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  • Preparation method of ceramic membrane with adsorption and interception functions

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Mix 8.345g of attapulgite with 10ml of deionized water, stir mechanically at room temperature, mix until it becomes a paste, slowly pour it into a mold and press it into shape, and preform it into a diameter of 2.9cm and a thickness of 1.3cm after demoulding round flake ceramics.

[0021] (2) The prefabricated ceramic sheets are aged in a constant humidity environment for 5 days, taken out and dried in a natural environment for 3 days, so that the inner and outer moisture of the ceramic sheets are evenly dried to complete.

[0022] (3) Sent to the muffle furnace for high-temperature calcination, the initial temperature is 50°C, the final calcination temperature is 350°C, the heating rate is 1.5°C / min, the holding time is 2h, and the cooling rate is 1°C / min.

[0023] (4) After cooling, smooth the surface with 120#~360# sandpaper. Use a soft brush to remove dust and residual powder on the surface of the ceramic sheet.

[0024] (5) Configure a sulfuric acid solution ...

Embodiment 2

[0029] (1) Mix 8.297g of attapulgite with 10ml of deionized water, stir mechanically at room temperature, mix until it becomes a paste, slowly pour it into a mold for compression molding, and pre-form a diameter of 2.9cm and a thickness of 1.3cm after demoulding round flake ceramics.

[0030] (2) The prefabricated ceramic sheet is first aged in a constant humidity environment for 7 days, taken out and dried in a natural environment for 5 days, so that the inner and outer moisture of the ceramic sheet is evenly dried to complete.

[0031] (3) Send to muffle furnace for high-temperature calcination, the initial temperature is 50°C, the final calcination temperature is 450°C, the heating rate is 1°C / min, the holding time is 2h, and the cooling rate is 1°C / min. No inert protective gas is required during calcination.

[0032] (4) After cooling, smooth the surface with 120#~360# sandpaper. Use a soft brush to remove dust and residual powder on the surface of the ceramic sheet.

...

Embodiment 3

[0036] (1) Mix 8.009g of attapulgite with 9ml of deionized water, stir mechanically at room temperature, mix until it becomes a paste, slowly pour it into a mold and press it into shape, and preform it into a diameter of 2.9cm and a thickness of 1.2cm after demoulding round flake ceramics.

[0037] (2) The prefabricated ceramic sheets are aged in a constant humidity environment for 5 days, taken out and dried in a natural environment for 3 days, so that the inner and outer moisture of the ceramic sheets are evenly dried to complete.

[0038] (3) Sent to the muffle furnace for high-temperature calcination, the initial temperature is 50°C, the final calcination temperature is 250°C, the heating rate is 2.5°C / min, the holding time is 2h, and the cooling rate is 1°C / min.

[0039] (4) After cooling, smooth the surface with 120#~360# sandpaper. Use a soft brush to remove dust and residual powder on the surface of the ceramic sheet.

[0040](5) Configure a sulfuric acid solution wi...

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Abstract

The invention provides a preparation method of a novel ceramic membrane with adsorption and interception functions. Combining modern adsorption technology and membrane technology, attapulgite is used to prepare a new type of ceramic membrane. Mix the attapulgite and deionized water evenly until it becomes a paste, pour it into a mold and press it into a circular ceramic sheet. It is first aged in a constant humidity environment for 3-7 days, taken out and dried in the natural environment of the laboratory for 2-5 days, sent to a muffle furnace for calcination, and after cooling, the surface is smoothed with sandpaper. configuration. The ceramic sheet is immersed in a sulfuric acid solution with a pH value of 2 to 6 for 8 to 24 hours, taken out, washed, soaked in deionized water for 8 to 24 hours, and dried under a dust-removing environment to form a ceramic film. The pore diameter of the ceramic membrane is 10-70nm, and it has adsorption performance and interception function at the same time. In addition to adsorption and retention of organic macromolecules, it also has good adsorption effect on small molecular organic substances and metal ions, and has the value of industrial promotion.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to the preparation of a new type of ceramic membrane. The new type of ceramic membrane has both adsorption performance and interception function, and is suitable for the treatment of refractory organic waste water such as printing and dyeing, and is also suitable for the treatment of electrocatalyzed waste water. High temperature condensate. Background technique [0002] At present, water resources are increasingly depleted and polluted, so it is necessary and urgent to rationally develop and protect water resources. The organic wastewater in the printing and dyeing, pharmaceutical, pesticide and other industries is difficult to be degraded by bacteria, which is a difficult problem in wastewater treatment. Ceramic membranes have a series of advantages to make them applied in water treatment processes. [0003] Chinese invention patent "Gradient Ceramic Mem...

Claims

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Application Information

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IPC IPC(8): C04B33/00C02F1/28
Inventor 魏刚李华芳乔宁陈晓晓
Owner BEIJING UNIV OF CHEM TECH
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