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Interphase carbon microball base tube type charcoal film and its preparation method

A mesophase carbon microsphere and carbon membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems affecting pore size distribution and pore structure, low carbon content, complex preparation process, etc. , to achieve the effect of developed pore structure, uniform pore size distribution and good separation performance

Inactive Publication Date: 2008-03-26
天津佰腾生产力促进中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the carbon content in the above-mentioned various raw materials is not very high, and the carbon residue rate of the raw materials after carbonization is directly related to the mechanical strength of the carbon membrane. At the same time, the irregular shape of the above-mentioned various raw materials will directly affect the pore size distribution and pore structure. , especially when the patent CA1490076A uses coal as a raw material, in order to obtain a suitable particle size, it is necessary to mix coal powder with water and quartz sand into a sand mill for fine processing, which makes the preparation process complicated and the cost of hole adjustment is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The mesocarbon microspheres are sieved to make their average particle size about 15μm, with carboxymethyl cellulose as the binder, and the amount of binder added is the total mass of the mixture (binder + mesocarbon microspheres) 3% of it, add water and mix evenly to make a loose mud, and then directly extrude a wet tubular raw film with an outer diameter of 9mm, an inner diameter of 6mm and a wall thickness of 1.5mm on a plastic extruder at a pressure of 5Mpa, at room temperature Air dry naturally in the air to obtain the original film. Put the original film into a carbonization furnace, under the protection of nitrogen, after raising it from room temperature to 300°C at 1°C / min, then heating it up to 700°C at 3°C / min, and keep the temperature at 700°C for 2 hours. Take it out at room temperature to obtain a tubular carbon membrane. The average outer diameter of the carbon film is 8.00mm and the inner diameter is 5.26mm. Tested by the bubbling (bubble) method, the average ...

Embodiment 2

[0024] The difference between Example 2 and Example 1 is that the final carbonization temperature is 750°C, and the average pore diameter is 0.175 μm.

Embodiment 3

[0026] The difference between Example 3 and Example 1 is that the final carbonization temperature is 800° C., and the average pore diameter is 0.222 μm.

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PUM

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Abstract

The present invention belongs to the field of preparation technology of separation material, and relates to an intermediate phase carbon microsphere basal tube type carbon membrane and its preparation method. Said method includes the following steps: (1), firstly, adopting copolycondensation method, catalytic condensation method or emulsion method to prepare intermediate phase carbon micropheres whose grain size is 5-40 micrometer, then screening according to requirement of subsequent procedure so as to obtain intermediate phase carbon microspheres with different grain size distribution; (2), under the condition of normal temperature placing the intermediate phase carbon microspheres with a certain grain size distribution and binding agent into a mixing device together, and uniformly mixing them, then placing the mixed material into a continuous extrusion forming machine, regulating pressure to obtain tubular raw membrane; and (3), naturally drying said raw membrane by airing, under the condition of inert gas protection or air isolation carbonizing said raw membrane in carbonizing oven so as to obtain the invented product whose average pore size is 0.1-0.3 micrometer.

Description

Technical field [0001] The invention relates to a mesophase carbon microsphere-based tubular carbon membrane and a preparation method thereof, and belongs to the technical field of preparation of separation materials. Background technique [0002] Carbon membrane is a porous inorganic separation membrane, which is made by high-temperature pyrolysis of carbon-containing materials. Compared with traditional organic film, carbon film has light specific gravity, acid and alkali resistance, organic solvent resistance, good heat transfer and electrical conductivity, heat shock resistance, wear resistance, self-lubricity, mechanical processing and biocompatibility. , Large anisotropy, high separation ability and good cleaning state. It has broad application prospects in gas separation and recovery, corrosive solution separation and sewage treatment. [0003] Carbon membranes are classified into three types: flat type, fiber type and tube type according to their shape. Due to the inevita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02
Inventor 张永刚卢明超
Owner 天津佰腾生产力促进中心有限公司
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