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Automatic solvent replacing apparatus in preparation process of hydrophobic silicon dioxide aerogel

A technology of silica and solvent replacement, applied in inorganic chemistry, silicon compounds, chemical instruments and methods, etc., can solve the problems of long time consumption, repeated solvent replacement, and the solvent loss rate cannot be minimized, and achieves low solvent loss, Simple preparation process

Active Publication Date: 2018-03-30
WUHAN UNIV OF TECH
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Problems solved by technology

Disadvantages of this method cannot determine the displacement end point, and the solvent loss rate cannot be minimized
[0006] Aiming at the problems of repeated solvent replacement and long time-consuming in the process of preparing hydrophobic silica airgel, the present invention provides a device for automatically replacing solvent during the preparation process, which can realize automatic solvent replacement, and the solvent can be recycled It can also realize automatic discharge, saving time and effort

Method used

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  • Automatic solvent replacing apparatus in preparation process of hydrophobic silicon dioxide aerogel
  • Automatic solvent replacing apparatus in preparation process of hydrophobic silicon dioxide aerogel

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Embodiment 1

[0031] Such as figure 1 This embodiment is a schematic diagram of the device for automatically replacing the solvent during the preparation process of the hydrophobic silica aerogel. The device includes a cylindrical reactor with a condenser 1 installed on the cylindrical reactor. The cylindrical reactor is divided into upper and lower layers. The upper layer is used for displacement reaction, the lower layer is used to place the recovered solvent, and the upper and lower layers are used for condensation. The recirculation pipe 6 and the steam pipe 3 form a circulation loop between the devices 1;

[0032] The reflux pipe 6 is a bent pipe with a siphon effect. It is installed at the bottom of the upper layer of the reactor and the top of the lower layer to connect the bottom of the upper layer and the lower layer. When the solvent of the displacement reaction reaches the top of the reflux pipe, the liquid in the upper layer of the reactor will automatically flow to the reaction. I...

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Abstract

The invention relates to an automatic solvent replacing apparatus in a preparation process of hydrophobic silicon dioxide aerogel. The apparatus comprises a cylindrical reactor, wherein the cylindrical reactor is provided with a condenser (1), the cylindrical reactor is divided into an upper layer and a lower layer, the upper layer is used for the replacement reaction, the lower layer is used forstoring the recycled solvent, and the upper layer, the lower layer and the condenser (1) form a circulating loop by virtue of a reflux pipe (6) and a steam pipe (3). The invention provides the automatic solvent replacing apparatus in the preparation process for the weaknesses in the preparation process of the hydrophobic silicon dioxide aerogel that the solvent is repeatedly replaced, long time isconsumed and the like. By utilizing the apparatus, the solvent can be automatically replaced; and moreover, the solvent can be circularly utilized, materials can be automatically discharged, and timeand labor can be saved.

Description

Technical field [0001] The invention relates to a device for automatically replacing a solvent in the preparation process of hydrophobic silica aerogel, and a method for preparing hydrophobic silica aerogel by using the device. Background technique [0002] Aerogel is an advanced ultra-low density material. Depending on the type of nanostructure and starting material, its porosity is 90% or higher, and its specific surface area is hundreds of m 2 / g to 1500m 2 / g. Nanoporous aerogels can be used in applications such as ultra-low dielectric materials, catalysts, electrode materials, and sound insulation materials. In particular, silica aerogels with low thermal conductivity can be used in refrigerators, automobiles, airplanes and other applications. In application. [0003] The silica wet gel obtained by the polycondensation of silica sol is mainly filled with water in the network pores. Because the surface tension of water is very large (72dyn / cm), the additional pressure of the c...

Claims

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Application Information

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IPC IPC(8): C01B33/158C01B33/152
CPCC01B33/152C01B33/1585
Inventor 黄健张爱满
Owner WUHAN UNIV OF TECH
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