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Granulation device, method for preparing catalyst for catalytic hydrogenation of silicon tetrachloride, and method for catalytic hydrogenation of silicon tetrachloride

A technology for catalytic hydrogenation reaction, silicon tetrachloride, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, halide silicon compounds, etc., can solve the loss of catalytic activity of silicon-copper alloy catalysts, etc. problem, to achieve the effect of uniform size, high yield and avoiding oxidation

Active Publication Date: 2017-11-10
新疆硅基新材料创新中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive cuprous chloride will reduce the silicon-copper alloy to metallic copper and deposit on the surface of the active point, resulting in the loss of the catalytic activity of the silicon-copper alloy catalyst

Method used

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  • Granulation device, method for preparing catalyst for catalytic hydrogenation of silicon tetrachloride, and method for catalytic hydrogenation of silicon tetrachloride
  • Granulation device, method for preparing catalyst for catalytic hydrogenation of silicon tetrachloride, and method for catalytic hydrogenation of silicon tetrachloride
  • Granulation device, method for preparing catalyst for catalytic hydrogenation of silicon tetrachloride, and method for catalytic hydrogenation of silicon tetrachloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Such as figure 1 , 2 As shown, a granulation device in this embodiment includes a melting tank, a casting pan 1, a cooling box 2, and an oscillating mechanism 3. The oscillating mechanism 3 is arranged on the casting pan 1, and the raw material Melted into a molten liquid and poured into the pouring pan 1, the oscillation mechanism 3 is used to make the pouring pan 1 vibrate, and then the molten liquid in the pouring pan 1 is dropped into the cooling box 2 Particles were obtained in the coolant 5.

[0054] Preferably, the oscillating mechanism 3 is an intermediate frequency oscillator, and the frequency of the intermediate frequency oscillator is 50-200 Hz.

[0055] Such as image 3 , 4 As shown, preferably, the casting tray 1 is provided with a liquid outlet 4 with a diameter of D, and the height from the liquid outlet 4 to the cooling liquid 5 in the cooling box 2 is H, wherein, H / D is 7-70.

[0056] Such as image 3 , 4 As shown, preferably, the casting tray...

Embodiment 2

[0071] This embodiment provides a method for preparing a copper-silicon alloy catalyst containing Cu-Si metal bonds for the catalytic hydrogenation of silicon tetrachloride using the granulation device in Example 1, comprising the following steps:

[0072] (1) The raw material is melted into a molten liquid through a melting tank and poured into a casting pan, and then the casting pan is vibrated by an oscillating mechanism so that the molten liquid in the casting pan drops into the cooling liquid in the cooling box to obtain Granular alloy, wherein the molten liquid includes: Si: 15wt%, the rest is copper;

[0073] (2) Vacuum annealing the granular alloy at 760° C. for 18 hours to obtain a copper-silicon alloy catalyst containing Cu-Si metal bonds for catalytic hydrogenation of silicon tetrachloride.

[0074] By using the granulation device in Example 1 to prepare the catalyst obtained by the preparation method of the catalyst for the catalytic hydrogenation of silicon tetrac...

Embodiment 3

[0079] This embodiment provides a method for preparing a copper-silicon alloy catalyst containing Cu-Si metal bonds for the catalytic hydrogenation of silicon tetrachloride using the granulation device in Example 1, comprising the following steps:

[0080] (1) The raw material is melted into a molten liquid through a melting tank and poured into a casting pan, and then the casting pan is vibrated by an oscillating mechanism so that the molten liquid in the casting pan drops into the cooling liquid in the cooling box to obtain Granular alloy, wherein the molten liquid includes: Si: 15.5wt%, the rest is copper;

[0081] (2) Vacuum annealing the granular alloy at 700° C. for 24 hours to obtain a copper-silicon alloy catalyst containing Cu-Si metal bonds for catalytic hydrogenation of silicon tetrachloride.

[0082] This embodiment also provides a method for catalytic hydrogenation of silicon tetrachloride, comprising the following steps:

[0083] (1) Pass hydrogen into the fluid...

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Abstract

The invention discloses a granulation device, a preparation method for preparing a catalyst for catalytic hydrogenation of silicon tetrachloride and a method for catalytic hydrogenation of silicon tetrachloride. The granulation device includes a melting tank, a casting tray, a cooling box, and an oscillation The oscillating mechanism is set on the casting tray, the raw material is melted into molten liquid through the melting tank and poured into the casting tray, the oscillation mechanism is used to make the casting tray vibrate, and then the molten liquid in the casting tray is dropped into the cooling box in the coolant. The granulation device in the present invention can make the molten liquid in the casting pan fall into the cooling liquid in the cooling box in the form of uniform particles through the oscillation of the oscillating mechanism arranged on the casting pan. The granulation of the present invention is granular, not only Only the size is uniform, and the specific surface area is greatly increased. The catalyst obtained by the preparation method of the invention avoids the microcohesive effect of the catalyst, can maintain the active point in the catalytic state for a long time, and greatly increases the catalytic life of the catalyst.

Description

technical field [0001] The invention belongs to the technical field of producing trichlorosilane from silicon tetrachloride, and specifically relates to a granulation device, a method for preparing a catalyst for catalytic hydrogenation of silicon tetrachloride and a method for catalytic hydrogenation of silicon tetrachloride. Background technique [0002] Polysilicon is the basic material of the solar photovoltaic industry. 75-80% of polysilicon in the world is produced by the improved Siemens method. There will be about 16 tons of by-product silicon tetrachloride generated. [0003] At present, the cold hydrogenation process of silicon tetrachloride (STC) used by domestic polysilicon manufacturers is carried out in a fluidized bed reactor, because the reaction conditions of monovalent copper and silicon and / or hydrogen are milder than divalent copper, and the reaction temperature is lower , so a monovalent CuCl was chosen as the catalyst. Absolutely dry CuCl is a white p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J2/06B01J2/18B01J23/72B01J35/02C01B33/107
Inventor 郭增昌刘兴平吕学谦刘乐通
Owner 新疆硅基新材料创新中心有限公司