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Device and method for treating byproduct high-boiling residue of polycrystalline silicon

A technology for by-product high boilers and polysilicon, applied in chemical instruments and methods, silicon compounds, silicon halide compounds, etc., can solve problems such as the loss of silicon and chlorine elements

Pending Publication Date: 2020-07-07
JIANGSU ZHONGNENG POLYSILICON TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a novel high boiler treatment device and method to solve the loss of silicon and chlorine caused by deactivation of existing homogeneous catalysts

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  • Device and method for treating byproduct high-boiling residue of polycrystalline silicon

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Embodiment Construction

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments without creative changes by those skilled in the art belong to the protection scope of the present invention.

[0025] figure 1 It is a specific embodiment of the present invention. In this embodiment, the catalyst is filled with an amine-based resin catalyst through the upper baffle plate 2 and the lower baffle plate 3 in the cylinder body 1, and the amine-based resin catalyst can be filled through the catalyst filling port 12. And the catalyst discharge port 4 is discharged. The temperature of the control jacket insulation is 90°C, the high boiling point enters the reactor from the bottom inlet 6 through the pipeli...

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Abstract

The invention discloses a device and a method for treating polycrystalline silicon by-product high-boiling residues, and relates to the field of polycrystalline silicon by-product treatment. The invention discloses a device and a method for treating a byproduct high-boiling residue of polycrystalline silicon. According to the method, anhydrous hydrogen chloride and a polysilicon production by-product high-boiling residue react together in a fixed bed reactor, and the anhydrous hydrogen chloride and the high-boiling residue produce monochlorosilane with a low boiling point, so that the polysilicon by-product is converted into a polysilicon production raw material, and thereby the comprehensive utilization of the polysilicon by-product is achieved. The high-boiling residue treatment device and method have the advantages that the filling amount of the amino resin catalyst is large, the amino resin catalyst is convenient to replace, the catalyst is effectively prevented from being heated and carbonized, and the usage amount of the polysilicon byproduct high-boiling residue catalyst is reduced.

Description

technical field [0001] The invention relates to the technical field of polysilicon preparation, in particular to the treatment of by-products of polysilicon. Background technique [0002] Polysilicon is the main raw material for manufacturing photovoltaic solar cells and other products. Among the methods for manufacturing high-purity polysilicon, the improved Siemens method is currently the mainstream polysilicon production method. In the improved Siemens method, trichlorosilane and hydrogen react in a reduction furnace. The silicon in the trichlorosilane is reduced and deposited on the surface of the silicon core to form polysilicon rods with a diameter of 120-200mm. After a certain temperature, it is replaced with nitrogen, and the polysilicon rods are taken out of the reduction furnace. The polysilicon rods taken out of the reduction furnace are broken into lumps, packed and transported to the downstream of the photovoltaic industry chain for use. [0003] Early polysili...

Claims

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Application Information

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IPC IPC(8): C01B33/107
CPCC01B33/1071
Inventor 付绪光李力刘逸枫沈峰陈其国
Owner JIANGSU ZHONGNENG POLYSILICON TECH DEV
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