Apparatus and method for producing high-purity yellow phosphorus

Abstract

The invention discloses an apparatus and a method for producing high-purity yellow phosphorus. The method comprises: adding a yellow phosphorus solution into a crystallizer, then adding industrial yellow phosphorus, adjusting the flow of a crystallizing-device cooling liquid in a heat-insulation layer to control the crystallization temperature and further to crystallize yellow phosphorus; discharging the crystallization mother liquor into a solution regenerated system, adding a crystal washing liquid into a crystallization tank, after washing, discharging the washing liquid into a washing-liquid regenerated system, and sending yellow phosphorus into an extraction tank; adding an extraction agent to extract yellow phosphorus, discharging extracted yellow phosphorus into a phosphorus pressing tank; adjusting the material temperature in the phosphorus pressing tank by adjusting hot water flow in a jacket of the phosphorus pressing tank, so as to enable yellow phosphorus to be a liquid; and pressing yellow phosphorus in the phosphorus pressing tank into a filter for filtering, and enabling filtered yellow phosphorus to enter a finished product storage system. According to the technical scheme, yellow phosphorus is purified by employing crystallization, extraction and filtering, so that the purity of phosphorus is improved and the quality of yellow phosphorus is not influenced.

Description

technical field [0001] The invention relates to a yellow phosphorus production device, in particular to a high-purity yellow phosphorus production device. Background technique [0002] In addition to arsenic, industrial yellow phosphorus also contains mechanical impurities, inorganic impurities and organic matter. These impurities mainly include: [0003] Metal elements: Ca, Fe, Al, Mg, Sr, Mn, Na, K, Ti, V, Cr, Ni, Ga, Cd, Cu, Sb, Pb, Zn, Sn, U. [0004] Semi-metal elements: Se, Si, C, B, As, Bi. [0005] Organic matter: more than 30 kinds of phenol, anthracene, tar and polyatomic polycyclic aromatic hydrocarbons. [0006] Because industrial yellow phosphorus contains the above-mentioned impurities, it seriously affects its application range, and high-purity phosphorus chemical products are widely used. Taking high-purity phosphorus as an example, InP and GaP are important raw materials in the electronics industry, and are doped in planar epitaxial transistors and integ...

AI Technical Summary

Problems solved by technology

However, due to the complexity of yellow phosphorus impurities, the reported chemical and physical methods to remove arsenic in yellow phosphorus are facing problems such as low phosphorus recovery rate and limited purification effect.

[0008] The impurity composition of industrial yellow phosphorus is very complex. It is difficult to achieve ideal and economical results by using a single method. Therefore, multiple purification methods must be used to couple

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