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Production method of high-purity yellow phosphorus

A production method and technology for pure yellow phosphorus, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of unsafe equipment corrosion of high-purity phosphoric acid, high product impurity content, high cost and uneconomical, etc. Safe operation, quick effect, small investment effect

Active Publication Date: 2010-06-30
湖北兴福电子材料股份有限公司
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Problems solved by technology

At present, there are many methods for producing high-purity yellow phosphorus. There are chemical and physical methods for producing high-purity yellow phosphorus. These methods have their own advantages and disadvantages. The production of high-purity phosphoric acid by chemical and physical methods is unsafe and corrosive to equipment, and the cost is high. Economical, high risk of production with concentrated sulfuric acid or concentrated nitric acid, high impurity content in products produced by decompression method, there is no satisfactory treatment method yet

Method used

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Embodiment Construction

[0012] Purge the filter with nitrogen to create an inert environment, seal it with water, then fill the diatomite storage tank with hot water, maintain the hot water circulation between the diatomite storage tank and the filter for 20 to 30 minutes, and pre-heat the filter. After heating to 60-80°C, add 60-80°C hot water to the upper level. Add diatomite with 0.15-0.28% of the weight of industrial yellow phosphorus in the diatomite suspension, and after stirring for 30 minutes, use a pump to circulate the diatomite suspension between the diatomite suspension tank and the filter for 50-60 Minutes, the diatomaceous earth is attached to the filter tube of the filter, ready for the filtration of yellow phosphorus. At the same time, first put the liquid industrial yellow phosphorus into the jacketed insulation pot with hot water, and add powdered activated carbon with a weight of 0.5-1.0% of the industrial yellow phosphorus. After stirring for 100-120 minutes, pump it into the Dia...

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Abstract

The invention discloses a production method of high-purity yellow phosphorus, which relates to a yellow phosphorus production method. The high-purity yellow phosphorus is obtained through the process steps of mixing, diatomite pre-applying, diatomite pre-applying, filtration, acid washing and water washing. The invention has the advantages of simple equipment, low investment, fast effect taking, high yellow phosphorus recovery rate (which reaches more than 99 percent), high product purity (which can reaches 5 to 6 N stages), simple process, convenient operation and safety, and is favorable for industrialization.

Description

technical field [0001] The invention relates to a method for producing yellow phosphorus, in particular to a method for producing high-purity yellow phosphorus. Background technique [0002] Yellow phosphorus is a very important basic industrial raw material in the phosphorus chemical industry, mainly used in many fields such as chemical industry and pesticide. At present, there are many methods for producing high-purity yellow phosphorus. There are chemical and physical methods to produce high-purity yellow phosphorus. These methods have their own advantages and disadvantages. The chemical and physical methods are unsafe to produce high-purity phosphoric acid and cause great corrosion to equipment, and the cost is high. Economical, it is dangerous to produce with concentrated sulfuric acid or concentrated nitric acid, and the product produced by the decompression method has high impurity content, and there is not yet a satisfactory treatment method. For a long time, the pr...

Claims

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Application Information

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IPC IPC(8): C01B25/027
Inventor 李国璋李少平苗刚欧阳克银
Owner 湖北兴福电子材料股份有限公司
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