Ultra-pure white phosphorus ordinary-pressure conversion method

Abstract

The invention discloses an ultra-pure white phosphorus ordinary-pressure conversion method. Ultra-pure white phosphorus with the purity of 6N is produced, the produced white phosphorus with the purity of 6N is subjected to ordinary-pressure conversion to obtain red phosphorus, and then after drying, final products are obtained. Conversion adopts modes of cooling pressure reduction and tail gas pressure removal and also gradual temperature rise according to gradients. High-pure red phosphorus obtained through conversion with the method has stable quality and high purity and acceptability. Conversion rate is stabilized at more than 90%. The ultra-pure white phosphorus ordinary-pressure conversion method is safe in operation, low in energy consumption and cost and small in labor intensity, effectively prevents explosion from happening during ultra-pure phosphorus conversion, ensures production safety, is in the low-carbon environment during a production process, and lays the foundation for producing ultra-pure phosphorus in a large scale.

Description

technical field [0001] The invention relates to an atmospheric pressure conversion method of ultra-pure white phosphorus. Background technique [0002] At present, foreign ultra-pure phosphorus manufacturers, such as American Moach Industries, Mitsubishi Metals, Lassa Industries, Furukawa Mining Company III (Japan), Smelting and Refining Company (ASARCO USA), Mining and Product Chemicals Corporation (CMP UK) and other companies High-pressure conversion of white phosphorus is commonly used. [0003] The disadvantages of high pressure conversion are as follows: [0004] (1) The price of the high-pressure reformer is more than one million yuan, the cost is quite high, and the maintenance cost is high. Once a problem occurs, it will affect the quality of subsequent conversion; [0005] ⑵The high-pressure reformer is converted at a pressure of 4MPa and a specific temperature, so the high-pressure furnace has to bear certain risks. If there are weak factors such as corrosion in...

AI Technical Summary

Problems solved by technology

[0004] (1) The price of the high-pressure reformer is more than one million yuan, the cost is quite high, and the maintenance cost is high. Once a problem occurs, it will affect the quality of subsequent conversion;

[0005] ⑵The high-pressure reformer transforms at a pressure of 4MPa and a specific temperature, so the high-pressure reformer has to bear certain risks. If there are weak factors such as corrosion in any part, it will pose a huge threat to the entire safe production

[0011] (4) The conversion amount of a single tube is small, and to achieve large-scale, it is necessary to increase equipment;

[0012] ⑸Human factors account for a large proportion, and the requirements for digitalization are not as high as those for high-voltage conversion