Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing high purity yellow phosphrus

A production method, yellow phosphorus technology, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve problems such as explosion, fire, technical difficulty in industrialization, and safety issues

Inactive Publication Date: 2004-09-29
KUNYANG PHOSPHATE FERTILIZER PLANT YUNNAN PROV
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are following deficiencies in each of the above-mentioned methods: (1) explosions, fires, etc. are prone to occur in the implementation process, and there are safety problems in various degrees, and the developed technology is difficult to industrialize; (2) only one method is used to produce high-purity yellow phosphorus It is impossible to obtain a qualified product by combining more than two methods, but this has not been seriously studied; (3) there is no method that can economically produce refined yellow phosphorus of different quality levels

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: take by weighing the industrial yellow phosphorus that 2kg vacuum distillation obtains, put into a reactor with bottom valve, jacket and stirrer with a certain amount of water, feed high-purity nitrogen, empty the water in the reactor , use 80°C hot water to heat the yellow phosphorus in the reactor from the jacket to melt, and remove a small amount of water dissolved in the yellow phosphorus, add 300kg of concentrated sulfuric acid with a concentration of 105% after stirring, and then reduce the temperature of the hot water to Lower the temperature to 60°C to 70°C, and the reaction time is 0.5 hours. After stopping the stirring for 5 minutes, let off all the sulfuric acid in the reactor from the bottom valve. After starting stirring, slowly add 15kg to 20kg of water from the upper part of the reactor (stop nitrogen after adding 2kg of water), and wash to remove residual sulfuric acid.

[0016] Transfer the above-mentioned treated yellow phosphorus to a re...

Embodiment 2

[0018] Embodiment 2: take by weighing the industrial yellow phosphorus that 2kg vacuum distillation obtains, put into a reactor with bottom valve, jacket and agitator with a certain amount of water, feed high-purity nitrogen, and empty the water in the reactor , use 80°C hot water to heat the yellow phosphorus in the reactor from the jacket to melt, and remove a small amount of water dissolved in the yellow phosphorus, add 300kg of concentrated sulfuric acid with a concentration of 98% after stirring, and then reduce the temperature of the hot water to Lower the temperature to 60°C to 70°C, and the reaction time is 0.5 hours. After stopping the stirring for 5 minutes, let off all the sulfuric acid in the reactor from the bottom valve. After starting stirring, slowly add 15kg to 20kg of water from the upper part of the reactor (stop nitrogen after adding 2kg of water), and wash to remove residual sulfuric acid.

[0019] Transfer the above-mentioned treated yellow phosphorus to ...

Embodiment 3

[0021] Embodiment 3: take by weighing the industrial yellow phosphorus that 2kg vacuum distillation obtains, put into a reactor with bottom valve, jacket and agitator with a certain amount of water, feed high-purity nitrogen, empty the water in the reactor , use 80°C hot water to heat the yellow phosphorus in the reactor from the jacket to melt, and remove a small amount of water dissolved in the yellow phosphorus, add 300kg of concentrated sulfuric acid with a concentration of 120% after stirring, and then reduce the temperature of the hot water to Lower the temperature to 60°C to 70°C, and the reaction time is 0.5 hours. After stopping the stirring for 5 minutes, let off all the sulfuric acid in the reactor from the bottom valve. After starting stirring, slowly add 15kg to 20kg of water from the upper part of the reactor (stop nitrogen after adding 2kg of water), and wash to remove residual sulfuric acid.

[0022] Transfer the above-mentioned treated yellow phosphorus to a r...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to method of producing high purity yellow phosphorus. The production includes the following steps: decompression distilling industrial yellow phosphorus to eliminate mechanical impurity; reaction with concentrated sulfuric acid in condition of isolating air and washing with distilled water to eliminate residual sulfuric acid; reaction with HNO3 and oxidation reinforcer through stirring, washing with water solution of oxidant without pollution to phosphorus and washing with distilled water; and filtering with 2-5 micron filter to obtain yellow phosphorus in purity of 99.99-99.99999%. The said process has high product purity, operation safety and low cost and is suitable for use in industrial production.

Description

technical field [0001] The invention belongs to a production method of yellow phosphorus, in particular to a production method of high-purity yellow phosphorus. technical background [0002] At present, there are more than 20 technical routes for yellow phosphorus purification at home and abroad, which can be divided into three categories: physical methods, chemical methods and other methods. [0003] Physical methods include distillation, adsorption, ion exchange, extraction, etc. Distillation and extraction are commonly used. However, due to the similar behavior of phosphorus and arsenic, it is difficult to achieve a high removal rate; yellow phosphorus contains inorganic impurities, which can be separated by adsorption methods. The effect is poor; the security of the ion exchange method is poor, the cost is also high, and it is difficult to realize industrialization. [0004] The chemical method is to add inorganic acid, alkali, etc. to liquid phosphorus to make impuriti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/047
Inventor 马兴良吴建军骆彪章丽芳李红高红梅
Owner KUNYANG PHOSPHATE FERTILIZER PLANT YUNNAN PROV