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Yellow-phosphorus purification technology

A yellow phosphorus and process technology, applied in the field of yellow phosphorus purification process, can solve the problems affecting the application positions and economic added value of yellow phosphorus, low phosphorus recovery rate, limited purification effect, etc., and achieve high dearsenic and iron removal rates. , The effect of excellent phosphorus recovery rate and safe operation

Active Publication Date: 2019-04-12
中州新材料(杭州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, yellow phosphorus contains inorganic impurities, organic impurities and mechanical impurities, which seriously affect the application positions and economic added value of yellow phosphorus. The chemical and physical methods that have been reported in the prior art to remove impurities in yellow phosphorus face a low phosphorus recovery rate. , limited purification effect, etc.

Method used

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Examples

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Embodiment 1

[0047] A purification process for yellow phosphorus, comprising the following steps:

[0048] Ⅰ Put industrial yellow phosphorus and 10% hydrogen peroxide into the reactor with heating and stirring, the mass ratio of hydrogen peroxide and yellow phosphorus is 5:1, raise the temperature to 50℃ at 2℃ / min, under the protection of high-purity nitrogen , at 50°C and 300 rpm for 4 hours; naturally cool down to 25°C, release the hydrogen peroxide to separate the yellow phosphorus, and wash with hot water at 70°C that is 4 times its weight;

[0049] Ⅱ Add the yellow phosphorus and the arsenic-removing adsorbent washed in step I into the reactor with heating and stirring. The amount of the arsenic-removing adsorbent is 0.1% of the mass of the yellow phosphorus, and the temperature is raised to 50°C at 2°C / min, and the temperature is increased at 600 rpm. / minute stirring and reacting for 1 hour, the yellow phosphorus is separated, and washed with hot water at 70°C that is 4 times its ...

Embodiment 2

[0062] A purification process for yellow phosphorus, comprising the following steps:

[0063] Ⅰ Put industrial yellow phosphorus and 10% hydrogen peroxide into the reactor with heating and stirring, the mass ratio of hydrogen peroxide and yellow phosphorus is 5:1, raise the temperature to 50℃ at 2℃ / min, under the protection of high-purity nitrogen , at 50°C and 300 rpm for 4 hours; naturally cool down to 25°C, release the hydrogen peroxide to separate the yellow phosphorus, and wash with hot water at 70°C that is 4 times its weight;

[0064] Ⅱ Add the yellow phosphorus and the arsenic-removing adsorbent washed in step I into the reactor with heating and stirring. The amount of the arsenic-removing adsorbent is 0.1% of the mass of the yellow phosphorus, and the temperature is raised to 50°C at 2°C / min, and the temperature is increased at 600 rpm. / minute stirring and reacting for 1 hour, the yellow phosphorus is separated, and washed with hot water at 70°C that is 4 times its ...

Embodiment 3

[0075] A purification process for yellow phosphorus, comprising the following steps:

[0076] Ⅰ Put industrial yellow phosphorus and 10% hydrogen peroxide into the reactor with heating and stirring, the mass ratio of hydrogen peroxide and yellow phosphorus is 5:1, raise the temperature to 50℃ at 2℃ / min, under the protection of high-purity nitrogen , at 50°C and 300 rpm for 4 hours; naturally cool down to 25°C, release the hydrogen peroxide to separate the yellow phosphorus, and wash with hot water at 70°C that is 4 times its weight;

[0077] Ⅱ Add the yellow phosphorus and the arsenic-removing adsorbent washed in step I into the reactor with heating and stirring. The amount of the arsenic-removing adsorbent is 0.1% of the mass of the yellow phosphorus, and the temperature is raised to 50°C at 2°C / min, and the temperature is increased at 600 rpm. / minute stirring and reacting for 1 hour, the yellow phosphorus is separated, and washed with hot water at 70°C that is 4 times its ...

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Abstract

The invention discloses a yellow-phosphorus purification technology. The yellow-phosphorus purification technology includes the following steps that I yellow phosphorus and hydrogen peroxide are heated and stirred, and the yellow phosphorus is separated and washed; II the yellow phosphorus after being washed in the step I and an arsenic-removing adsorbent are heated and stirred, and the yellow phosphorus is separated and washed; III the yellow phosphorus after being washed in the step II is added into an oxidation reinforcing agent and nitric acid, heating and stirring are carried out, and theyellow phosphorus is separated and washed; IV the yellow phosphorus after being washed in the step III and an iron-removing adsorbent are heated and stirred, and the yellow phosphorus is separated and washed. The yellow-phosphorus purification technology is simple in process, safe in operation, high in arsenic-removing rate and iron-removing rate and excellent in phosphorus recovery rate, and industrial amplification is easy to achieve.

Description

technical field [0001] The invention relates to a process for purifying yellow phosphorus. Background technique [0002] Yellow phosphorus is an important basic industrial raw material. With the expansion of application fields and varieties of some important phosphides (important intermediates in phosphorus chemical industry), especially high-quality phosphorus chemicals, the market has put forward new requirements for the quality of yellow phosphorus products. Therefore, a lot of research has been done on the purification method of yellow phosphorus at home and abroad. However, due to the special properties of yellow phosphorus itself, considering safety, economy, reaction conditions and processes, industrial yellow phosphorus purification technology is relatively difficult, and many purification methods have not yet been industrialized. [0003] Due to factors such as raw materials, motors, and electric furnace thermal conditions, yellow phosphorus products are inevitably...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/047
CPCC01B25/047
Inventor 陈文标
Owner 中州新材料(杭州)有限公司
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