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Purification process for phosphorus pentoxide

A technology of phosphorus pentoxide and process is applied in the field of purification of phosphorus pentoxide, which can solve the problems of long purification process, incomplete filtration and impurity removal, and many yellow phosphorus raw materials, so as to reduce energy consumption and improve energy utilization rate. , the effect of preventing waste

Active Publication Date: 2019-09-10
贵州新东浩化工材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology loses a lot of yellow phosphorus raw materials, and the filtration and separation devices used are mostly microporous filtration devices, and the filtration and removal of impurities are not thorough. At the same time, the method of removing arsenic is easy to introduce other impurities, resulting in too long purification process.

Method used

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  • Purification process for phosphorus pentoxide
  • Purification process for phosphorus pentoxide

Examples

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Effect test

Embodiment 1

[0029] The purification process of phosphorus pentoxide comprises the following steps:

[0030] a) Raw material processing: select industrial yellow phosphorus, isolate air heating to melt it into liquid yellow phosphorus, and pass such as figure 1 The shown interior is surrounded by an inorganic ceramic membrane pipeline 1 with a plurality of insulation tubes 2 to separate and remove insoluble impurities such as silicon;

[0031] b) primary combustion: the air is processed through 5A molecular sieves, then dried and filtered, and the air humidity is controlled to be 8ppm; the separated liquid yellow phosphorus described in step a) is placed in the reactor, and the liquid yellow phosphorus is passed into The treated air is controlled at an air flow rate of 450ml / min, and burned on the surface of liquid yellow phosphorus to generate crude phosphorus pentoxide gas;

[0032] c) primary cooling: pass the crude phosphorus pentoxide gas described in step b) through a 30°C liquid co...

Embodiment 2

[0037] The purification process of phosphorus pentoxide comprises the following steps:

[0038] a) Raw material treatment: select industrial yellow phosphorus, heat it in isolation from the air to melt it into liquid yellow phosphorus, and separate and remove insoluble impurities such as silicon through the inorganic ceramic membrane channel 1 without multiple insulation tubes 2;

[0039] b) primary combustion: the air is processed through 5A molecular sieves, then dried and filtered, and the air humidity is controlled to be 8ppm; the separated liquid yellow phosphorus described in step a) is placed in the reactor, and the liquid yellow phosphorus is passed into The treated air is controlled at an air flow rate of 450ml / min, and burned on the surface of liquid yellow phosphorus to generate crude phosphorus pentoxide gas;

[0040] c) primary cooling: pass the crude phosphorus pentoxide gas described in step b) through a 30°C liquid cooler to cool the phosphorus pentoxide into a...

Embodiment 3

[0045] The purification process of phosphorus pentoxide comprises the following steps:

[0046] a) Raw material processing: select industrial yellow phosphorus, isolate air heating to melt it into liquid yellow phosphorus, and pass such as figure 1 The shown interior is surrounded by an inorganic ceramic membrane channel 1 with a plurality of insulation tubes 2 to separate and remove insoluble impurities such as silicon;

[0047] b) primary combustion: the air is processed through 5A molecular sieves, then dried and filtered, and the air humidity is controlled to be 8ppm; the separated liquid yellow phosphorus described in step a) is placed in the reactor, and the liquid yellow phosphorus is passed into The treated air is controlled at an air flow rate of 470ml / min, and is burned on the surface of liquid yellow phosphorus to generate crude phosphorus pentoxide gas;

[0048] c) primary cooling: pass the crude phosphorus pentoxide gas described in step b) through a 30°C liquid ...

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Abstract

The invention discloses a purification process for phosphorus pentoxide. The purification process comprises the following steps: raw material treatment, primary combustion, primary cooling, secondarycombustion, separation and purification, and secondary cooling. The purification process provided by the invention has the following beneficial effects: by adoption of multi-stage combustion, the waste of a yellow phosphorus raw material is prevented; by adoption of an inorganic ceramic membrane pipeline internally equipped with a heat-preserving pipe, molten yellow phosphorus and phosphorus pentoxide gas are separated and purified; by utilization of a metal oxide material of the inorganic ceramic membrane pipeline, acidic substances of the phosphorus pentoxide are removed; through a 5A molecular sieve for air treatment, primary combustion of the yellow phosphorus and secondary combustion of the phosphorus pentoxide are completely performed, so separation and purification are convenient; the temperature of secondary combustion is controlled, so two kinds of impurities in the phosphorus pentoxide are removed; and heat generated by heat exchange of primary cooling and secondary cooling is used as heat-preserving heat of the heat-preserving pipe, so the utilization rate of energy is improved.

Description

technical field [0001] The invention relates to the field of purification of phosphorus pentoxide, in particular to a purification process of phosphorus pentoxide. Background technique [0002] Phosphorus pentoxide is a relatively mature phosphorus chemical product in domestic and foreign markets. It is an intermediate product of phosphorus chemical industry directly produced from yellow phosphorus, and is the basic raw material for the production of fine chemical products. The domestic production of phosphorus pentoxide is mainly concentrated in the economically developed areas in eastern China. At present, the production capacity of a single combustion reactor for phosphorus pentoxide in my country is generally 100-200 tons per year. The production capacity of the device is generally 5,000-10,000 tons / year; the quality of phosphorus pentoxide products is the key technology for its production control. Limited by the technical level of equipment, only a few domestic enterpris...

Claims

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Application Information

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IPC IPC(8): C01B25/12
CPCC01B25/12C01P2006/80
Inventor 罗建洪舒爱桦
Owner 贵州新东浩化工材料科技有限公司
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