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Production process of high-purity phosphorus pentoxide

A technology of phosphorus pentoxide and production process, which is applied in the field of large-scale production of high-purity phosphorus pentoxide, can solve the problems of incomplete cold precipitation of phosphorus pentoxide, low burning intensity of yellow phosphorus, unstable product quality, etc. The effect of large production capacity, good product quality and extensive promotion value

Active Publication Date: 2014-02-05
YUNNAN CHEM RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low burning intensity of yellow phosphorus in the traditional production process of phosphorus pentoxide, non-recovery of reaction heat, incomplete cold analysis of phosphorus pentoxide, unstable product quality, difficult production control, etc., to provide a production capacity , good process stability, high product purity, low investment, high-purity phosphorus pentoxide production process that meets energy-saving, environmental protection, and clean low-carbon production requirements

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  • Production process of high-purity phosphorus pentoxide
  • Production process of high-purity phosphorus pentoxide

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: The amount of phosphorus input is 150 kg / hour.

[0030] Industrial yellow phosphorus is heated and melted at 70-80°C, and mixed and washed with the pre-configured sulfur-containing compound alkaline solution at a volume ratio of 1:2. The concentration of the sulfur-containing compound alkaline solution is 5% sodium hydroxide, The sodium sulfide content is 5%, and the liquid yellow phosphorus after alkali washing is rinsed with deionized water, and filtered through a microfilter to obtain refined and refined liquid yellow phosphorus. According to yellow phosphorus (P 4 ) and oxygen (O 2 ) molar ratio is 2.0, yellow phosphorus oxidation and combustion reaction temperature is 750-900°C, phosphorus injection combustion intensity is 150 kg / hour, and the cooling soft water flow rate controlled by the intermittent cold analysis device for forced cold analysis is 120 meters 3 / hour, 295 tons of high-purity phosphorus pentoxide can be obtained per hour, and the ...

Embodiment 2

[0031] Embodiment 2: The amount of phosphorus input is 550 kg / hour.

[0032] Industrial yellow phosphorus is heated and melted at 70-80°C, and mixed and washed with the pre-configured alkaline solution of sulfur-containing compounds at a volume ratio of 1:3. The concentration of the alkaline solution of sulfur-containing compounds is 6% sodium hydroxide, The sodium sulfide content is 3%, and the liquid yellow phosphorus after alkali washing is rinsed with deionized water, and filtered through a microfilter to obtain refined and refined liquid yellow phosphorus. According to yellow phosphorus (P 4 ) and oxygen (O 2 ) molar ratio is 1.6, yellow phosphorus oxidative combustion reaction temperature is 800-900°C, phosphorus injection combustion intensity is 550 kg / hour, and the cooling soft water flow rate controlled by the intermittent cold analysis device for forced cold analysis is 390 meters 3 / hour, 1.08 tons of high-purity phosphorus pentoxide can be obtained per hour, and...

Embodiment 3

[0033] Embodiment 3: The amount of phosphorus input is 1500 kg / hour.

[0034] Industrial yellow phosphorus is heated and melted at 70-80°C, and mixed and washed with the pre-configured alkaline solution of sulfur-containing compounds at a volume ratio of 1:2.5. The concentration of the alkaline solution of sulfur-containing compounds is 8% sodium hydroxide, The sodium sulfide content is 3%, and the liquid yellow phosphorus after alkali washing is rinsed with deionized water, and filtered through a microfilter to obtain refined and refined liquid yellow phosphorus. According to yellow phosphorus (P 4 ) and oxygen (O 2 ) molar ratio is 2.25, yellow phosphorus oxidation combustion reaction temperature is 600 ~ 800 ℃, phosphorus injection combustion intensity is 1500 kg / hour, and the cooling soft water flow rate controlled by intermittent cold analysis device for forced cold analysis is 1100 meters 3 / hour, 2.94 tons of high-purity phosphorus pentoxide product can be obtained pe...

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Abstract

The invention provides a production process of high-purity phosphorus pentoxide. The production process comprises the following steps of: carrying out alkaline-washing, water-washing and micro-filtering in sequence after heating and melting industrial yellow phosphor; carrying out high-strength phosphor-spraying combustion on obtained refined liquid yellow phosphor in a combustion furnace to obtain a phosphorus pentoxide gasified product; and obtaining the high-purity phosphorus pentoxide product by forcibly cooling and separating the phosphorus pentoxide gasified product, meanwhile, recycling reaction heat. The technical problem for large-scale production of the phosphorus pentoxide is solved systematically by the production process; and the provided high-purity phosphorus pentoxide which is large in production capacity of the production process, stable in process, good in product quality, investment-saving, satisfies energy-saving, environment-friendly and clean low-carbon production needs, has extensive popularization value.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a process for large-scale production of high-purity phosphorus pentoxide directly using industrial yellow phosphorus and dry air or oxygen as raw materials. 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 tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/12
CPCY02P20/10
Inventor 曾波莫宾张峻杨亚斌蔡鸣
Owner YUNNAN CHEM RES INST