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Method for producing aluminum triphosphate by utilizing methyl phosphorus dichloride production waste

A technology of methylphosphorus dichloride and aluminum tripolyphosphate, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of easy spontaneous combustion, inability to directly purchase, difficult to store, etc., to avoid environmental pollution Effect

Active Publication Date: 2016-04-20
SICHUAN LESHAN FUHUA TONGDA AGRO-CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical property of methyl phosphorus dichloride is lively, it is very easy to react with water and oxygen in the air, easy to spontaneous combustion, difficult to store, and cannot be directly purchased in the market

Method used

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  • Method for producing aluminum triphosphate by utilizing methyl phosphorus dichloride production waste

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Effect test

Embodiment 1

[0017] A method for preparing aluminum tripolyphosphate from waste produced by methyl phosphorous dichloride, using methyl chloride, aluminum trichloride and phosphorous trichloride as raw materials, and the resulting complex is reduced under the catalysis of aluminum powder and steamed Phosphoric acid is added to the waste after the product methyl phosphorous dichloride, and a condensation reaction occurs at a high temperature of 250-450°C. After the reaction is completed, it is washed, dried, and finely pulverized to obtain an aluminum tripolyphosphate product.

Embodiment 2

[0019] A method for preparing aluminum tripolyphosphate from waste produced by methyl phosphorous dichloride, using methyl chloride, aluminum trichloride and phosphorous trichloride as raw materials, and the resulting complex is reduced under the catalysis of aluminum powder and steamed Phosphate is added to the waste after the product methyl phosphorous dichloride, and condensation reaction occurs at a high temperature of 250-450°C. After the reaction is completed, it is washed, dried, and finely pulverized to obtain an aluminum tripolyphosphate product.

[0020] The phosphoric acid or phosphate is added to make the molar ratio of phosphorus and aluminum in the material 2.9:1.

Embodiment 3

[0022] A method for preparing aluminum tripolyphosphate from waste produced by methyl phosphorous dichloride, using methyl chloride, aluminum trichloride and phosphorous trichloride as raw materials, and the resulting complex is reduced under the catalysis of aluminum powder and steamed Phosphoric acid is added to the waste after the product methyl phosphorous dichloride, and a condensation reaction occurs at a high temperature of 250-450°C. After the reaction is completed, it is washed, dried, and finely pulverized to obtain an aluminum tripolyphosphate product.

[0023] The phosphoric acid or phosphate is added to make the molar ratio of phosphorus and aluminum in the material 3.2:1.

[0024] Add the waste into the batching kettle, after heating to 40°C, stop heating, add phosphoric acid or phosphate under stirring, control the reaction temperature at 70°C, react for 4hrs, then transfer to the high temperature polycondensation kettle.

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Abstract

The invention provides a method for producing aluminum triphosphate by utilizing methyl phosphorus dichloride production waste. With methyl chloride, aluminum trichloride and phosphorus trichloride as raw materials, a complex generated through reaction is reduced under the catalysis of aluminum powder, phosphoric acid or phosphate is added into the waste left after a product methyl phosphorus dichloride is evaporated out, condensation reaction is performed at the high temperature of 250-450 DEG C, and after the reaction is completed, washing, drying and micro-grinding are performed to obtain the aluminum tripolyphosphate product. Resource utilization that methyl phosphorus dichloride production waste is utilized to prepare ternary complexes is achieved.

Description

Technical field [0001] The invention belongs to the technical field of glufosinate-ammonium production, and specifically relates to a method for preparing aluminum tripolyphosphate by using methylphosphorus dichloride production waste. Background technique [0002] Methyl phosphorus dichloride is an intermediate for the synthesis of organophosphorus compounds and an important intermediate for the herbicide glufosinate. Glufosinate-ammonium is an ideal herbicide for genetically modified resistant crops. It has the characteristics of high efficiency, low toxicity and broad herbicidal spectrum. With the rapid development of genetically modified crops, such as transgenic glufosinate-resistant rice and transgenic glufosinate-resistant soybeans, the market demand for glufosinate has also increased rapidly. The chemical properties of methylphosphorus dichloride are active, it is easy to react with water and oxygen in the air, it is easy to ignite spontaneously, and it is difficult to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/40
CPCC01B25/40
Inventor 姜永红廖霞蒋冲雨肖旭
Owner SICHUAN LESHAN FUHUA TONGDA AGRO-CHEM TECH CO LTD
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