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Process for the manufacture of p4o6

A technology of reaction products and reaction units, applied in the direction of phosphorus oxides, etc., can solve the problems of toxicity, spontaneous combustion, and reducing the economic application potential of P

Active Publication Date: 2014-06-25
MONSANTO TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emergence of such emulsions or suspensions leads to important separation difficulties due to the P 4 is toxic and pyrophoric, and thus requires extensive investment to ensure its safe and reliable removal and disposal
When used as the base material, the presence of elemental phosphorus severely reduces the P 4 o 6 economic potential

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] 4.05 moles of white phosphorus (P 4 ) was continuously fed into the evaporator and evaporated at 770K at atmospheric pressure. The resulting stream was fed into the chamber of a 7800 ml volume reactor. A continuous stream of oxygen was introduced into the same reactor at 12.3 moles per hour (as O 2 ). These reaction parameters correspond to a residence time in the reactor of 24 seconds. The reactor chamber was maintained at a temperature of 1750 K by means of external indirect cooling by removing excess heat of reaction through the chamber walls. The reaction product leaving the reactor chamber at the outlet was then contacted with a stream of 20 l / h of earlier condensed liquid reaction product obtained from a previous experiment carried out under the same parameters, cycled at 317K. The reaction product is cooled down to the temperature of the recycle liquid.

[0024] The experiment was stopped after 60 minutes.

[0025] The reaction product is subjected to a sim...

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PUM

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Abstract

The invention relates to a process for the production of P4O6 of high purity by reacting oxygen, or a mixture of oxygen and an inert gas, with gaseous or liquid phosphorus to generate said reaction product in a reaction unit. The reaction product is kept in the reaction unit at an average temperature in the range of 1600 and 2000 K by removing the heat created by the exothermic reaction of phosphorus and oxygen. A residence time of at least 1 second of the reaction product passing the reaction unit is maintained. The reaction product is then conventionally cooled in a quenching unit connected with the reaction unit. The final reaction product contains P4O6 with a very low content of elemental phosphorus.

Description

technical field [0001] The present invention relates to the manufacture of 4 o 6 Process for phosphorus (III) oxides, which are produced by the reaction of phosphorus with oxygen, wherein the reaction product obtained is in substantially pure form, and further, relates to compounds containing high purity P 4 o 6 products which can be manufactured by this method and which are suitable as basic materials, the term shall include its use as starting materials, raw materials and intermediates in the manufacture of organophosphorus (III) compounds (an industrially important class of chemicals) use. As used herein, the term "P 4 o 6 " intended to contain is usually used like P 2 o 3 All chemical formulas of phosphorus (III) oxides of (phosphorus trioxide). Background technique [0002] P is not prepared on a commercial scale in the prior art 4 o 6 , and although it has been proposed, it has not been used commercially, for example as a building block for the manufacture of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/12
CPCC01B25/12
Inventor 威廉·J·席佩尔
Owner MONSANTO TECH LLC