Straitmark Holding Ag

Willem Johan Schipper

A process for the production of a reaction product consisting essentially of POis carried out by reacting oxygen with phosphorus in an exothermic reaction in a reaction unit. Heat created by the exothermic reaction is removed by feeding POand/or by-products of the process into the reaction unit. The generated reaction product is then quenched to a lower temperature where no essential decomposition of the reaction product occurs, and at least part of POis separated from the reaction product obtained after quenching. The resulting yield of PObased on the phosphorus used is improved and the heat of the exothermic reaction can be controlled in an economic way.

Process for the manufacture of P4O6 with improved yield

The invention relates to a process for the production of POof 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 POwith a very low content of elemental phosphorus.

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Middelburg, Netherlands

Willem Johan Schipper