Methods and reactor designs for producing phosphorus pentafluoride

摘要

Processes and systems for the production of phosphorus pentafluoride (PF5) through continuous fluorination of phosphorus are provided herein. A phosphorus feed stream and a fluorine feed stream are provided to a reactor, wherein they are reacted in a gas-gas or liquid-gas reaction to produce phosphorus pentafluoride (PF5). The phosphorus feed can be derived from white phosphorus or yellow phosphorus, and can be provided to the reactor as a liquid or a vapor. The fluorine can be provided to the reactor as a vapor, and preferably comprises elemental fluorine gas.

主权项

1. A process for producing phosphorus pentafluoride, the process comprising the steps of:
providing a phosphorus feed stream to a reactor, the phosphorus in the phosphorous feed stream being elemental phosphorus comprising white phosphorus or yellow phosphorus; providing a fluorine feed stream to the reactor, the fluorine feed stream being a vapor stream comprising elemental fluorine gas; reacting the phosphorus feed stream and the fluorine feed stream in the reactor according to stoichiometry:
P+2.5F2→PF5; andremoving a product stream from the reactor that comprises phosphorus pentafluoride, wherein the step of providing a phosphorus feed stream to a reactor comprises:
introducing a liquid phosphorus feed stream into the reactor; and vaporizing the liquid phosphorus feed stream in the reactor.