Integrated process for co-producing phosphorus pentafluoride (pf5) and fluorosulfonic acid (hso3f)
AssigneeHoneywell International Inc.
InventorsHaiyou Wang, Bernard Pointner, Xinrui Yu, Akbar Mahdavi-Shakib
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Abstract
An integrated process for co-producing phosphorus pentafluoride (PF5) and fluorosulfonic acid (HSO3F) in high yield and purity via a single reaction step is provided. The method includes reacting a first reagent comprising an aqueous solution of hexafluorophosphoric acid (HPF6) and hydrofluoric acid (HF) with a second reagent comprising fuming sulfuric acid (H2SO4·SO3) and recovering a product mixture comprising phosphorus pentafluoride (PF5) and fluorosulfonic acid (HSO3F).
Claims20
An integrated process for co-producing phosphorus pentafluoride (PF5) and fluorosulfonic acid (HSO3F) comprising:
- (1) reacting anhydrous hydrofluoric acid (AHF) with polyphosphoric acid (H3PO4) in a first reactor to produce a first product mixture comprising hexafluorophosphoric acid (HPF6);
- and
- (2) reacting the first product mixture with oleum (H2SO4·SO3) in a second reactor to produce a second product mixture comprising phosphorus pentafluoride (PF5) and fluorosulfonic acid (HSO3F).
A process for co-producing phosphorus pentafluoride (PF5) and fluorosulfonic acid (HSO3F) comprising:
- (1) reacting hexafluorophosphoric acid (HPF6) with oleum (H2SO4·SO3) in a reactor;
- (2) collecting an overhead stream comprising phosphorus pentafluoride (PF5) from the reactor;
- and
- (3) collecting a bottoms stream comprising fluorosulfonic acid (HSO3F) from the reactor.
Dependencies are inferred from the claim text.