Patent Number: 8,815,058

Title: Extractive distillation of AsF.sub.5 and PF.sub.5 using HF

Abstract: Arsenic can be an impurity in phosphorous pentafluoride production processes. It is desirable to remove arsenic from phosphorous pentafluoride prior to using of the phosphorous pentafluoride in the production of lithium hexafluorophosphate. The present technology provides methods of removing arsenic from phosphorous pentafluoride by extractive distillation.

Inventors: Hulse; Ryan J. (Getzville, NY), Pointner; Bernie E. (Buffalo, NY)

Assignee: Honeywell International Inc.

International Classification: B01D 3/40 (20060101); C01B 25/10 (20060101); C01B 25/455 (20060101)

Expiration Date: 8/26/12018