Back to results
US 5,989,509 AGranted
Method for extracting antimony from elemental phosphorous
AssigneeEMC Corporation
InventorsLouis T. Gunkel, John Crosby, Theodore F. Munday, Paul J. Beck
Life of this patent
Estimating the term…
Abstract
A process for purifying elemental phosphorus that contains antimony using an oxidizer, such as hydrogen peroxide, peroxymonosulfate, peroxydisulfate, or a hypochlorite, in a two phase system containing water and phosphorus as the two liquids. A purified elemental phosphorus having 200 ppb or less antimony content.
Claims22
A process for purifying elemental phosphorous, the process comprising the steps of:
- (A) agitating a two phase system, wherein:
- the two phase system consists essentially of a water phase and a phosphorous phase,
- the water phase and the phosphorous phase are both liquids,
- the phosphorous phase comprises antimony-containing elemental phosphorous,
- the water phase comprises at least an effective amount of hydrogen peroxide;
- and
- (B) separating the water phase from the phosphorous phase.
4 more elements
Dependencies are inferred from the claim text.