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US 10,882,746 B2Granted
Method for the purification of yellow phosphor
AssigneeLANXESS Deutschland GmbH
InventorsJan-Gerd Hansel, Rolf-Michael Jansen, Bernd Rosenow
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Abstract
The present invention relates to a process for continuous purification of yellow phosphorus by adsorption onto activated carbon.
Claims19
A process for purifying impure phosphorus comprising:
- a) continuously introducing and contacting liquid impure phosphorus, without prior treatment of the impure phosphorus with polyphosphoric acid, with at least one activated carbon fixed bed containing at least one activated carbon, and
- b) continuously withdrawing liquid purified phosphorus from the activated carbon fixed bed.
Dependencies are inferred from the claim text.