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US 2008/0076944 A1Published application
Purification of Phosphorus Chelate Ligands
AssigneeBASF SE
InventorsMichael Bartsch, Robert Baumann, Gerd Haderlein, Tobias Aechtner, Jens Scheidel, Hermann Luyken, Peter Pfab, Wolfgang Siegel, Verena Weiskopf
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Abstract
A process for purifying phosphorus chelate ligands by extraction, by using polar extractants.
Claims20
A process for purifying phosphorus chelate ligands comprising extracting and optionally phase separating phosphorus chelate ligands with polar extractants at temperatures of from (−20) to 150° C. and a pressure of from 1 to 5000 Pa.
Dependencies are inferred from the claim text.