Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus containing
Reexamination Certificate
2007-02-06
2009-06-02
Witherspoon, Sikarl A (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Phosphorus containing
C568S008000
Reexamination Certificate
active
07541499
ABSTRACT:
Disclosed is a process for the recovery of phosphorus and/or iodine containing catalyst components, present as an organophosphorus compound such as trihydrocarbylphosphine compounds and tetrahydrocarbylphosphonium compounds, from a solution of at least one such organophosphorus compound in an organic solvent by the steps comprising (1) converting the organophosphorus compound to an iodide complex of a organophosphonium compound which is insoluble in the organic solvent; and (2) separating the insoluble iodide complex of the organophosphonium compound from the solution. The process also results in the recovery of iodine values present in the solution.
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Kanel Jeffrey Scott
Okrasinski Stanley John
Eastman Chemical Company
Graves, Jr. Bernard J.
Nelson Brett L
Nwaonicha Chukwuma O
Witherspoon Sikarl A
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