| US 7,541,499 B2 | ||
| Process for the recovery of phosphorus and iodine containing catalyst components | ||
| Jeffrey Scott Kanel, Hurricane, W. Va. (US); and Stanley John Okrasinski, Kingsport, Tenn. (US) | ||
| Assigned to Eastman Chemical Company, Kingsport, Tenn. (US) | ||
| Filed on Feb. 06, 2007, as Appl. No. 11/702,853. | ||
| Application 11/702853 is a division of application No. 10/739785, filed on Dec. 18, 2003, granted, now 7,196,227. | ||
| Prior Publication US 2007/0142674 A1, Jun. 21, 2007 | ||
| Int. Cl. C07F 9/02 (2006.01) | ||
| U.S. Cl. 568—9 [568/8] | 10 Claims |
| 1. Process for the recovery of an organophosphorus compound from a solution of at least one such organophosphorus compound
and an iodine-containing compound in an organic solvent comprising the steps of (1) adding an oxidizing agent and elemental
iodine to the solution to convert the organophosphorus compound to an iodide complex which is insoluble in the organic solvent;
and (2) separating the insoluble iodide complex from the solution;
wherein the organophosphorus compound is tetrahydrocarbylphosphonium and has the structure:
 wherein R1, R2, R3 and R4 are independently selected from alkyl, phenyl, cycloalkyl, aryl, alkoxy, cycloalkoxy, phenoxy and aryloxy; and
wherein X− is a halide.
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