Process for the recovery of phosphorus and iodine containing catalyst components
AssigneeEastman Chemical Company
InventorsJeffrey Scott Kanel, Stanley John Okrasinski
Life of this patent
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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 tetrahydro-carbylphosphonium 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.
Claims26
Process for the recovery of an organophosphorus compound from a solution of at least an organophosphorus compound in an organic solvent which comprises the steps of (1) converting the organophosphorus compound to an iodide complex which is insoluble in the organic solvent;
- and (2) separating the insoluble iodide complex from the solution.
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 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.
Process for the recovery of an organophosphorus compound compounds 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 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.
Process for the recovery of phosphorus and iodine components from a catalyst solution comprising a Group VIII non-noble metal, methyl iodide and a tetrahydrocarbylphosphonium iodide dissolved in a process solvent comprising acetic acid or a mixture of acetic acid and water which comprises the steps of (1) converting the organophosphonium iodide to an iodide complex of the organophosphonium iodide which is insoluble in the process solvent;
- and (2) separating the insoluble iodide complex of the organophosphonium iodide from the solution.
Process for the recovery of an organophosphorus compound from a solution having a trihydrocarbyphosphine compound in an organic solvent which comprises the steps of (1) converting the trihydrocarbyphosphine compound to a tetrahydrocarbylphosphonium compound;
- (2) converting the tetrahydrocarbylphosphonium compound to an iodide complex which is insoluble in the organic solvent;
- and (3) separating the insoluble iodide complex from the solution.
Dependencies are inferred from the claim text.