B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
B01J 31/40 (2006.01) C07D 307/28 (2006.01)
Patent
CA 2141539
Disclosed is a process for the recovery of catalyst values from mixtures of catalyst compounds and oligomeric materials. The process provides for the separation of (i) an onium iodide compound, (ii) an organotin iodide compound, or (iii) a mixture thereof from a mixture thereof in an oligomer of a .gamma.,.delta.-epoxyalkene by the steps of (1) intimately contacting the mixture with an extraction solvent selected from hydrocarbons having 5 to 12 carbon carbon atoms; (2) allowing the mixture of step (1) to separate into two phases; and (3) recovering the extraction solvent phase containing iodide compounds (i) and (ii). The oligomer mixture of compounds (i) and/or (ii) is formed during the manufacture of 2,5-dihydrofurans by the isomerization of .gamma.,.delta.-epoxyalkenes.
L'invention porte sur un procédé pour la récupération de catalyseurs à partir de mélanges de catalyseurs et de substances oligomères. Le procédé consiste à séparer (i) un iodure d'onium, (ii) un iodure d'organoétain, ou (iii) un mélange de ces derniers, d'un mélange de ces derniers dans un oligomère de gamma,delta-époxyalcène : 1) en mettant le mélange intimement en contact avec un solvant d'extraction constitué de composés de 5 à 12 atomes de carbone; 2) en laissant le mélange de l'étape (1) se séparer en deux phases; 3) en récupérant la phase du solvant d'extraction contenant les iodures (i) et (ii). Le mélange oligomère des composés (i) et (ou) (ii) est formé lors de la préparation des 2,5-dihydrofuranes par isomérisation de gamma,delta-époxyalcènes.
Falling Stephen N.
Godleski Stephen A.
Kanel Jeffrey S.
Mcgarry Lynda W.
Nolen Timothy R.
Eastman Chemical Company
Gowling Lafleur Henderson Llp
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