Hydroformylation process employing a cobalt-based catalyst...

Details Hydroformylation process employing a cobalt-based catalyst... Hydroformylation process employing a cobalt-based catalyst...

2006-06-13

2006-06-13

Witherspoon, Sikarl A. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S455000

Reexamination Certificate

active

07060860

ABSTRACT:
A process for hydroformylating olefinically unsaturated compounds by means of a cobalt-based catalyst is carried out in a non-aqueous ionic liquid which is a liquid at a temperature below 90° C. and comprises at least one ammonium and/or phosphonium and/or sulfonium cation Q+and at least one anion A−; catalyst recycling is improved by using a ligand selected from the group consisting of Lewis bases and employing a depressurization step between the pressurized reaction step and the step for separating the phases by decanting. At the end of said depressurization step, the organic phase is separated in the decanting step and the non-aqueous ionic liquid containing the catalyst can be re-used.

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XP-002223564—Organometallics 2000, vol. 19, pp. 3818-3823, “Ionic Phosphine Ligands with Cobaltocenium Backbone: Novel Ligands for the Highly Selective, Biphasic, Rhodium-Catalyzed Hydroformylation of 1-Octene in Ionic Liquids”, Claudia C. Brasse et al.
English translation of French Application No. 01.00970.

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