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AssigneeBASF SE
InventorsWolfgang Richter, Roland Krokoszinski, Rolf Muller, Michael McAtee
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Disclosed is a method for the hydroformylation of olefins comprising 2 to 8 atoms, whereby a) an inflow containing olefins and a gas mixture containing hydrogen and carbon monoxide are fed into a reaction zone and reacted in the presence of a hydroformylation catalyst, b) the reaction product which is released from the raw hydroformylation product is redirected into the reaction zone during the extraction of a gaseous recovery flow. The inventive method is characterised in that c) the recovery flow is brought into intimate contact with a wash liquid in order to eliminate the unreacted olefins contained therein, the wash liquid being a vented hydroformylation product, and the olefin-charged wash liquid and the raw hydroformylation product are redirected for regeneration. Said inventive method enables unreacted olefins to be reclaimed to a large extent from the recovery flow.
A process for the hydroformylation of olefins having from 2 to 8 carbon atoms, in which
A process as claimed in any of the preceding claims, wherein the scrubbing liquid is cooled to below 50° C. before being brought into contact with the bleed stream.
A process as claimed in any of the preceding claims, wherein the olefin used is propylene and n-butanal and isobutanal are produced.
A process as claimed in any of the preceding claims, wherein the hydroformylation catalyst used is a phosphorus-containing rhodium catalyst.
A process as claimed in any of the preceding claims, wherein the bleed stream which has been treated with the scrubbing liquid is cooled and/or compressed until the hydroformylation product present therein condenses.
A process as claimed in any of the preceding claims, wherein the olefin partial pressure in the reaction zone is from 30 to 40% of the total pressure in the reaction zone.
A process as claimed in any of the preceding claims, wherein the bleed stream which has been treated with the scrubbing liquid is utilized to generate heat or is used as starting material for the preparation of methanol. Hydroformylation of olefins having from 2 to 8 carbon atoms
Dependencies are inferred from the claim text.