Process for hydroformylation with removal of dissolved hydrogen

• Main Authors: Iryna Bennett, Michael Gavin John Williams
• Format: Patent
• Language: English
• Published: 13.04.2022
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

A process for producing an aldehyde via hydroformylating an olefin using a hydroformylation catalyst; recovering an effluent stream comprising the aldehyde, hydrogen and the hydroformylation catalyst; passing the effluent stream to a stripper; contacting the effluent stream with a strip gas in the stripper to produce a stripped effluent stream having a lower hydrogen concentration than the effluent stream; and recovering the stripped effluent stream. The strip gas may contain carbon monoxide, particularly wherein the carbon monoxide is provided via the separation of syngas into a hydrogen rich stream and a carbon monoxide rich stream. The used strip gas stream may be recombined with the hydrogen rich stream to form a recombined syngas stream, which may be fed to the hydroformylation reaction. The recombined syngas stream may be added directly to the hydroformylation reaction or mixed with a syngas feed prior to being fed to the hydroformylation reaction. The stripped effluent stream may be fed to a vaporiser to produce a vapour stream comprising the aldehyde and a liquid stream comprising the catalyst. Carbon dioxide may be fed to the vaporiser.