Hydroformylation process

A hydroformylation process comprising

• contacting in a first reactor train CO, H2, and a first feed stream comprising an olefin in the presence of a hydroformylation catalyst in a reaction fluid under hydroformylation conditions sufficient to form at least one aldehyde product,
• contacting in at least one additional reactor train CO, H2, and at least one additional feed stream comprising an olefin, in the presence of a hydroformylation catalyst in a reaction fluid under hydroformylation conditions sufficient to form at least one aldehyde product, wherein the additional reactor train is operated in parallel to the first train, and
• removing an effluent stream comprising the reaction fluid from each train and passing the effluent streams from at least 2 reactor trains to a common product-catalyst separation zone,
• wherein the composition of the first feed stream is different from the composition of at least one additional feed stream.