Patent ID: 9428433
Filing Date: 2016-08-30
CPC Classification: B01J,C07C

Claim Text:
1. A method for controlling the viscosity of reaction solutions in the hydroformylation of olefin-containing mixtures, the method comprising: i) contacting a mixture comprising saturated and olefinically unsaturated hydrocarbons, a composition which is catalytically active in hydroformylation, a gas mixture comprising carbon monoxide and hydrogen, and at least one solvent, in at least one reaction zone; ii) separating off products, with a gas stream comprising a mixture of saturated and olefinically unsaturated hydrocarbons, carbon monoxide and hydrogen being introduced into the at least one reaction zone, with the proviso that the products are discharged via a gas phase from the reaction zone; iii) condensing the products which have been separated off via the gas phase and passing them to further work-up; and iv) passing a bottom stream from at least one reaction zone to at least one membrane filtration, wherein the composition which is catalytically active in hydroformylation is retained in a retentate and recirculated to the at least one reaction zone and degradation products of the composition which are catalytically active in hydroformylation are removed via a permeate.