Abstract: SILP catalyst for the hydroformylation of olefins with synthesis gas, wherein the catalyst comprises at least one spherical catalyst pellet of radius R, characterized in that the catalyst complies with the following SILP modulus: c i c i , S = R x ? sinh ? ( ? SILP ? x R ) sinh ? ( ? SILP ) where ?SILP is a dimensionless number in respect of the spherical catalyst pellet relating the mass transfer, in the pore, across the phase interface between gas and ionic liquid and in the ionic liquid to the reaction, where ci is the concentration of a component i and ci,S is the concentration of a component i at the surface of the SILP catalyst pellet, and x is the position. Also featured is a process for hydroformylation of olefins with synthesis gas by using the SILP catalyst.

Abstract: A composition and the use of said composition as catalytically active composition in processes for synthesis of chemical compounds, especially the hydroformylation of olefinically unsaturated hydrocarbon mixtures.

Abstract: The invention relates to a hobbing machine for simultaneously hobbing n workpieces, comprising an n-fold milling head having n milling spindle axes that are parallel to one another, an n-fold tailstock and an n-fold workpiece spindle carrier having n workpiece spindle axes that are parallel to each other in a first horizontal main axis direction. The n-fold workpiece spindle carrier and the n-fold tailstock comprise n workpiece spindle carrier units or tailstock units which can be moved individually in a second horizontal main axis direction perpendicular to the first horizontal main axis direction along horizontal movement axes.