Patent ID: 7014820

Claim:
A reactor apparatus including a pair of generally planar support elements ( 80 , 81 ) mounted coaxially on an axis of rotation ( 6 ) and having opposed facing surfaces, at least one of the support elements ( 80 , 81 ) being rotatable about the axis ( 6 ), characterised in that each facing surface is provided with a plurality of walls ( 84 , 85 , 86 , 87 ) which surround the axis of rotation ( 6 ) and which extend towards but do not contact the opposed facing surface, each wall ( 84 , 85 , 86 , 87 ) extending divergently from its surface towards the opposed surface with respect to the axis of rotation ( 6 ), the reactor being provided with feed means ( 4 ) for supplying at least one reactant to a region enclosed by the wall ( 84 ) closest to the axis ( 6 ), wherein the support elements are adapted for rotation at different velocities from each other.