Reactor for heterogeneous-phase reactions

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 69/82 (2006.01) B01F 3/04 (2006.01) B01J 10/00 (2006.01) B01J 19/24 (2006.01) C07C 51/265 (2006.01) C07C 63/04 (2006.01) C07C 67/39 (2006.01)

Patent

CA 2069652

23443-482 Abstract A reactor for carrying out heterogeneous-phase reactions, in particular gas/liquid reactions with a continuous liquid phase and a disperse (discontinuous) gas phase, is described, in which, in a horizontal plane, a substantially vertically upward- directed flow of the reaction medium takes place in part regions of the reactor cross-section and a substantially vertically downward-directed flow takes place in other part regions, the reactor having means for dispersing the discontinuous phase sub- stantially only in the part regions with upward-directed flow. The reactor is here designed in such a way that free flow of the reaction medium from the part regions with downward-directed flow to the part regions with upward-directed flow is possible in the region of the dispersing means. The preferred use of the pro- posed reactor is the exothermic oxidation of p-xylene and monomethyl p-toluate with air in the so-called Witten PMT process.

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