Jet loop reactor having nanofiltration
View Patent ↗The invention relates to a device for the continuous, homogeneous-catalysis reaction of a liquid with a gas and optionally an additional fluid, wherein the device comprises at least one reactor having an external liquid circulation driven by a pump, and wherein the device has at least one membrane separation stage that preferably holds back the homogeneous catalyst. The aim of the invention is to specify a device that allows homogeneous-catalysis gas/liquid phase reactions, in particular hydroformylations, which operate with membrane separation of the catalyst to be performed economically at an industrially relevant scale. Said aim is achieved in that a jet loop reactor is provided as the reactor, and that the pump and the membrane separation stage are arranged in the same external liquid circuit.
1. A device, comprising:
a reactor having a pump-driven external liquid circuit; and
a membrane separation stage configured to retain a homogeneous catalyst,
wherein
the reactor is a jet loop reactor,
the pump and membrane separation stage are configured in the same external liquid circuit, and
a permeate-side free volume is in the membrane separation stage, wherein a free volume is at least 0.3 dm 3 per m 2 of a membrane surface.
2. The device of claim 1 ,
wherein
the pump is equipped structurally long-term pumping of fluids which comprise liquid and gaseous phases.
3. The device of claim 2 ,
wherein
the pump is a peripheral impeller pump.
4. The device of claim 1 , wherein a permeate-side gas discharge is configured downstream of the membrane separation stage.
5. The device of claim 1 ,
wherein
a heat exchanger adapted for heating or cooling a feed or a permeate of the membrane separation stage is arranged in the external liquid circuit.
6. The device of claim 1 ,
wherein
a tubular reaction space extends in the jet loop reactor, into which a jet nozzle adapted for injecting liquid into the reaction space and a suction tube adapted for extracting gas by suction both open out, and on which is a baffle plate-shielded takeoff adapted for the external liquid circuit.
7. The device of claim 1 , wherein a bypass conduit which is arranged in the external liquid circuit is parallel to the jet loop reactor or to the membrane separation stage.
8. The device of claim 1 ,
comprising
a multiplicity of jet loop reactors that are connectable in parallel and have a shared external liquid circuit, wherein the membrane separation stage is arranged within the shared external liquid circuit.
9. The device of claim 8 ,
wherein
the membrane separation stage comprises a multiplicity of membranes that are connectable in parallel in such a manner that an entire active membrane surface area of the membrane separation stage is adjustable by connecting and disconnecting the membranes.
10. The device of claim 1 , wherein the device is suitable for carrying out a homogeneous-catalytic reaction.
11. The device of claim 1 , wherein a heat exchanger adapted for heating or cooling a teed or a permeate of the membrane separation stage is arranged in the external liquid circuit, upstream of the membrane separation stage.
12. The device of claim 1 , wherein the free volume is at least 0.5 dm 3 per m 2 of a membrane surface.
13. The device of claim 1 , wherein the membrane separation stage comprises at least one membrane having a molecular weight cutoff in the range of 150 g/mol to less than 1000 g/mol.
14. The device of claim 13 , wherein the free volume is at least 0.5 dm 3 per m 2 of a membrane surface.