Microreactor device having an essentially vertical or inclined upper portion comprising means for collection and removal of gas formed in situ during a liquid-medium reaction and method
A microreactor device ( 100 ) comprises a microcircuit ( 110 ) defining a reaction microchamber ( 112 ) containing a liquid and reaction medium ( 114 ), in which a chemical reaction takes place generating the gas ( 116 ), and is characterized in that the device ( 100 ) is disposed substantially vertically or inclined, defining an upper part ( 120 ) and a lower part ( 130 ) of the microchamber, and in that means ( 150 ) are provided in the upper part ( 120 ) of the said microcircuit for the in situ collection and removal of the gas formed during the reaction.
1. A microreactor device ( 100 ) comprising a microcircuit ( 110 ) defining a reaction microchamber ( 112 ) for containing a liquid reaction medium ( 114 ), in which a chemical reaction takes place generating gas ( 116 ), characterized in that, the device ( 100 ) is disposed substantially vertically or inclined, thereby defining an upper part ( 120 ) and a lower part ( 130 ) of the microchamber, the microcircuit ( 100 ) comprises upper bends, each bend comprising at least one opening shaped to form an upper prolongation ( 186 ) of the circuit in the upper part, the said prolongations communicating with one another via a common duct ( 196 ) for the in situ collection and removal of the gas formed during the reaction.
2. Device according to claim 1 , characterized in that the upper prolongation ( 186 ) comprises a flared part ( 188 ) defining a chamber ( 190 ) for collecting and separating the gas from the liquid reaction medium.
3. Device according to claim 2 , characterized in that the collecting chamber ( 190 ) has a substantially spherical shape.
4. Device according to claim 1 , in which the bends are defined by an upstream fluid flow arm and a downstream fluid flow arm characterized in that the upstream fluid flow arm comprises an upstream wall opposite to the bend in continuity with an upstream wall of the prolongation ( 186 ) of the means ( 150 ) for collecting and removing the gas formed during the reaction.
5. Device according to claim 1 , characterized in that the common duct ( 196 ) for removing the gas formed during the reaction has a cross section which increases in the downstream direction of the device.
6. Device according to claim 1 , characterized in that the common duct ( 196 ) for removing the gas formed during the reaction also has an upper wall comprising sections rounded in an arch ( 198 ), two successive rounded sections defining a pointed part ( 199 ) substantially facing the openings communicating with the collecting means ( 150 ).
7. Device according to claim 1 , characterized in that the upper prolongations each comprise a chamber ( 190 ) having a cross section that is wider than the microcircuit at the bend.
8. Device according to claim 1 , characterized in that the surface of the microcircuit ( 110 ), at least at each upper bend, is treated to make this surface hydrophobic or organophobic so that the liquid reaction medium does not, or substantially does not, adhere thereto.
9. Device according to claim 1 , characterized in that a wall common to two successive bends comprises at least one deflector ( 220 ) in its upper part having the function of at least partly intercepting the drops entrained by the gas phase in the nascent region thereof.
10. Device according to claim 9 , characterized in that the deflector has a substantially mushroom shape.