| abstract |
The present invention provides a device for continuously preparing 2,6-dihydroxybenzaldehyde and an application thereof. The device comprises a first continuous reaction unit for hydroxyl protection reaction, a second continuous reaction unit for lithiation hydroformylation reaction, and a third continuous reaction unit for protective group removal reaction which are sequentially connected in series, wherein the third continuous reaction unit comprises a first columnar continuous reactor which is connected to the second continuous reaction unit and used for performing liquid separation while performing protective group removal treatment on a lithiation hydroformylation product to obtain an organic phase containing the 2, 6-dihydroxybenzaldehyde and a water phase. When the device is applied to the preparation of the 2, 6-dihydroxybenzaldehyde, the reaction time is shortened, and intermediate purification treatment is not needed, so that compared with a batch process, the equipment cost and the post-treatment cost can be greatly saved, the production efficiency is greatly improved, and the industrialized enlarged production of the 2, 6-dihydroxybenzaldehyde is more facilitated. |