The invention relates to a device and technology for continuously producing 2,2-dimethylolbutanoic acid. The technology comprises the following steps: carrying out continuous catalytic condensation onn-butylaldehyde and
formaldehyde through a first sheet-type
shower nozzle micro-reactor; after neutralizing a condensed product through
formic acid, carrying out continuous oxidization on the condensed product and
hydrogen peroxide in a second sheet-type
shower nozzle micro-reactor; acidifying an oxidized product through dilute
sulfuric acid, carrying out refining treatment of carrying out
crystallization after triple-effect concentration, centrifuging and separating, removing
sodium sulfate through
methanol, de-coloring, carrying out re-
crystallization after a
solvent is recycled, re-centrifuging,
drying, sieving and the like, so as to obtain a 2,2-dimethylolbutanoic acid product. According to the device and the technology, provided by the invention, the first sheet-type
shower nozzle micro-reactor is formed by connecting 5 to 6 sets of sheet-type shower nozzle micro-reactors in series and the second sheet-type shower nozzle micro-reactor is formed by connecting 6 to 8 sets of the sheet-type shower nozzle micro-reactors in series; condensation and oxidization are
continuous reaction; a production device occupies a small area, the technology is stable and easy to control and the conversion rate of the product is high; the
energy consumption is low, the emission amount of pollutants is small, the labor intensity is low, the production is safe and the production cost is low.