| abstract |
The invention provides a micro-interface reaction device for preparing glycolic acid, which comprises a carbonylation reactor, a separation tank and an esterification reactor. A composite micro-interface generator is arranged inside the carbonylation reactor to break up and disperse carbon monoxide micro-interfaces. air bubbles, the first product from the carbonylation reactor enters the separation tank to separate glycolic acid and impurities, the second product separated from the separation tank enters the esterification reactor, and the esterification The bottom of the reactor is provided with a first pneumatic micro-interface generator for breaking and dispersing the gaseous methanol into micro-bubbles. By adding a composite micro-interface generator to the carbonylation reactor, the device increases the mass transfer area of the phase boundary between carbon monoxide and formaldehyde, effectively reduces the temperature and pressure during the carbonylation reaction, and thus saves energy consumption. By adding the first pneumatic micro-interface generator to the esterification reactor, the consumption of methanol is reduced and the cost is saved. |