| abstract |
The invention provides a method for preparing erythritol by an electrochemical method. The method uses 1,3-butadiene as a raw material to prepare erythritol by a paired electrolysis one-pot method. The method adopts a zero-pole-distance electrolytic cell with a cation exchange membrane, the raw material 1,3-butadiene is oxidized at the anode to obtain 1,4-dibromo-2,3-dihydroxybutane, and the anolyte is reduced at the cathode 1,2,3,4-diepoxybutane is obtained, and the obtained catholyte is directly acidified without treatment to obtain erythritol, which is neutralized to obtain pure erythritol. The method has wide raw material sources, simple steps, high atom economy, less three wastes, low energy consumption and low cost. |