Method for treating high-concentration produced water in ethylene glycol antimony preparation process

The invention discloses a method for treating high-concentration produced water in an ethylene glycol antimony preparation process. The method comprises the following steps: distilling the produced water consisting of ethylene glycol and water at the pressure of (-0.06) MPa to (-0.09) MPa and the temperature of 45 to 75 DEG C to separate water with the ethylene glycol content less than 5 percent by weight to obtain ethylene glycol with the concentration of 95 to 98 percent by weight. The method realizes efficient separation of water and recycling of ethylene glycol based on the produced water consisting of the ethylene glycol and the water in the ethylene glycol antimony preparation process, and has the characteristics of low energy consumption and low cost.