Purifying method for crude dioxane

[0018] Such as figure 1 As shown, the present embodiment 1 provides a method for purifying the crude product dioxane, comprising: at least 5 recovery towers; the crude product dioxane is suitable for successively passing through each recovery tower for gradual purification. The recovery towers are all atmospheric towers. The specific purification process is as follows:

[0019] The first step of purification: the crude product dioxane (the content of dioxane is about 3-8%) is transported to the first recovery tower (independent gap operation), the temperature is controlled at 90-110°C, and the gas phase at the top of the tower passes through the condenser After condensation, it is collected in the middle tank of the first recovery tower (the content of dioxane is about 20%), and a certain reflux ratio is controlled; the bottom material (basically water) can be treated as wastewater.

[0020] The second step of purification: pump the material in the middle tank of the first r...

[0026] On the basis of embodiment 1, present embodiment 2 provides a kind of dioxane purification system, comprising:

[0027] At least 5 recovery towers.

[0028] For the specific structure and implementation process of the recovery tower, please refer to the relevant discussion of Embodiment 1, and details will not be repeated here.