Novel method for increasing yield of triethylene glycol by EOEG device
A technology of triethylene glycol and a new method, which is applied in the preparation of ether from alkylene oxide, separation/purification of ether, preparation of ether, etc. It can solve the problems of small output and inability to meet market demand, etc.
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Embodiment 1
[0022] like figure 1 As shown, in a 7,000-ton / year ethylene glycol plant, the DEG rectification tower produces 110kg / hr of diethylene glycol, of which 65kg / hr of MEG is boosted by the pump and 7550g / h of the hydration feed pump is transported. EO aqueous solution (EO concentration 10%) is mixed, pumped and sent to a preheater (not shown in the figure), preheated to 160 degrees, and then enters the EO hydration reactor, the residence time of the reactor is 9min, and the reaction pressure is 21barg , the reacted components enter the multi-effect evaporation unit (heated by steam) to remove the water in the reaction solution, and the mixture of MEG, DEG and TEG without water is discharged from the tower kettle, and then pumped into the MEG rectification tower, the tower 875kg / hr of MEG is obtained at the top, and 130kg of DEG and TEG mixture in the tower kettle enters the DEG rectification tower, and 110kg / hr of DEG products are obtained at the top of the tower, of which 65kg / hr ...
Embodiment 2
[0024] like figure 1 As shown, in a 7,000-ton / year ethylene glycol plant, the DEG rectification tower produces 65kg / hr of diethylene glycol, of which 13kg / hr of DEG is used as a product, and the remaining 52kg / hr of DEG is recycled. After boosting the pressure, it is mixed with 7550g / h EO aqueous solution (EO concentration 10%) delivered by the hydration feed pump, and sent to the preheater (not shown in the figure) after the pump boosts the pressure. After preheating to 160 degrees, it enters the EO Hydration reactor, the residence time of the reactor is 9min, and the reaction pressure is 21barg. The reacted components enter the multi-effect evaporation unit (heated by steam) to remove the water in the reaction liquid, and the water-free MEG, DEG and TEG are discharged from the tower kettle The mixture is pumped into the MEG rectification tower, and the top of the tower obtains 875kg / hr of MEG, and the mixed solution of 117kg of DEG and TEG in the bottom of the tower enters t...
Embodiment 3
[0026] like figure 1 As shown, in a certain 7,000-ton / year ethylene glycol plant, the DEG rectification tower produces 65kg / hr of diethylene glycol, which directly enters the EO hydration upstream buffer tank, and the 7550g / h EO aqueous solution in the tank (EO concentration 10 %) mixed, pumped into the preheater (not shown in the figure), preheated to 160 degrees and then sent into the EO hydration reactor, the reactor residence time 9min, the reaction pressure 21barg, the components after the reaction Enter the multi-effect evaporation unit (using steam heating), remove the water in the reaction liquid, discharge the mixture of MEG, DEG and TEG without water from the tower kettle, and send it into the MEG rectification tower through pumping, and obtain 875kg / hr of distillate at the top of the tower. MEG, the mixture of 130kg of DEG and TEG in the tower kettle enters the DEG tower, and 110kg / hr of DEG products are obtained at the top of the tower, of which 65kg / hr is pumped u...
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