Method for preparing 2-Butoxyethyl acetate by continuous esterification reaction
A technology of ethylene glycol butyl ether and esterification reaction, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, etc., and can solve problems such as low production efficiency, complicated process, a large amount of solid waste and waste water, etc. problems, to achieve the effects of reduced production costs, simple operation methods, and high production efficiency
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Embodiment 1
[0020] process such as figure 1 As shown, the raw materials ethylene glycol butyl ether and acetic acid preheated to 110°C are input into the first-stage fixed-bed reactor 1 equipped with 5L solid acid catalyst continuously at a molar ratio of 1:1 at a flow rate of 15L / h, and the esterification The reaction temperature is 110°C, and the space velocity is 3h -1 . The materials reacted in the first fixed-bed reactor 1 enter the distillation tower 3. In the distillation tower 3, the water generated by the esterification reaction forms an azeotrope at 68-70°C in the presence of water-carrying agent benzene and is continuously absorbed separate. The dehydrated material is continuously drawn out with a flow rate of 30L / h in the stripping section of the distillation tower 3 and transported to the second stage fixed-bed reactor 2 equipped with a 5L solid acid catalyst to continue the esterification reaction. The reaction temperature is 120 ℃, space velocity is 6h -1 . The materia...
Embodiment 2
[0022] process such as figure 1As shown, the raw materials ethylene glycol butyl ether and acetic acid preheated to 90 °C are continuously input into the first-stage fixed-bed reactor 1 equipped with 5 L of solid acid catalyst at a molar ratio of 1.5:1 at a flow rate of 10 L / h. The reaction temperature is 90°C, and the space velocity is 2h -1 . The materials reacted in the first fixed-bed reactor 1 enter the distillation tower 3, and in the distillation tower 3, the water generated by the esterification reaction forms an azeotrope at 69-71 °C in the presence of cyclohexane water-carrying agent and continuously was separated. The esterification reaction material from which moisture has been removed is continuously extracted at a flow rate of 10L / h in the stripping section of the distillation tower 3 and transported to the second-stage fixed-bed reactor 2 equipped with a 5L solid acid catalyst, and the esterification reaction temperature is 125°C , airspeed is 2h -1 . The m...
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