3A Molecular Sieve For Adsorbing Trace Moisture in Ethyl Acetate Solution

Ethyl acetate often contains moisture, which forms an azeotrope with ethyl acetate. Under normal pressure, the azeotrope contains 8.5% water by mass. In order to obtain high-purity ethyl acetate, ethyl acetate must be refined. Commonly used refining methods mainly include: extraction refining process; azeotropic distillation with constant boiling agent and acetic acid extraction reaction distillation process, etc. The above refining process consumes a lot of energy.

3A molecular sieve has a strong adsorption effect on moisture, and it is simple to operate and easy to regenerate. Using 3A molecular sieve to adsorb moisture in ethyl acetate solution, high-purity ethyl acetate can be directly obtained, and the production process is simple and energy consumption is low.

The regeneration conditions in the cyclic adsorption process of 3A molecular sieve, the absorption effect after regeneration, and the structural changes and causes inside the molecular sieve after cyclic adsorption need further study, so as to reduce the deactivation rate of the molecular sieve while maintaining the adsorption effect as much as possible.

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