A kind of production method of acetone continuous dehydration

Abstract

The invention discloses a production method of continuous acetone dehydration, belonging to the technical field of continuous acetone dehydration. The production method comprises the following concrete steps: (1) feeding acetone stock solution into a first molecular sieve dehydrator, enabling the acetone stock solution to flow back to an acetone stock solution storage tank for continuous dehydration; and after the acetone dehydration is finished, feeding dehydrated acetone into a middle tank and further purifying through a distillation system; (2) after a molecular sieve in the first molecular sieve dehydrator is in a saturation adsorption state, feeding acetone to be dehydrated into a second molecular sieve dehydrator, enabling acetone to flow back to the acetone stock solution storage tank for continuous dehydration, and regenerating the molecular sieve in the first molecular sieve dehydrator; (3) after a molecular sieve in the second molecular sieve dehydrator is in a saturation adsorption state, switching acetone to be dehydrated into the first molecular sieve dehydrator (in which molecular sieve regeneration is finished) for continuous dehydration, and regenerating the molecular sieve in the second molecular sieve dehydrator, thus forming a circle. According to the production method, the continuous acetone dehydration can be ensured and the dehydration and regeneration of the molecular sieves can be continuously carried out.

Description

technical field [0001] The invention belongs to the technical field of continuous dehydration of acetone, and in particular relates to a production method of continuous dehydration of acetone. Background technique [0002] During the reflux reaction carried out by acetone as a solvent, due to the moisture generated during the reaction and the moisture contained in the raw materials, if the water content in the reaction system exceeds a certain amount, the reaction will be difficult to carry out, affecting the yield and quality of the product. The acetone after the reaction needs to be dehydrated, usually by using a molecular sieve dehydrating agent. [0003] Although the molecular sieve dehydration process has a stable and efficient dehydration effect, the molecular sieve needs to be regenerated after saturated adsorption, and the existing technology is to take out the molecular sieve dehydrating agent separately for regeneration. Molecular sieves will also adsorb a small a...

AI Technical Summary

Problems solved by technology

Molecular sieve will also adsorb a small amount of organic matter when it adsorbs moisture in organic matter. Therefore, if the molecular sieve is directly taken out for regeneration, there is a certain risk. After the regeneration of the molecular sieve is completed, the molecular sieve needs to be cooled and refilled.

Images