N-propyl acetate backing material treatment process

Abstract

The invention relates to the field of n-propyl acetate, and provides an n-propyl acetate backing material treatment process aiming at the problem that a backing material is difficult to treat in a process for preparing n-propyl acetate by adopting a sulfuric acid catalyst, the backing material comprises one or more of sulfuric acid, acetic acid, n-propyl acetate, water and n-propyl alcohol, and the backing material is stored in a backing material storage tank; wherein the bottom material storage tank is connected with the treatment kettle, the bottom material of the treatment kettle is discharged to the circulating pump, the circulating pump conveys the bottom material to the graphite heater for heating, the heated bottom material returns to the treatment kettle, a gas phase outlet in thetreatment kettle is communicated to the treatment tower, the top of the treatment tower is connected with the condenser, and the bottom of the treatment tower is communicated with the circulating pump. According to the invention, the backing material with high n-propyl acetate water content or high sulfuric acid content can be treated, so that the service life of the n-propyl acetate esterification heater is prolonged.

Description

technical field [0001] The invention relates to the field of n-propyl acetate, in particular to a process for treating n-propyl acetate bottom material. Background technique [0002] N-propyl acetate is usually produced by the reaction of acetic acid and n-propanol under the catalysis of concentrated sulfuric acid. The advantages of sulfuric acid catalyst are low catalytic temperature and low energy consumption. For example, patent CN110981721A discloses a "continuous production method of n-propyl acetate": mixing glacial acetic acid and n-propanol as a mixed raw material; first adding a catalyst to the mixed raw material and heating it to 80-108 ° C in the esterification kettle E2 For the esterification reaction, after the reaction starts to distill, the mixed raw materials are continuously injected into the esterification kettle E2; the reacted materials obtained in the esterification kettle E2 enter the esterification tower E1 for separation, and the top of the esterifica...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the bottom material is difficult to handle in the process of preparing n-propyl acetate with sulfuric acid catalyst, the present invention provides a n-propyl acetate bottom material treatment process, which can process the bottom material with high water content of n-propyl acetate or high sulfuric acid content. material, extending the service life of the n-propyl acetate esterification heater

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