A kind of refining purification device and method for by-product diisopropyl ether in the production of isopropanol

Abstract

The invention relates to a refining and purifying device and method used for a diisopropyl ether byproduct during production of isopropanol. According to the technical scheme, the top of an extraction tower is connected with an azeotropic tower by virtue of a buffer tank for the extraction tower, the bottom of the extraction tower is connected with a pump at the bottom of the extraction tower, and isopropanol is removed by virtue of the extraction tower; the top of the azeotropic tower is connected with a reflux tank for the azeotropic tower, and the bottom of the azeotropic tower is connected to a heavy component removal tower by virtue of a pump at the bottom of the azeotropic tower; the top of the heavy component removal tower is connected with a reflux tank for the heavy component removal tower by virtue of a condenser for the heavy component removal tower, the upper part of the heavy component removal tower is connected to a refining tower by virtue of a pipeline, and a pump is arranged at the bottom of the heavy component removal tower; the top of the refining tower is connected with a reflux tank for the refining tower by virtue of a condenser for the refining tower, and an isopropanol product is obtained at the bottom of the refining tower. The refining and purifying device and method used for the diisopropyl ether byproduct during production of isopropanol have the beneficial effects that the problems of difficult purification and poor quality of the diisopropyl ether byproduct during production of isopropyl are solved, a continuous production technology is adopted, and the defects of tedious operation and high energy consumption are overcome.

Description

technical field [0001] The invention relates to a chemical refining and purification method, in particular to a refining and purification device and method for diisopropyl ether, a by-product in the production of isopropanol. Background technique [0002] Diisopropyl ether is an important chemical raw material, which is widely used in chemical and pharmaceutical industries as an organic solvent and synthetic raw material. Separating and purifying diisopropyl ether from the by-product of producing isopropanol is a traditional method for producing diisopropyl ether. [0003] The by-product of isopropanol, crude diisopropyl ether, has complex components, and in addition to water and isopropanol, it also contains several isomers of C6 olefins and other heavy component impurities. Water, isopropanol and diisopropyl ether are azeotropic, and the boiling point of several isomers of C6 olefins is close to that of diisopropyl ether, with a difference of about 1°C, which makes the pu...

AI Technical Summary

Problems solved by technology

Water, isopropanol and diisopropyl ether are azeotropic, and the boiling point of several isomers of C6 olefins is close to that of diisopropyl ether, with a difference of about 1°C, which makes the purification of diisopropyl ether more difficult

The traditional purification method is to obtain the isopropyl ether product by rectification or pickling separation method. Because the components in the by-product of the isopropanol plant are more complicated, the rectification and separation are difficult, the product quality is poor, and the yield is low; and the acid Washing is very corrosive to equipment and has certain pollution to the environment, so it is rarely used in actual production

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