Process and device for separating isomers of isoamyl alcohol by heat pump rectification

Abstract

The invention relates to a process and a device for distilling and separating isoamylol isomeride by a heat pump. The device comprises a distilling tower, the heat pump, a reboiler, a buffer tank, a driving heat exchanger and a reflux pump. The distilling tower is provided with a tower top vapor phase port and a tower top discharge outlet, the tower top vapor phase port is hermetically connected with an inlet of the heat pump through a pipeline, the reboiler is provided with a shell pass inlet, a shell pass outlet, a pipe pass inlet and a pipe pass outlet, the shell pass inlet is hermetically connected with the heat pump through a pipeline, the pipe pass inlet of the reboiler is hermetically connected with a tower bottom of the distilling tower, the pipe pass outlet is connected with a vapor phase port on the lower portion of the distilling tower through a pipeline, and the shell pass outlet is connected with the buffer tank. The bottom of the buffer tank is provided with a liquid phase discharge outlet which is connected with an inlet of the reflux pump. An outlet of the reflux pump is divided into two material flows, one is connected with a tower top reflux port of the distilling tower through a pipeline, and the other one is used as discharge on the tower top.

Description

technical field [0001] The invention belongs to the technical field of chemical separation and energy-saving transformation, and in particular relates to a process and a device for separating isoamyl alcohol isomers by heat pump rectification. Background technique [0002] Fusel oil is a by-product of the production of alcohol by fermentation. my country's fermented alcohol production is about 6 million tons, of which fusel oil accounts for 0.3%. Isoamyl alcohol, also known as 3-methyl butanol, and its isomer 2-methyl butanol (commonly known as optical isoamyl alcohol) are the main components of fusel oil. [0003] At present, the mixture of two isomers is mostly used in China, and its mass fraction is about 15% of 2-methyl butanol and 85% of 3-methyl butanol. It is used as the starting material of spices and further reacted Form aldehydes, acetals, acids and esters and other products. Its mixture is relatively easy to produce, but its added value is relatively low. 2-Me...

AI Technical Summary

Problems solved by technology

[0005] The application of energy-saving technology for the separation of isoamyl alcohol isomers 2-methyl butanol and 3-methyl butanol is less. The patent CN102010292 preheats the raw material feed with the thermal energy of the steam at the top of the tower to achieve better separation effect, but did not elaborate on its energy-saving benefits

Images