Steam recompression type manufacturing apparatus and steam recompression type manufacturing method of dichloropropanol

Abstract

The invention provides a manufacturing apparatus and a manufacturing method of dichloropropanol, wherein the apparatus and the method are suitable for producing dichloropropanol by carrying out a reaction on glycerol and a hydrogen chloride aqueous solution in the presence of a catalyst. The manufacturing apparatus comprises at least a reactor, a first distillation tower, a first phase separator,a first gas compression device and a first heat exchange device, wherein the first distillation tower is connected to the reactor, the first phase separator and the first gas compression device are connected to the tower top of the first distillation tower, and the first heat exchange device is connected between the first gas compression device and the first phase separator through a first flow path, and is connected to the side wall of the first distillation tower through a second flow path. With the manufacturing apparatus and the manufacturing method of the present invention, the dichloropropanol manufacturing cost can be reduced.

Description

technical field [0001] The invention relates to a production method of dichloropropanol, in particular to a vapor recompression production device and production method of dichloropropanol with a phase separator. Background technique [0002] At present, the main preparation method of dichloropropanol is the high-temperature chlorination of propene, which includes two steps: chlorinating propene at high temperature to generate allyl chloride, and using excessive industrial water, Allyl chloride is reacted with a chlorinating agent to form dichloropropanol. However, the use of high-temperature chlorination of propylene generates a large amount of wastewater and other wastes, thus posing technical and environmental problems. [0003] Therefore, a method of directly reacting glycerol and a chlorinating agent to produce dichloropropanol under the condition of a catalyst has been developed. This method will not produce a large amount of waste water and waste, so it is a more econ...

AI Technical Summary

Problems solved by technology

[0004] However, when using this method to prepare dichloropropanol, an azeotrope (azeotrope) of dichloropropanol and water will be formed. If an extractant (extractant) is added to separate the azeotrope to obtain dichloropropanol, it will increase the production efficiency. cost, and the extractant may also form an azeotrope with the catalyst, causing difficulties in the recycling of the catalyst

Images