Separation device and separation method for triethylene diamine and ethanolamine

Abstract

The invention relates to the technical field of chemical engineering, in particular to a separation device and a separation method for triethylene diamine and ethanolamine. An extraction cavity is formed in an extraction tower in the separation device, a sealing plate is arranged at the bottom of the extraction cavity, and the sealing plate is connected with a movable rod of an electric lifting rod. A sleeve is arranged on the bottom surface of the extraction cavity, the movable rod is located in the sleeve, and the top surface of the sleeve is connected with an organ sleeve of which the top is connected with the bottom surface of the sealing plate. A light-phase liquid outlet is formed in the top of the extraction tower and connected with a treatment device, a treatment cavity is formed in the treatment device, a metal cylinder is arranged at the top of the treatment cavity, and the two ends of the metal cylinder communicate with the outer side of the treatment device. A drawing plateis arranged below the metal cylinder, a containing cavity is formed in the drawing plate, dry ice blocks are contained in the containing cavity, and a heat conduction plate is arranged at a cavity opening of the containing cavity. A first sieve plate is arranged below the drawing plate. An eccentric wheel is attached to the bottom face of the first sieve plate. According to the method, triethylene diamine and ethanolamine can be well separated.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a separation device and method for triethylenediamine and ethanolamine. Background technique [0002] Triethylenediamine is a foaming agent for the production of polyurethane soft, semi-rigid, and rigid foams, and is also used in ethylene polymerization catalysts, coatings, and plastic products. [0003] At present, the main raw materials for the preparation of triethylenediamine are N-hydroxyethylpiperazine, ethylenediamine, ethanolamine, piperazine and the like. When ethanolamine and liquid ammonia are used as raw materials to catalyze amination to synthesize ethylenediamine or piperazine, triethylenediamine can be co-produced. Since the boiling points of triethylenediamine (boiling point: 174°C) and ethanolamine (boiling point: 170°C) are very close, the two easily form an azeotrope, and it is difficult to separate them by conventional distillation methods. [0004...

AI Technical Summary

Problems solved by technology

Since the boiling points of triethylenediamine (boiling point: 174°C) and ethanolamine (boiling point: 170°C) are very close, the two are easy to form azeotropes, and it is difficult to separate them by conventional distillation methods

[0004] In the separation method of triethylenediamine and ethanolamine, the operation is often carried out through the extraction tower, but the extraction time of the current extraction tower is long, and the separation operation is often carried out through multiple devices, the operation is complicated, and the cooling and filtering effects are poor and the efficiency is low.

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