High-purity tetramethyl hexamethylenediamine preparation system

By using a hydrogen distributor and a stirring device in the tetramethylhexanediamine preparation system, hydrogen is evenly dispersed and its full contact with the raw materials is promoted, safety hazards and uneven reaction problems caused by concentrated accumulation of hydrogen are solved, and high-purity tetramethylhexanediamine preparation is achieved.

CN222842043UActive Publication Date: 2025-05-09江苏万盛大伟化学有限公司
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Patent Information

Application Number
CN202422133551.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-02
Publication Date
2025-05-09
Estimated Expiration
2034-09-02

AI Technical Summary

Technical Problem

During the synthesis of tetramethylhexanediamine, hydrogen is prone to concentrated accumulation in the autoclave, resulting in safety hazards and affecting the reaction rate and the purity of the finished product.

Method used

The hydrogen distributor and agitating device are adopted. The hydrogen distributor evenly disperses hydrogen through the distribution plate and the distribution tube. The agitating device promotes full contact between hydrogen and raw materials through the stirring shaft and the stirring paddle to ensure uniform diffusion and reaction of hydrogen.

Benefits of technology

By uniformly dispersing hydrogen, the reaction rate and purity of the finished product are improved, the safety hazards of hydrogen accumulation are reduced, and the high purity preparation of tetramethylhexanediamine is ensured.

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Abstract

The utility model relates to the field of chemical production, and provides a high-purity tetramethyl hexamethylenediamine preparation system. Comprising a reaction unit and a rectification unit, the reaction unit comprises an autoclave, a stirring device is installed in the autoclave, a hydrogen feeding distributor is installed at the tail end of the bottom of a stirring shaft, the hydrogen feeding distributor comprises a distribution plate and a plurality of distribution pipes installed on the distribution plate, and the distribution pipes are communicated with an inner cavity of the distribution plate. And the center of the bottom of the distribution plate is communicated with the extension pipeline corresponding to the gas inlet through a rotary joint. Through the structural design of the hydrogen feeding distributor, it is ensured that hydrogen can uniformly enter the bottom of the high-pressure kettle from the inside of the hydrogen feeding distributor, so that the hydrogen can be in full contact with and react with materials in the high-pressure kettle in the rising process; the reacted mixed solution is pressed out from the bottom under the pressure of the autoclave and then sent into a rectification unit for subsequent treatment, and finally the high-purity tetramethyl hexamethylenediamine finished product is obtained after rectification of the rectification unit.
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