Continuous preparation system and preparation method for triisobutyl aluminum

Abstract

The invention discloses a continuous preparation system and method for triisobutyl aluminum, and belongs to the technical field of triisobutyl aluminum production. The triisobutyl aluminum continuous preparation system comprises a plurality of reactors which are connected in series, and stirrers are arranged in the reactors; the stirrer comprises a rotating shaft, and a first propeller blade, a centrifugal blade and a second propeller blade which are sequentially arranged on the rotating shaft; the rotating directions of the first propeller blade and the second propeller blade are opposite; the centrifugal paddle comprises a disc body and a plurality of arc-shaped blades arranged on the side face of the disc body, and the arc-shaped blades are annularly arranged relative to the axis of the disc body.

Description

technical field [0001] The invention belongs to the technical field of triisobutylaluminum production, in particular to a triisobutylaluminum continuous preparation system and a preparation method. Background technique [0002] The statements herein merely provide background related to the present invention and do not necessarily constitute prior art. [0003] Triisobutylaluminum is the main catalyst for the production of synthetic rubber, synthetic fibers and synthetic plastics. It is generally obtained by synthesizing active aluminum powder with isobutylene and hydrogen at high temperature and high pressure. In the production process of triisobutylaluminum, the preparation system directly determines the conversion rate of raw materials, the quality of products, and the level of energy consumption. [0004] In the original production system, the reactor was used for intermittent feeding, and through the steps of temperature increase and pressure increase, constant temperat...

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Problems solved by technology

[0004] In the original production system, the reaction kettle was used to feed materials intermittently, and after steps such as temperature rise and pressure rise, constant temperature reaction, and temperature drop and discharge, frequent temperature rise and fall resulted in large fluctuations in product quality and high energy consumption.

[0005] When it is necessary to increase the output, it is generally necessary to increase the volume of the reactor. Since the reaction is carried out under high temperature and high pressure, when the volume of the reactor increases, there are likely to be greater safety hazards

[0006] In addition, the reaction raw materials of triisobutylaluminum are active aluminum powder, solvent, isobutylene and hydrogen, so the solid phase, liquid phase and gas phase coexist in the reaction system, and the existence of bubbles will easily reduce the contact area of ​​raw materials, thereby affecting the normal course of the reaction

Especially when the volume of the reaction kettle is large, it is difficult to fully stir, and it is even more difficult to fully mix the three-phase raw materials, resulting in a low reaction rate and a low reaction conversion rate, and it needs to be reacted at high temperature and high pressure for a long time. Big security risk

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