Storage device for cyclic impurity removal of diethyltoluenediamine

Abstract

The invention relates to the field of diethyltoluenediamine, in particular to a storage device for cyclic impurity removal of diethyltoluenediamine. The technical problem to be solved by the invention is to provide the storage device for cyclic impurity removal of the diethyltoluenediamine. The storage device for cyclic impurity removal of the diethyltoluenediamine comprises a mounting side frame column, tank body fixing rings, a storage tank body, a fixing underframe, a mounting table, an exhaust isolation feeding system, a precipitation layering system and a precipitation aggregation gas exchange system, wherein the tank body fixing rings are welded to the top and the middle of the left side of the mounting side frame column correspondingly. According to the storage device, storage is realized, meanwhile, an arylamine catalyst and an arylamine derivative inside are subjected to precipitation separation through continuous precipitation and solution layering, ion diffusion of a lower layer solution body and an upper layer solution body in a solution is avoided through a layering separation mode during the centrifugal precipitation aggregation process, and the secondary dissolution of precipitate can be avoided.

Description

technical field [0001] The invention relates to the field of diethyltoluenediamine, in particular to a storage device for circulating and removing impurities of diethyltoluenediamine. Background technique [0002] At present, it is mentioned in the prior art Chinese patent CN210545136U that "at present, an excessive amount of arylamine catalyst will be added when the diethyltoluene diamine stock solution is prepared, and these catalyst residues and a small amount of arylamine derivatives will affect the diethyltoluene diamine The purity of the amine stock solution is generally mixed by adding a certain amount of hydrochloric acid to the diethyltoluenediamine stock solution tank, so that this part of the residual catalyst is converted into precipitates, and then the supernatant is collected by the pump. However, due to the above The precipitation in the process takes a long time, and the sealing corrosion of the pump by the mixed liquid is serious, resulting in an increase in...

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Problems solved by technology

[0005] In order to overcome in the prior art, diethyltoluenediamine will come into contact with the air during the supernatant is drawn out and collected by using a pumping pump, causing the color of diethyltoluenediamine to change, and the chemical properties will also be affected; Add hydrochloric acid to the solution, at this time, the hydrochloric acid solution will diffuse from top to bottom. During the diffusion process, the catalyst precipitates out and settles down, and after the precipitation reaction occurs in the diethyltoluenediamine solution, use centrifugal operation to settle the precipitate Aggregation, at this time, the precipitate gathers to the bottom of the solution, but at the same time, different ions in the solution diffuse up and down during the centrifugation process, which will lead to the phenomenon that the precipitate that has been precipitated at the bottom of the solution is partially dissolved, so that the precipitate dissolves repeatedly after precipitation , making catalyst impurity removal inefficient, the technical problem of the present invention is to provide a storage device for cyclic removal of diethyltoluenediamine

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