Vacuum sublimation purification device

Abstract

Aiming at the problem that the sublimation and purification process is controlled only by experience of workers at present, the invention provides a vacuum sublimation and purification device which comprises a weight sensor, a fixing piece, a sealing piece, a controller, a heating wire and a vacuum sublimation pipe, sealing pieces are respectively arranged at two ends of the vacuum sublimation tube; the sealing piece is provided with an open hole, one part of the fixing piece extends into the vacuum sublimation tube through the open hole, and the joint of the fixing piece and the open hole is sealed, so that the air tightness of the vacuum sublimation tube is not damaged; the weight sensor is arranged on the part, extending into the vacuum sublimation tube, of the fixing piece and is connected with the controller; a heating wire connected with the controller is arranged on the outer wall of the vacuum sublimation pipe, and different heating wires are arranged in different temperature zones; and the controller is used for obtaining the diffusion rate of the raw material according to the weight information returned by the weight sensor, and controlling the temperature of each heating wire according to the diffusion rate, so as to realize finer control on the vacuum sublimation purification process.

Description

technical field [0001] The present application relates to the technical field of purification of solid organic compounds, in particular to a vacuum sublimation purification device. Background technique [0002] With the increase in the production capacity of organic light-emitting diodes, the demand for high-purity organic small molecule materials is increasing year by year, and now the vast majority of high-purity small organic molecules are produced from vacuum sublimation purification, and unidirectional sublimation is often used. . By setting a plurality of temperature ranges with different gradients in the vacuum sublimation tube of the vacuum sublimation equipment, the impurities in the organic compound are gradually separated from the target substance, so as to realize the purification of the target substance. Because in order to ensure the purity of the target substance, the purification process needs to be carried out in a vacuum environment. Therefore, there are s...

AI Technical Summary

Problems solved by technology

[0005] The purpose of this application is to provide a vacuum sublimation purification device, which solves the problem that various sensors cannot be installed in the vacuum sublimation tube at present, so that the control of the temperature of the heating wire in the entire vacuum sublimation purification process only depends on the worker's experience, which in turn leads to the control of the sublimation purification process. There are still big deficiencies

Images