Improved sublimation purification method

Abstract

The present invention relates to an improved sublimation purification method. It utilizes a preset pressure, temp. and time to compress the powdered material to be purified into compact granules or ingot-like material firstly, because the compressed material to be purified is compacter than powdered material, so that unit volume can receive still more material to be purified, and can make the heat transfer efficiency of compressed material to be purified be raised, make the heating power be more stable, and in the sublimatiojn purification process a flowable inert gas can be added, and the inert gas can be used for carrying the sublimed purified material to make the purified material be flowed toward same direction and be deposited.

Description

technical field [0001] The invention relates to an improved sublimation purification method, in particular to the improvement of the production flow method when the powdery substance to be purified is purified by sublimation. Background technique [0002] Sublimation purification is mainly the operation of converting the mixture into two phases with the help of thermal energy, including the integration of gaseous and liquid separation, gaseous and solid state separation, and other technologies. For mixture systems with similar boiling points or common boiling points, it can also be obtained through a common The introduction of technologies such as boiling point distillation sublimation or extractive distillation sublimation achieves the purpose of refining and purification. [0003] At present, the sublimation purification method is to fill the sublimator with powdery substances to be purified, and heat and sublimate the substances to be purified in a vacuum environment to a...

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Problems solved by technology

[0003] At present, the sublimation purification method is to fill the sublimator with powdery substances to be purified, and heat and sublimate the substances to be purified in a vacuum environment to achieve the purpose of sublimation purification. However, because the substances to be purified are powdery, their organization is relatively loose, and each to be There are gaps between the purified substances, because the gaps cause poor thermal conductivity, especially in the vacuum state during sublimation purification, the poor thermal conductivity is more obvious

[0004] Because the substance to be purified is powdery, its organization is relatively loose, so its mass per unit volume is limited, resulting in a small amount of sublimation purification of the substance to be purified at one time. If the desired amount of purified substance is to be achieved, sublimation and purification must be performed multiple times. , and during sublimation purification, if you need to replace the substance to be purified, you must open the door of the purification chamber, and to open the door of the purification chamber once, you must do a cooling and pumping action, and after changing the substance to be purified, you must have Pumping and heating at one time, this action process not only wastes time, but also increases the probability of poor purification

[0005] Moreover, the general sublimation purification method makes the sublimated purified flow flow in any direction, so that the deposition amount of the purified product on each collection part is scattered, resulting in a waste of collection time

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