Method for discoloring in process of refining coarse titanium tetrachloride from organic substances

Abstract

The invention discloses a method for discoloring in a process of refining coarse titanium tetrachloride from organic substances. The method comprises the following steps: sufficiently mixing the organic substances which account for 0.12%-0.35% of the weight of coarse titanium tetrachloride with coarse titanium tetrachloride to obtain a mixture; adding the mixture into a primary packing tower to remove vanadium, enabling vanadium-removed qualified titanium tetrachloride to pass through a float valve tower to remove low-boiling-point substances, enabling titanium tetrachloride with qualified low-boiling-point substances to pass through a secondary packing tower to remove high-boiling-point substances, and discoloring. The method is characterized by comprising the following steps: completely collecting and storing unqualified vanadium-removed tetrachloride in the primary packing tower, not returning unqualified vanadium-removed tetrachloride to the primary packing tower for being subjected to secondary vanadium removal, and adding the collected and stored unqualified vanadium material which accounts for 10-25% of the weight of the qualified vanadium material as well as the qualified vanadium material into the float valve tower and a secondary packing tower, thereby obtaining a qualified fine titanium tetrachloride product. The method disclosed by the invention has the characteristics of simple process, less equipment addition and modification, less investment, good effects of discoloring and removing organic substances in titanium tetrachloride, high production efficiency, energy conservation, consumption reduction and the like.

Description

technical field [0001] The invention belongs to the technical field of titanium tetrachloride production, and particularly relates to a treatment method for removing chroma in titanium tetrachloride products during the production of titanium tetrachloride refined by removing vanadium from organic matter. Background technique [0002] Crude titanium tetrachloride is yellow-brown or dark red, and contains a variety of complex impurities. The crude titanium tetrachloride must be refined to meet the standard requirements before it can be used in sponge titanium or other industrial production. During the refining process, there are A process dedicated to the separation of vanadium impurities. [0003] Vanadium in crude titanium tetrachloride is VOCl 3 The boiling point (127.2°C) is similar to the boiling point of titanium tetrachloride (136.4°C), and the two can be completely miscible. The methods for separating vanadium-containing impurities in the refining production of crude ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in the prior art, the invention provides a method for removing color in the process of refining crude titanium tetrachlo...

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