Crude titanium tetrachloride refining vanadium-removing method

Abstract

The invention discloses a crude titanium tetrachloride refining vanadium-removing method, relates to the technical field of production of titanium tetrachloride, and provides the crude titanium tetrachloride refining vanadium-removing method which is high in vanadium-removing speed, good in effect and relatively low in cost. The crude titanium tetrachloride refining vanadium-removing method comprises the following steps: A, enabling crude TiCl4 liquid in a TiCl4 storage tank to enter a refining circulating tower; B, pumping the crude TiCl4 liquid in the refining circulating tower into a heat exchanger through a circulating pump in the tower, and enabling the crude TiCl4 liquid to pass through the heat exchanger to form high-temperature and pressurized crude TiCl4 liquid; enabling the high-temperature and pressurized crude TiCl4 liquid to enter a mixing tube; C, pumping fatty acid in a fatty acid storage tank into the mixing tube, mixing with the high-temperature and pressurized crude TiCl4 liquid, and reacting with impurities in the high-temperature and pressurized crude TiCl4 liquid to obtain a vanadium-removed slurry; D, after a reaction, spraying a mixture from the mixing tube into the refining circulating tower, and performing flash evaporation to vaporize a part of the TiCl4 liquid into TiCl4 vapor; enabling the TiCl4 vapor to enter a condensing system through a tower topsieve plate of the refining circulating tower, condensing and then enabling the TiCl4 vapor to enter a refined TiCl4 storage tank; and returning unvaporized TiCl4 liquid to the lower part of the refining circulating tower, and pumping into the heat exchanger again.

Description

technical field [0001] The invention relates to the technical field of titanium tetrachloride production, in particular to a method for refining and removing vanadium from crude titanium tetrachloride. Background technique [0002] Crude titanium tetrachloride refining technology mainly includes copper wire vanadium removal method, aluminum powder vanadium removal method, hydrogen sulfide vanadium removal method. The disadvantages of the copper wire vanadium removal method are that it is cumbersome to regenerate and wash the invalid copper wire, the labor intensity is high, the conditions are poor, and it produces copper-containing wastewater pollution, which is not easy to recover vanadium, the cost of vanadium removal is high, and the production is not continuous. The disadvantage of the aluminum powder vanadium removal method is that the ultrafine activated aluminum powder used is expensive and explosive. The disadvantage of hydrogen sulfide removal of vanadium is that h...

AI Technical Summary

Problems solved by technology

The disadvantages of the copper wire vanadium removal method are that it is troublesome to regenerate and wash the invalid copper wire, the labor intensity is high, the conditions are poor, and it produces copper-containing wastewater pollution, which is not easy to recover vanadium, the cost of vanadium removal is high, and the production is not continuous

The disadvantage of the method of removing vanadium with aluminum powder is that the ultrafine activated aluminum powder used is expensive and explosive

The disadvantage of hydrogen sulfide removal of vanadium is that hydrogen sulfide is a highly toxic, foul-smelling, explosive gas, and the working conditions are harsh.

Images