Method for settling vanadium by using acidic vanadium solution

A vanadium liquid and acidic technology, which is applied in the field of preparing vanadium pentoxide, can solve the problems of increased production costs, and achieve the effect of saving working hours and production costs

Inactive Publication Date: 2014-05-21
CHONGQING UNIV
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Problems solved by technology

Therefore, whether it is the acidic hydrolysis vanadium precipitation method or the acidic ammonium salt vanadium precipitation method, it is necessary to add a process of reducing the content of phosphorus in the acidic vanadium solution to below 0.02g / L in advance, which in turn leads to an increase in production costs

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  • Method for settling vanadium by using acidic vanadium solution

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Embodiment Construction

[0012] The invention discloses a method for precipitating vanadium by using acidic vanadium liquid. The method uses the acidic vanadium liquid as the stock solution to deposit vanadium. In the present invention, the vanadium precipitation process is carried out in a hydrothermal reaction kettle; the vanadium content in the acidic vanadium solution is 5.00-50.00g / L, and the impurity phosphorus content is 0.02-1.90g / L; the steps are as follows :

[0013] (1) Adjust the pH value of the acidic vanadium solution to 0.5-2.5 at one time (those skilled in the art know that when adjusting the pH value of the acidic vanadium solution, sulfuric acid——H 2 SO 4 ), and then placed in a closed hydrothermal reactor;

[0014] (2) Raise the temperature of the acidic vanadium solution to 100°C to 180°C to carry out the vanadium precipitation reaction (the reaction time should obviously be controlled by the amount of vanadium in the acidic vanadium solution and the reaction temperature, usually...

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Abstract

The invention discloses a method for settling vanadium by using an acidic vanadium solution. According to the method, the vanadium is settled in a hydrothermal reaction kettle by using the acidic vanadium solution as a stock solution. The content of the vanadium in the acidic vanadium solution is 5.0-50.0g / L, and the content of the impurity phosphorus is 0.02-1.90g / L. The method comprises the following steps: (1), adjusting a pH value of the acidic vanadium solution to 0.5-2.5 in one time, then placing the acidic vanadium solution in a closed hydrothermal reaction kettle; (2), raising the temperature of the acidic vanadium solution to 100-180 DEG C for molybdenum precipitation reaction; (3), after the molybdenum precipitation reaction is ended, cooling a prepared mixture solution, and filtering to obtain a polyvanadate-containing sediment; (4), drying at a temperature of 100 DEG C after washing the sediment by using water to obtain polyvanadate; (5), calcining the polyvanadate to prepare vanadium pentoxide, wherein the calcining temperature is 500-650 DEG C. Compared with the prior art, the method has the advantages that the total production cost is saved, the vanadium settling rate can always reach above 99 percent; after an ammonia salt is added in the vanadium settling process, the vanadium settling rate is further increased.

Description

technical field [0001] The invention relates to a method for preparing vanadium pentoxide with acidic vanadium liquid. Background technique [0002] Vanadium pentoxide (V 2 o 5 ) is an important industrial raw material, and one of the methods for preparing vanadium pentoxide is the acid hydrolysis vanadium precipitation method. The specific steps are: first use vanadium-containing minerals to prepare a vanadium-containing solution, then adjust the pH to become an acidic vanadium solution, and then use the acidic vanadium solution as a raw material for precipitation to obtain a precipitate ammonium polyvanadate [(NH 4 ) 2 V 6 o 16 ], and finally calcined the precipitate to obtain molten flake vanadium pentoxide. Since the vanadium precipitation rate of this method (the ratio of the vanadium element in the vanadium pentoxide to the vanadium element in the acidic vanadium solution) is only 80% to 90%, people add ammonium salts to acidic hydrolysis vanadium precipitation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02
Inventor 陶长元徐滔李航刘作华范兴杜军孙大贵刘仁龙阿依努尔陈嫚丽唐金晶左赵宏孔令峰谢昭明周小霞
Owner CHONGQING UNIV
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