Preparation method of ammonium poly-vanadate

A technology of ammonium polyvanadate and calcium vanadate, applied in chemical instruments and methods, vanadium compounds, inorganic chemistry and other directions, can solve the problem that potassium and sodium content cannot be controlled correspondingly, the amount of ammonium carbonate added is large, and the production cost is high. problems, to achieve good economic and social benefits, reduce ammonia concentration, and improve the effect of vanadium grade
CN101157478AInactive Publication Date: 2008-04-09PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
Publication Date
2008-04-09
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention belongs to the chemical engineering field, in particular relates to a method for preparing ammonium polyvandata with vanadium-containing solution. The method uses the vanadium-containing solution produced with the traditional sodium roasting-water immersing technology as the raw material. First, vanadium combines with added calcium compounds and produces calcium vanadate, which reacts with ammonium bicarbonate and transfers vanadium into the solution but transforms calcium into more insoluble calcium carbonate; the ammonium polyvandata is produced with the separated solution under appropriate pH and heating conditions. After redissolution of calcium vandata, the ammonium bicarbonate containing less than 0.1percent of SUM (Na2O+K2 O) can be obtained. The ammonium bicarbonate can be used for production of vanadium trioxide and vanadium pentoxide with exceedingly low contents of potassium and sodium; and the ammonia content of vanadium-precipitation waste water is only 60percent to 75 percent of vanadium-extraction waste water in traditional technologies. The invention has very promising application prospect.
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Description

technical field

[0001] The invention belongs to the field of chemical industry, and in particular relates to a method for preparing ammonium polyvanadate from a vanadium-containing solution. Background technique

[0002] Vanadium is a rare metal with high melting point. It has many excellent properties and is widely used in metallurgy, chemical industry and other industries. With the rapid development of my country's modernization, the demand for vanadium and its compounds is increasing, the scope of use is becoming wider and wider, and its quality requirements are also higher. In the production process of vanadium nitrogen alloy, it is required that βˆ‘(Na 2 O+K 2 The lower the O) content, the better, and in the vanadium oxide products produced by the traditional sodium roasting-water method vanadium extraction process, βˆ‘(Na 2 O+K 2 O) content is generally 0.5% to 2%, which is much higher than that of vanadium-nitrogen alloy to the raw material Ξ£(Na 2 O+K 2 O) content r...

Claims

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