| 1 | The purity of vanadium pentoxide was more than 99%. | |
| 2 | The principles and low pollution process in production of vanadium pentoxide with stone coal containing vanadium are introduced in detail. | |
| 3 | The Fumaric is composed by furfural, with Sodium chlorate as oxidizing agent, catalyst of Vanadium pentox-jde. | |
| 4 | The optimal parameters for V2O5 extraction from stone coal with the technology of roasting-sulfuric acid leaching is investigated by orthogonal experiments. | |
| 5 | The leaching solution was purified by ion exchange, and then ammonium metavanadate was precipitated. A qualified product V 2O 5 was obtained by calcining ammonium metavanadate . |
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