Vanadium is an important strategic metal and has been widely applied in a multiple of industries. However, the current process for the production of vanadium compounds suffers from the generation of a significant amount of high salinity ammonium containing wastewater due to the mixing of sodium salts, ammonium salts, and acid during vanadium precipitation operation. In order to avoid the generation of wastewater at source, a clean and recyclable V₂O₅ production process was proposed and investigated in this study. Using NH₄VO₃ and NH₃·H₂O as precipitants, (NH₃)₂·3V₂O₅·H₂O and (NH₃)₂·V₂O₅·H₂O were obtained by precipitation of vanadate (V_xO_yⁿ⁻) from a high vanadate to sodium (V/Na) molar ratio acidic solution obtained via membrane electrolysis method, avoiding the generation of wastewater or solid waste. After calcination, high purity V₂O₅ product could be obtained. The vanadium precipitation process was investigated using ICP, XPS, SEM, XRD techniques, and the precipitation rate was investigated using solution conductivity method. Critical precipitation parameters such as excessive coefficient, solution temperature, solution V/Na molar ratio and solution pH were examined in detail. The results showed that increase the excessive coefficient, solution temperature and solution V/Na molar ratio, as well as reduce the solution pH would be beneficial for obtaining high purity vanadium products (≥99.9% V₂O₅). Optimum parameters were obtained at the V/Na molar ratio of 2.58, the excessive coefficient of 2, and the solution temperature of 363 K. The vanadium products obtained using both precipitants have a similar purity (more than 99.9%), however, due to a higher degree of hydrolysis reaction, the NH₄VO₃ precipitation method showed a higher V_xO_yⁿ⁻ precipitation rate (66.36%) in comparison with the NH₃·H₂O precipitation method (38.76%), indicating that the first method was superior. Based on this, a complete process with zero waste emission for V₂O₅ production was designed. The methods proposed and the results obtained from this study could provide fundamental information for the design of cleaner vanadium production process.

钒是重要的战略金属，已广泛应用于多个行业。然而，由于钒沉淀操作期间钠盐，铵盐和酸的混合，当前生产钒化合物的方法遭受大量高盐度含铵废水的产生。为了避免从源头产生废水，本研究提出并研究了一种清洁且可回收的V ₂ O ₅生产工艺。使用NH ₄ VO ₃和NH ₃ ·H ₂ O作为沉淀剂，（NH ₃）₂ ·3V ₂ O ₅ ·H₂ O和（NH ₃）₂ ·V ₂ O ₅ ·H ₂ O通过将钒酸盐（V _x O _y ⁿ⁻）从高钒酸盐与钠（V / Na）摩尔比的酸性溶液中通过膜电解沉淀而获得方法，避免产生废水或固体废物。煅烧后，高纯度V ₂ O ₅可以获得产品。采用ICP，XPS，SEM，XRD技术研究了钒的沉淀过程，采用溶液电导率法研究了钒的沉淀速率。详细检查了关键的沉淀参数，例如过量系数，溶液温度，溶液V / Na摩尔比和溶液pH。结果表明，增加过剩系数，溶液温度和溶液V / Na摩尔比，以及降低溶液pH值，对于获得高纯度钒产品（≥99.9％V ₂ O _5）都是有利的。）。在V / Na摩尔比为2.58，过量系数为2和溶液温度为363 K的情况下获得了最佳参数。使用这两种沉淀剂获得的钒产品纯度相似（大于99.9％），这是由于水解反应程度越高，与NH ₃ ·H ₂ O沉淀法（38.76％）相比，NH ₄ VO ₃沉淀法显示出更高的V _x O _y ⁿ⁻沉淀率（66.36％）。方法是优越的。在此基础上，完成了V ₂ O ₅零排放的完整过程设计生产。所提出的方法和从这项研究中获得的结果可以为清洁钒生产工艺的设计提供基础信息。