Pretreatment and extraction separation method of tungsten-molybdenum raw material solution

The invention belongs to the field of tungsten-molybdenum separation, and particularly relates to a raw material solution pretreatment method beneficial to tungsten-molybdenum extraction separation, which comprises the following steps: controlling the pH value of a tungsten-molybdenum mixed solution to be treated at 4.5-7; then hydrogen peroxide is added for a complexation reaction; and after the reaction, regulating the pH value of the solution to 0.5-2.5 to obtain a pretreated solution. The invention also comprises a method for extracting the pretreated solution to realize tungsten-molybdenum separation. The solution prepared through the method does not generate a third phase in the extraction process, the effect of deep molybdenum removal can be achieved without long-time placement of the solution, the tungsten co-extraction loss is small, the problem of an existing peroxy system tungsten and molybdenum extraction and separation technology is solved, the technological process is simplified, and industrial