Method for preparing natural gas desulfurizer sodium phosphomolybdate by utilizing nickel-molybdenum ores

The invention relates to a method for preparing a natural gas desulfurizer sodium phosphomolybdate by utilizing nickel-molybdenum ores, which comprises the following steps: 1, after carrying out oxidizing roasting on the nickel-molybdenum ores, obtaining calcine, mixing a phosphoric acid solution with the calcine, performing a stirring reaction, and after carrying out solid-liquid separation, obtaining filtrate containing nickel and molybdenum; 2, carrying out extraction on the filtrate containing the nickel and the molybdenum in the step 1 by an extraction system using TBP (Tri-Butyl-Phosphate) as an extraction agent and using sulfonated kerosene as a solvent, transferring the molybdenum into extraction liquid in a form of phosphomolybdic acid, and returning the extraction liquid for leaching the calcine; and 3, carrying out reverse extraction on the extraction liquid in the step 2 by deionized water to obtain a molybdophosphate heteropoly acid solution, and after adding a sodium hydroxide solid and complete