FIELD: methods of production of tungsten- and/or molybdenum-containing solution from solution of corresponding raw material after alkali opening. SUBSTANCE: method includes stages of acidifying of initial solution with gaseous carbon dioxide and subsequent separation of formed precipitate, and membrane electrolysis on cation-selective membranes due to the fact that acidifying is effected up to pH 8-10. After separation of formed precipitate, solution is treated with anionite at pH 6-10. EFFECT: higher economic efficiency of process. 3 cl, 1 ex
