Production process of high-quality sodium thiocyanate

The invention discloses a production process of high-quality sodium thiocyanate and belongs to the technical field of compound production. The production process comprises the following steps: A, introducing air or oxygen into an ammonia-soda process coking desulfuration waste liquid, and performing oxidation treatment on the waste liquid; B, decoloring the material liquid oxidized in the step A;C, putting sodium hydroxide into the material liquid decolored in the step B, and carrying out ammonia removal treatment; D, cooling the material liquid after ammonia removal treatment in the step C,keeping the temperature to carry out crystal separation, and filtering to obtain a sodium thiocyanate solution; E, filtering the cooled sodium thiocyanate solution after crystal separation by using anano filter membrane filtering system; F, concentrating the clear liquid obtained in the step E, cooling, carrying out centrifugation to obtain a sodium thiocyanate wet product, and drying the wet product, thereby obtaining a s