Application of o-nitroanisole by-produced sodium chloride in chlor-alkali technology

The invention discloses application of o-nitroanisole by-produced sodium chloride in chlor-alkali technology. The application comprises the steps of implementing reaction on sodium methylate and o-nitrochlorobenzene to obtain o-nitroanisole and by-produce sodium chloride, filtering the by-produced sodium chloride through a 200-mesh filter to obtain damp sodium chloride, washing the damp sodium chloride through methanol and filtering the damp sodium chloride to obtain relatively clean sodium chloride which contains trace organic substance, burning the sodium chloride for 10min in an incinerator at 500 DEG C to burn the organic substance in the sodium chloride into carbide, thus obtaining grey sodium chloride, thinning the sodium chloride through water to obtain saturated salt water, filtering the saturated salt water through a filter to remove carbide of the organic substance, thus obtaining pure salt water, and delivering the pure salt water to a chlor-alkali plant to prepare caustic soda. According to the application, sodium chloride is recycled, so as to save energy and reduce environmental pollution.