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

Abstract

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.

Description

technical field [0001] The invention relates to a method for preparing o-nitroanisole and sodium chloride, in particular to a method for simultaneously preparing o-nitroanisole and sodium chloride. Background technique [0002] In the prior art, the preparation method of o-nitroanisole is usually as follows: pump o-nitrochlorobenzene into the metering tank and then add etherification kettle; add water from the water metering tank; pump o-nitrochlorobenzene Put it into the metering tank and then into the kettle; use a pump to pump sodium methoxide from the sodium methoxide storage tank to the metering tank, then use an air compressor to add compressed air to the sodium methoxide metering tank and etherification reaction kettle, raise the temperature and add sodium methoxide dropwise to control the drop Acceleration, temperature; after the dropwise addition, the etherification reactor is pressurized and heated for reaction, and the sample is analyzed. After passing the test, t...

AI Technical Summary

Problems solved by technology

Since this method needs to be washed with water to produce o-nitroanisole, it consumes more water resources, and the process is complicated, and the discharge of water also increases the burden on the environment.