Method of preparing NA2S (I)

摘要

In a method of preparing sodium monosulfide by means of reacting sodium and sulfur under protective gas, the entire sodium determined for reaction is placed in a receiver in a first stage, preheated to temperatures of 100 DEG -150 DEG C., sulfur is gradually added in the required amount of the material in the receiver under intensive mixing, whereby the temperature of the reaction mixture is maintained at 120 DEG -250 DEG C., and in a second stage the formed initial product is allowed to react under continuation of the mixing at 250 DEG -480 DEG C., until a Na2S content of at least 95% by weight has been attained.