Synthetic method of sodium pentathiosulfate
A technology of sodium pentathiocarbonate and a synthesis method, which is applied in the directions of alkali metal carbonate, chemical instruments and methods, alkali metal compounds, etc., can solve the problems of low conversion rate, cannot use precipitating agent for heavy metal wastewater, etc., and achieves transformation High rate, easy continuous production, low cost effect
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[0014] A kind of synthetic method of sodium pentathiocarbonate. In this method, the raw materials for the synthesis of sodium pentathiocarbonate are sulfur powder and sodium perthiocarbonate. The synthesis steps are as follows:
[0015] ①Add sulfur powder into the aqueous solution of fully dissolved sodium perthiocarbonate and stir evenly. The molar ratio of sulfur powder to sodium perthiocarbonate is 2.0-2.5:1. Obviously, from the reaction Na 2 CS 3 +2S=Na 2 CS 5 It can be seen that the sulfur powder is in excess, and its purpose is to speed up the reaction. Usually, it is better to take a larger molar ratio.
[0016] ② Add ionic liquid to the mixed solution obtained in step ①, and stir fully. The volume ratio of ionic liquid to sodium perthiocarbonate aqueous solution is 1% to 5%, the synthesis reaction temperature is 30°C to 90°C, and the time is 5min to 40min . Generally, when conditions permit, a larger volume ratio, a higher reaction temperature and a longer reac...
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