Method of producing crystals of anhydrous sodium sulfide
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United States of America Patent
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Mar 13, 1990
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N/A
app pub date -
Jun 23, 1988
filing date -
Jul 23, 1987
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Expired
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Abstract
Disclosed are single crystals of anhydrous sodium sulfide, and a method of producing single crystals of anhydrous sodium sulfide, characterized in that the method comprises concentrating an aqueous solution of sodium sulfide at a temperature of 97.degree. C. or higher, the solution containing about 2 to about 15% by weight of NaOH based on the aqueous solution to precipitate single crystals of anhydrous sodium sulfide from the aqueous solution.
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