Method of producing crystals of anhydrous sodium sulfide

Details Method of producing crystals of anhydrous sodium sulfide Method of producing crystals of anhydrous sodium sulfide

1988-06-23

1990-03-13

Straub, Gary P.

Chemistry: physical processes

Physical processes

Crystallization

4235611W, 23300, C01D 130, C01B 1700

Patent

active

049080431

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.

REFERENCES:
patent: 1699377 (1929-01-01), Roos
patent: 1774560 (1980-09-01), Meyer
patent: 2838374 (1958-06-01), Beyer
patent: 3666140 (1972-05-01), Aoyama et al.

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