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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Maeda; Kannosuke
Address:
Ashiya, JP
No. of patents:
3
Patents:












Patent Number Title Of Patent Date Issued
5173088 Process for preparing crystals of anhydrous sodium sulfide December 22, 1992
Disclosed is a process for preparing crystals of anhydrous sodium sulfide, the process being characterized in that the process comprises the steps of heating crystals of polyhydrate of sodium sulfide under a pressure of about 500 torr or less at a temperature varying not more than .+-.ab
5071632 Process for preparing crystals of anhydrous sodium sulfide December 10, 1991
Disclosed is a process for preparing crystals of anhydrous sodium sulfide, the process being characterized in that the process comprises the steps of heating a water-containing non-crystalline sodium sulfide at a temperature of about 30.degree. to about 89.degree. C. under a pressure of
4908043 Method of producing crystals of anhydrous sodium sulfide March 13, 1990
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 c










 
 
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