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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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