Patent Profile
| Patent No: | IN180519 [India] | Application No: | 693/DEL/94 |
| Title: | An improved process for the preparation of hydroxyapatite powder useful for bio-medical application | ||
| Issue Date: | 14-02-1998 | File Date: | 02-06-1994 |
| Inventor(s): | Mithlesh Kumar; Partha Sarathi; Debabrata Basu; Sandip Kumar Chattopadhyay; Manoj Kumar Basu | ||
| IPC Classification: | C01F, 11/02 | ||
| Abstract: | An improved process for the preparation of hydroxyapatite powder useful for bio-medical application which comprises: 1. Dispersing 1.0 to 1.5 mol calcium hydroxide in distilled water. 2. Stirring vigorously the resulting suspension and adding 0.6 to 0.9 mol ortho-phosphoric acid solution dropwise while maintaining the pH alkaline in the range of 10-11. 3. Maintaining the temperature in the range of 30oC to 80oC. 4. Allowing the gelatinous precipitate formed to age by keeping it for a period ranging from 20 to 30 hrs. 5. Separating the aged gelatinous precipitate and washing it with distilled water. 6. Drying the precipitate (residue/cake) at a temperature in the range of 650C to 75oC. 7. Calcining the dried powder at a temperature in the range of 750oC to 850oC for a period in the range of 2-4 hrs.
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: director[at]cgcri[dot]res[dot]in
:91-33- 24735829
:https://www.cgcri.res.in