JPS5735548A - Drying method of amino acid crystal - Google Patents
Drying method of amino acid crystalInfo
- Publication number
- JPS5735548A JPS5735548A JP11073580A JP11073580A JPS5735548A JP S5735548 A JPS5735548 A JP S5735548A JP 11073580 A JP11073580 A JP 11073580A JP 11073580 A JP11073580 A JP 11073580A JP S5735548 A JPS5735548 A JP S5735548A
- Authority
- JP
- Japan
- Prior art keywords
- crystal
- drying
- amino acid
- hydrate
- anhydrous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain an anhydride crystal of good quality in high yield, by drying a hydrate crystal of an amino acid under reduced pressure at specific temperatures in two stages.
CONSTITUTION: A hydrate crystal of an amino acid, e.g. L-serine monohydrate crystal, L-proline monohydrate crystal or L-arginine dihydrate crystal, is dried by heating at 40W60°C for 5hr or longer at a reduced pressure of usually 600mmHg or more, preferably 700W750mmHg for preventing the consolidation of the crystal and shortening the drying time, and then heated at 70°C or above to give an anhydrous amino acid crystal. The drying in the first step is carried out for volatilizing the water of crystallization at a suitable speed at a temperature higher, preferably about 5W10°C higher, than the transformation temperature of the hydrate crystal to the anhydrous crystal. The second drying step is carried out for evaporating the adhesive moisture of the crystal and drying the crystal sufficiently. The amount of the consolidated crystal to be recrystallized and redried can be remarkably reduced.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11073580A JPS5735548A (en) | 1980-08-12 | 1980-08-12 | Drying method of amino acid crystal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11073580A JPS5735548A (en) | 1980-08-12 | 1980-08-12 | Drying method of amino acid crystal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5735548A true JPS5735548A (en) | 1982-02-26 |
Family
ID=14543183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11073580A Pending JPS5735548A (en) | 1980-08-12 | 1980-08-12 | Drying method of amino acid crystal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5735548A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016159317A1 (en) * | 2015-03-31 | 2016-10-06 | 公立大学法人大阪市立大学 | Crystal of reduced glutathione |
-
1980
- 1980-08-12 JP JP11073580A patent/JPS5735548A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016159317A1 (en) * | 2015-03-31 | 2016-10-06 | 公立大学法人大阪市立大学 | Crystal of reduced glutathione |
| JPWO2016159317A1 (en) * | 2015-03-31 | 2018-02-01 | 公立大学法人大阪市立大学 | Crystals of reduced glutathione |
| US10640532B2 (en) | 2015-03-31 | 2020-05-05 | University Public Corporation Osaka | Crystal of reduced glutathione |
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