Recover of glycine and glauber's salt from waste crystal liquor |
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| 申请号 | JP9493190 | 申请日 | 1990-04-10 | 公开(公告)号 | JPH03204844A | 公开(公告)日 | 1991-09-06 |
| 申请人 | W R Grace & Co; | 发明人 | JIYON SHII SANBAAGU; | ||||
| 摘要 | PURPOSE: To recover the subject two components by forming a slurry by controlling the temperature of the aqueous raw material solution comprising glycine and sodium sulfate and separating solid mixture. A part of the mother solution is recycled. CONSTITUTION: The subject material is recovered by separating the solid mixture from the mother solution by forming slurry by cooling the aqueous raw material solution consisting of glycine and sodium sulfate to a temperature of about 5°C at a rate of 5.8°C/hour. Seed crystals of glycine may be added before cooling the raw material solution, and seed crystals of 10 hydrate of sodium sulfate during the slurry formation. A part of the separate mother solution may be recycled in the crystallizing tank to reduce the density of the slurry. By this method the waste fluid produced in the process of manufacturing glycine can be minimized and valuable materials can be recovered from the waste fluid. COPYRIGHT: (C)1991,JPO |
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