| 发明名称 |
Recovery of IDA and glauber's salt from waste crystal liquors. |
| 摘要 |
<p>The separation and recovery of iminodiacetic acid and sodium sulfate decahydrate from sodium sulfate solutions such as the liquor generated in the production of iminodiacetic acid are disclosed. The separation is accomplished by adjusting the temperature of the sodium sulfate solutions to crystallize the iminodiacetic acid and sodium sulfate decahydrate. Nitrilotriacetic acid optionally can be isolated prior to the crystallization of the IDA and sodium sulfate decahydrate.</p> |
| 申请公布号 |
EP0425131(A1) |
申请公布日期 |
1991.05.02 |
| 申请号 |
EP19900311134 |
申请日期 |
1990.10.11 |
| 申请人 |
W.R. GRACE & CO.-CONN. (A CONNECTICUT CORP.) |
发明人 |
THUNBERG, JON C. |
| 分类号 |
C01D5/00;C07C227/42;C07C229/16;C07C229/24 |
主分类号 |
C01D5/00 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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