发明名称 |
Multistage fractional freezing for superpurifying crystallizable substances |
摘要 |
A method and apparatus are provided for superpurifying crystallizable substances to a purity level of 99.999 percent. Included is controlling the reflux ratio by controlling and/or metering transfers of crystals and mother liquid at selected locations and by maintaining a steady state of transfers between a plurality of stages that carry out similar operations.
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申请公布号 |
US4885016(A) |
申请公布日期 |
1989.12.05 |
申请号 |
US19880238917 |
申请日期 |
1988.08.31 |
申请人 |
GRIFFITHS, KENNETH F. |
发明人 |
GRIFFITHS, KENNETH F. |
分类号 |
C02F1/22;B01D9/00;B01D9/02;B01D9/04 |
主分类号 |
C02F1/22 |
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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