Device for high efficiency continuous countercurrent extraction using a rotating helical tube
US4151089A · kind A · utility
7Cited by
7References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 17, 1978 |
| Grant date | Apr 24, 1979 |
| Priority date | — |
| Expiry date | May 17, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N30/42
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A continuous extraction system wherein two immiscible solvents move in opposite directions through a rotating helical column. Elution of a desired phase takes place by use of a separation device at the head end which selects either the heavier or the lighter phase. This may consist of a suitably weighted suspended outlet tube in a rotating cylindrical outlet chamber or may consist of a shunt and settling chamber located outside the rotating part; the heavier phase may be removed from the bottom and the lighter phase may be removed from the top.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.