Liquid purification or separation – Processes – Chromatography
Patent
1979-11-26
1981-06-23
Adee, John
Liquid purification or separation
Processes
Chromatography
55 67, 55386, 2101982, B01D 1508
Patent
active
042749670
ABSTRACT:
An apparatus and method for increasing the throughput of a chromatographic system by passing several samples in seriatim through tandemly connected first and second chromatographic columns. The eluant from the first column is sampled, or fractionated, and fractions of each of the samples are passed through the second column for further separation. A switching of the sampling valve, disposed between the first and second columns, effects such fractioning. The pumping rate for the second column may be different from that of the first column and allows that two or more sample fractions can occupy the second column concurrently. Column efficiency or separation power of the system can be further increased by continuously recycling the fractions through the second column or passing such fractions through a third column which forms a continuous cyclic flow path with the second column via appropriate valve switching. Recycling can be continued until complete separation is achieved.
REFERENCES:
patent: 3422665 (1969-01-01), Haase
patent: 3698156 (1972-10-01), Dirian
patent: 3917531 (1975-11-01), Magnussen
patent: 4001111 (1977-01-01), Geissler
patent: 4054430 (1977-10-01), Valentin et al.
Adee John
Technicon Instruments Corporation
Tedesco S. P.
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