Chemistry: physical processes – Physical processes – Crystallization
Patent
1974-06-20
1976-06-29
Emery, Stephen J.
Chemistry: physical processes
Physical processes
Crystallization
23272R, 210 31C, 210198C, B01D 1500, B01D 1508
Patent
active
039664104
ABSTRACT:
An extraction device is disclosed comprising a tube containing a substantially inert, chemically non-reactive packing material with a large surface area to volume ratio. A sample which consists of organic compounds dissolved in a liquid, is introduced into the tube. As the sample passes through the packing material it spreads over the material's large surface area to form a thin liquid film which is held on the packing material in a stationary state. A particular group or family of compounds is extractable from the sample by passing a particular solvent system consisting of a solvent and selected reagents through the packing material. The reagents cause optimum conditions to exist for the compounds of the particular family to pass through the phase boundary between the sample liquid and the solvent of the solvent system. Thus, the compounds of the particular family are separated from the sample liquid and become dissolved in the solvent of the solvent system. The particular family of compounds dissolved in the solvent, representing an extract, exits the tube together with the solvent through the tube's nozzle, while the rest of the sample remains on the packing material in a stationary state. Subsequently, a different solvent system may be passed through the packing material to extract another family of compounds from the remaining sample on the packing material.
REFERENCES:
patent: 2733135 (1966-01-01), Huckabay
patent: 3625652 (1971-12-01), Fujimoto
patent: 3776698 (1973-12-01), Eisentraut
Partridge, Faraday Soc. Disc No. 7, 1949, pp. 246 to 305.
Treuner, Column Partition Chromatography, 1957, pp. 1 to 15.
California Institute of Technology
Emery Stephen J.
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