Method for extraction

Details Method for extraction Method for extraction

1989-06-23

1991-07-23

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

422140, 210661, B01D 1100

Patent

active

050341324

ABSTRACT:
There is disclosed a method for extraction of impurities from a powdery or particulate solid material charged into a extractor. According to the disclosure, not only can the extraction of impurities be carried out efficiently, but also the refinement of a solid material can be carried out, with the degree of the extraction of the impurities being very high.

REFERENCES:
patent: 3970541 (1976-07-01), Williams et al.
patent: 4306058 (1981-12-01), Copelin
patent: 4589927 (1986-05-01), Allen et al.
Publication Chem. Ing. Tech. 56 (1984), No. 11, pp. 856-857.
"Supercritical Fluid Extraction", Principles and Practice, by McHugh and Krukonis, Butterworths Publishers (Boston) (1986), pp. 143-180.

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