The extraction equipment ( Centrifugal extraction machine) Two-phase solvent extraction
extraction device, Centrifugal extraction machine) Two-phase solvent extraction in the operation also note the following:
1) With small tube first violent vibration wave about 1 minutes, observe two fluid layer stratification after extraction. If easy to produce emulsion, a large number of extraction to avoid violent vibration wave, can prolong extraction time. Such as emulsifying phenomenon, emulsion layer can be separated, then use the new solvent extraction; Or the emulsion layer suction filter, or heat the emulsion layer slightly; Or a long time to place does not rotate, make its natural stratification. Emulsifying phenomenon is serious, can be used in a two-phase solvent reflux extraction plant continuously.
2） 2, dilute solvent dosage is too large, affect the operation.
3） Solvent and aqueous solution should maintain a certain amount, the proportion of extraction for the first time, solvent want to some more, generally for 1/3 of the water extract, the dosage of the later can be a bit less, a quarter - general 1/6.
4） General extraction 3 ~ 4 times. But hydrophilic hard to turn into larger components organic solvent layer, must increase the extraction times, or change the extraction solvent.
extraction device, Centrifugal extraction machine) Used by two-phase solvent extraction equipment, such as small extraction, can be in the separatory funnel; Extraction of quantity, but in smaller CWL20 - M type centrifugal extraction machine. A large number of extraction in the industrial production, CWL50 - in more M type pilot laboratory of centrifugal extraction machine, fully mixing, mass transfer, the second liquid separation. Source:
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