Emulsion crystallisation with recycle
AssigneeReuter Chemische Apparatebau KG [DE/DE]
InventorKarl Reuter
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Abstract
A method for purifying substances through emulsion crystallisation is described, whereby (a) an emulsion of organic liquid droplets in a continuous water phase containing the impure substance is formed; (b) the emulsion is super-saturated in the substance; (c) crystallisation of the substance in the water phase is induced; (d) the crystals of the substance are isolated from the from emulsion, yielding an emulsion-filtrate; (e) additional impure substance is dissolved in the emulsion-filtrate; and (f) steps (b)-(d) are repeated with the emulsion obtained from step (e).
Claims10
A process for purifying an impure substance through emulsion crystallization comprising the steps of
- (a) forming an emulsion of organic liquid droplets in a continuous water phase, which emulsion contains the impure substance;
- (b) super-saturating the emulsion in the substance;
- (c) inducing crystallization of the substance, whereby crystallization takes place in the water phase;
- (d) isolating the crystals of the substance resulting from step (c) from the emulsion, yielding an emulsion-filtrate;
- (e) dissolving additional impure substance in the emulsion-filtrate;
- and
- (f) repeating steps (b)-(d) with the emulsion obtained from step (e), whereby the level of impurities builds up in the emulsion with the repetition of steps (b) to (d).
Dependencies are inferred from the claim text.