Emulsion crystallisation with recycle

Details Emulsion crystallisation with recycle Emulsion crystallisation with recycle

2005-02-15

2005-02-15

Hendrickson, Stuart L. (Department: 1754)

Chemistry: physical processes

Physical processes

Crystallization

C023S29500G, C023S297000, C023S299000, C023S301000

Reexamination Certificate

active

06855176

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).

REFERENCES:
patent: 3141743 (1964-07-01), Marsh
patent: 4010142 (1977-03-01), Hurlock et al.
patent: 5872259 (1999-02-01), Reuter
patent: 6428583 (2002-08-01), Reuter
patent: WO 9732644 (1997-09-01), None
Davey et al. “Purification of molecular mixtures below the eutectic by emulsion crystallization”, Jun. 22, 1995, Nature, vol. 375, pp. 664-666.

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