Separation process by fractional crystallization

Details Separation process by fractional crystallization Separation process by fractional crystallization

1972-04-25

1976-06-01

Yudkoff, Norman

Refrigeration

Storage of solidified or liquified gas

Liquified gas transferred as liquid

260674A, B01D 904

Patent

active

039599787

ABSTRACT:
A crystallisable component, for example paraxylene, is separated from solution by chilling, separating crystals, washing them, chilling the mother liquor in the presence of wash liquid, separating further crystals and washing them. The invention enables concentrated solutions to be handled easily by keeping the proportions of crystals at each crystallisation stage low without requiring two separations of wash liquid from mother liquor.

REFERENCES:
patent: 2672487 (1954-03-01), Tegge et al.
patent: 2886587 (1959-05-01), Kolner
patent: 2945903 (1960-07-01), Findlay
patent: 2979453 (1961-04-01), Kiersted et al.
patent: 3050952 (1962-08-01), Marwil
patent: 3067270 (1962-12-01), Weedman
patent: 3216833 (1965-11-01), McKay et al.
patent: 3283522 (1966-11-01), Ganiaris

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