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Warranty

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株式会社和貴研究所 ナノサイエンス事業部〒270-0021
千葉県松戸市小金原7-10-25〒270-0021
千葉県松戸市小金原 7-10-25
株式会社サイエンスラボラトリーズ
TEL：047-309-8311
FAX：047-309-8310
TEL:047-309-8312
FAX:047-309-8313
URL：http//waki-bg.jp/nanotop/(800)
572 - 6653 • Fax: (616)396 - 7520 • 590 East 32nd Street, Holland,
MI 49423 •info@resolutionsys.com
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http://www.scilab.co.jp E-mail：support@scilab.co.jp
次世代技術知識集団 www.resolutionsys.com

Zone Refiner
Ultra-Purification of Organic Chemicals
Concentration of Impurities

In Zone Refining, a short molten zone travels slowly
through an elongated sample of a crystalline material. A molten zone traversing a solid sample has two
liquid-solidinterfaces;
a meltinginterface anda freezing
interface.
At the melting
interface thecomposition
sample of a crystalline material. A molten zone traversing a solid sample has two liquid-solid interfaces;
a melting interface and a freezing interface. At themelting interface the composition does not change
but at the freezing interface, the impurities favor theliquid phase because the crystal structure tends to
exclude molecules that do not readily fit into thecrystal lattice. Passing the molten zone(s) through thesample many times concentrates the impurities at one
end leaving the opposite end highly purified.

Free Zone Refiner
Simulator Software

Explains the theory of zone
refining and displays
how the sample is purified.
E-mail info@resolutionsys.com
to request your free copy.

The photo shows asample during therefinement process
in the MiniZone refiner. The sample iscontained in one (ortwo) disposable, thinwalled Teflon® sample
tubes. These tubes arefilled with the sample
and clamped oneach end in the tube
transport mechanism.
(The metal blocks at
the top and bottomof the photo.) The
transport mechanism
slowly moves the tubes
downward, passing
them through thefour heating and fourcooling zones of thetemperature regulated
metal blocks. After thetubes move downwardthe distance of one hotzone and one cold zone (two centimeters), the transport mechanism is reversed and the tubes are quickly
moved upward to the original position. The net resultof this motion is that the molten and crystalline zones
migrate slowly and continuously upward with respect
to the tubing.
With a typical zone rate of 2 cm/hr and with four active zones, each portion of the sample is subjected
to one purifying phase transitions per hour. Usually
within 18 hours of automatic operation (18 recrystallizations), the sample is purified. After the sample tube
is cooled, it is removed from the MiniZone. The refinedsample is easily recovered by cutting the tube intosections. The major portion of the impurities are concentrated at one end of the tube.

For more information on zone refining, please visit
our web site at www.resolutionsys.com.