Liquid purification or separation – With means to add treating material – Chromatography
Patent
1992-02-26
1992-10-13
Therkorn, Ernest G.
Liquid purification or separation
With means to add treating material
Chromatography
2105021, 210635, 210656, 502401, 502402, 502439, B01D 1508
Patent
active
051548224
ABSTRACT:
An organic compound is bonded to a powdered solid support to produce, for example, a chromatographic stationary phase, by introducing to a bed of powdered material the vapor of a precursor of the compound to be bonded which precursor is selected from those which produce a gas phase by-product of the bonding reaction. The gas generated by the reaction is utilized as the fluidizing gas. This permits the use of fluidized bed techniques on extremely low particle size powders. One example is the reaction of alkylchlorosilanes with silica gel to produce stationary phases with bonded carbon chains, derived from the alkyl groups, of up to 24 carbon atoms. A second feature of the method is the hydrothermal pretreatment of the bed of powder with steam to precondition the support.
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Snyder, Introduction to Modern Liquid Chromatography, Second Edition, John Wiley, 1979, pp. 177-183 and 272-279.
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Brunner and Schutte, "Chem-iker-Zeitung/Chemische", Apparatur 89, (Jul. 1965), pp. 437-440.
Khong Teck M.
Simpson Colin F.
3i Research Exploitation Limited
Therkorn Ernest G.
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