Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1977-08-22
1979-07-10
Adee, John
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
55 67, 55386, 1062868, 252449, 252477R, 210198C, B01D 1508
Patent
active
041607287
ABSTRACT:
Disclosed herein is a resolving zone for a chromatograph comprising a plurality of porous, silica macroparticles chosen to provide the resolving zone with a bimodal pore distribution, the average pore size for each mode being such that the linear portions of the molecular weight calibration curve for each pore size in the bimodal distribution are nonoverlapping and the pore volume of each mode being such that the aforesaid linear portions are substantially parallel. The macroparticles can be either totally or superficially porous. The resolving zone can be composed of either a plurality of macroparticles each having a bimodal pore distribution or a plurality of macroparticles having one pore size distribution and a plurality of macroparticles having another pore distribution.
REFERENCES:
patent: 3488922 (1970-01-01), Kirkland
patent: 3505785 (1970-04-01), Kirkland
patent: 3757490 (1973-09-01), Ma
patent: 3782075 (1974-01-01), Kirkland
Multiple Columns in Chromatography by Baker and Zinn in Control Engineering, Jan. 1961, pp. 77-81.
Selection of GPC Columns by Calculations to Produce a Column Set with Desired Molecular Weight Range and Calibration Range by Saunders and Rehfeldt in Journal of Chromatography Science. Oct., 1973, pp. 511-513.
"Linearity of Calibration Curves in Gel Permeation Chromatography and Mixed Gel Columns" by Ishida et al. in Kobunshi Kagaku (Chem. High Polymers) 27, 297, 33-39 (1970) translation.
Kirkland Joseph J.
Yau Wallace W.
Adee John
E. I. Du Pont de Nemours and Company
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