Abstract
A preparative quantitative separation of THF- and CHCl/sub 3/-soluble solvent refined coal (Pittsburgh No. 8) has been demonstrated employing gel permeation chromatographic techniques utilizing three column packings: a styrene--divinyl benzene packing (Bio-Beads S-X4), a cross-linked poly(N-acryloylmorpholine) polymer (Enzacryl Gel K-1), and a modified alkylated dextran (Sephadex LH-20). Each packing material is evaluated based on the extent and time of separation and the cost of materials. The percent recovery in the Bio-Bead case is greater than 95 percent. Average molecular weights via vapor phase osmometry on the four sized fractions of THF-soluble SRC from Bio-Beads suggests that a separation according to molecular weight has been achieved. The description of a short tapered glass column to economically carry out these preparative separations is described.
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