Przemysl Chemiczny, Vol.85, No.7, 497-502, 2006
Chromatographic characterization of petroleum's solid paraffins
SEC, TLC/FID, inverse GC, and simulated distillation using a SIMDIS HT-750 Analyzer were used to det. solid n-paraffins in the intermediates (raffinate and brightstock waxes prior to and past sweating) formed on prepg. a refined paraffin. TLC/FID analysis gave aromatics and resins. Hildebrand's soly. delta(2), (80-160 degrees C) and Flory-Huggins x(1,2)(infinity)-parameters (120 degrees C) were resp. detd. for the 3 intermediates and refined paraffin and for 104 binaries formed by these intermediates and refined paraffin with 26 solvents. The lower the off content, the lower the x(1,2)(infinity). The x(1,2)(infinity) were lowest in the refined paraffin-solvent systems. The X-1,2(infinity) and the delta(2) showed the brightstock waxes to be miscible, though structurally different, and potentially useful as hardeners in lubricants prepd. from paraffin waxes.