heavy fraction

heavy fraction

[′hev·ē ′frak·shən]
(petroleum engineering)
The final products retrieved from crude oil during the process of distillation. Also known as end cut.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Silt+clay, microaggregate light fraction (micro_LF), sand-corrected microaggregate heavy fraction (micro_HF), macroaggregate light fraction (macro_LF), and sand-corrected macroaggregate heavy fraction (macro_HF) are presented.
This equipment regulates the air flow velocity by dividing the original sample into a light and a heavy fraction. A metallic valve numbered from 0 to 25 adjusts the air flow speed, that increases with the number of adjustment.
where [H.sub.arc] is the number of reads for a specific archaeal taxon in the heavy fraction, [H.sub.narc] the total number of reads in the heavy fraction minus [H.sub.arc], [L.sub.arc] the number of reads for the specific archaeal taxon in the light fraction, and [L.sub.narc] the total number of reads in the light fraction minus [L.sub.arc].
The collecting and separation system includes a condenser, a cooling system, a light fraction receiver with a gaseous product removing system, a crude heavy fraction receiver, and a vacuum evaporator.
The decomposition products of PP can react with bitumen to give a less heavy fraction with branched structure and the heavy fraction can also be degraded to give low molecular weight hydrocarbons and less coke residue than that of the coke deposit for pyrolysis of GOS.
Schideman noted that the heavy fraction could potentially be used in asphalt-like products.
The remaining heavy fraction begins to sink and settles over the seabed in about 6 weeks.
Field Microagg., fine fPOM, Silt + fine sand (53-250 clay [micro]m) (<53 [micro]m) Heavy fraction >53 [micro]m <53 [micro]m Heestert l 30.90 29.04 38.36 2 23.69 31.94 42.79 Kluisbergen 3 26.28 29.18 42.06 4 13.20 37.64 48.13 Baugnies 5 29.46 22.96 44.20 6 26.94 26.63 44.32 Maulde 7 9.50 37.76 50.10 8 8.27 36.39 53.33 Villers-le-Bouillet 9 6.13 32.46 58.88 10 5.67 29.73 63.23 Kuttekoven 11 14.65 34.69 48.87 12 12.52 36.32 50.02 Court-St-Etienne 13 6.92 36.65 53.94 14 6.07 37.87 53.71 RT (mean) 17.69 31.82 48.06 CT (mean) 13.77 33.79 50.79 s.e.
From every single coal three samples were obtained by sink-float separation in heavy liquids: light fraction (density <1.30 g [cm.sup.-3]), medium fraction (density 1.30-1.35 g [cm.sup.-3]), heavy fraction (density > 1.35 g [cm.sup.-3]).
The biocatalytically oxidized fuel is then distilled in order to eliminate the heavy fraction which contains most of oxidized organosulfur compounds.