For the saturated hydrocarbons
, a 30 m HP-5MS fused silica column (0.25 mm i.d., 0.25 [micro]m film thickness) with He as the carrier gas was used.
In this paper, saturated hydrocarbon
fractions were extracted from crude oil and source rocks using organic geochemical methods.
Selectivity at 200 and 400[degrees]C was lower than conversion because of the appearance of [C.sub.8]-[C.sub.19] saturated hydrocarbons
in the products.
The change of saturated hydrocarbon
component before and after the aquathermolysis of heavy oil was analyzed by gas chromatograph, as shown in Fig.
Gas chromatograms of the saturated hydrocarbons
of selected Nangqian oil shale samples are shown in Figure 4, and the parameters of all samples are summarized in Table 2.
The concentrated extracts were separated into saturated hydrocarbons
, aromatic hydrocarbons and non-hydrocarbons and eluted successively with n-hexane, toluene and chloroform:methanol (98:2), respectively, by using a silica gel-alumina chromatographic column (after precipitation of asphaltenes).
It can be observed that concentration of a definite aliphatic saturated hydrocarbon
is relatively higher than the corresponding aliphatic unsaturated hydrocarbon fraction of the sample.
Paraffinic Hydrocarbons: Saturated hydrocarbon
compounds with the general formula [C.sub.n][H.sub.2n+2] containing only single bonds.
* Comboloob 0856--High-grade saturated hydrocarbon
providing internal and external lubrication through its captive metal stearate and wide range of component melting points.
fractions of chloroform bitumen A are mainly composed of n-alkanes, branched alkanes, isoprenoid alkanes, alkyl cyclohexane, cyclic sterane, terpane etc.