Charts for Petroleum Waxes
Charts for Petroleum Waxes
Melting Points and Specific Gravities of Wax Hydrocarbons
The values given below show the relation between the molecular weight, expressed as the number of carbon atoms, and the melting points and specific gravities for (a) normal paraffin hydrocarbons, and (b) petroleum ozokerire hydrocarbons. The latter contain a large proportion of branched -chain paraffins, to which are attributed the oil absorptive characteristic of ozokerite. The values are based upon the data of Sakhanov.
Number of Carbons | Melting Point (°C) | Specific Gravity | |||
---|---|---|---|---|---|
(a) | (b) | (a) | (b) | ||
C20 | 37 | - | 0,734 | - | |
C25 | 54 | 29 | 0.748 | 0.777 | |
C30 | 66 | 39 | 0.759 | 0.779 | |
C35 | 74 | 50 | 0.767 | 0.782 | |
C40 | 81 | 60 | 0.773 | 0.784 | |
C43 | 85 | 67 | 0.781 | 0.785 | |
C50 | 92 | 81 | - | 0.786 | |
C54 | 95 | 90 | - | 0.787 |
Viscosity (in Poises) of n-Hydrocarbns
The values given below are for liquid hycrocarbons near their freezing points, by Gillerand Driekamer; paraffin wax hydrocarbons C21 to C36, by Mazee; and miscellaneous C36 to C53 n-hydrocarbons associated with ceresins.
Liquid | Paraffin | Ceresin | ||||
---|---|---|---|---|---|---|
C5 | 0,00232 | C21 | 0.0181 | C37 | 0.0700 | |
C6 | 0.00310 | C23 | 0.0220 | C40 | 0.0790 | |
C7 | 0.00410 | C24 | 0.0242 | C43 | 0.0872 | |
C8 | 0.00539 | C28 | 0.0340 | C50 | 0.0940 | |
C10 | 0,00907 | C30 | 0.0404 | C53 | 0.1000 | |
C12 | 0.0149 | C31 | 0.0437 | |||
C14 | 0.0220 | C34 | 0.0514 | |||
C35 | 0.0557 | - | ||||
C36 | 0.0580 | - |
Melting Points vs. Molecular Weight
Number of Carbons | Molecular Weight | Melting Ponits (°C) | ||
---|---|---|---|---|
n-Ling-chain Hydrocarbons | Branched-chain Hydrocarbons (av.) | |||
C20 | 282.54 | 37 (98.6°F) | ||
C25 | 352.67 | 54 (129.2°F) | 29 (84.2°F) | |
C30 | 422.80 | 66 (150.8°F) | 39 (102.3°F) | |
C35 | 492.92 | 74 (165.2°F) | 50 (122.0°F) | |
C40 | 562.06 | 81 (177.8°F) | 60 (140.0°F) | |
C44 | 619.16 | 88 (190.4°F) | 68 (154.4°F) | |
C50 | 703.32 | 92 (197.6°F) | 81 (177.8°F) | |
C54 | 759.42 | 95 (203.0°F) | 90 (194.0°F) |