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)