TECHNOLOGY FOR WAXMAKING FROM COAL TAR

Abstract

Abstract: The light oil from middle and low temperature coal tar was used to make wax by hydrofining and then solvent dewaxing process. The effect of reaction temperature，pressure，LHSV on the properties and content of paraffin of the waxes were investigated using three hydrofining reactors in series. The melting point and content of n-alkanes of the waxes obtained by solvent dewaxing process were determined. The optimal reaction conditions of the process are as follows：reaction temperature of 380 ℃，reaction pressure 13 MPa，LHSV 0.3 h-1, the ratio of ketone-benzene and solvent-oil is 8:1 and 5:1，respectively. The final wax product has a melting point of 50.7℃，n-alkane content of 93.7%.

Key words: coal tar, hydrofining, wax, n-alkane

References

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