Abstract: Factors influencing the odor of petroleum wax product and the chemical compositions of the materials which give odor of waxes produced in SINOPEC Jinan Company were discussed. According to quantitative analysis results of volatiles and identification thresholds of odor materials, the toluene and cyclohexane are determined as the main compounds from ketone-benzol dewaxing process and lube oil hydrofining process, which cause the odor of wax. The steam stripping under vacuum condition technology for deodorization was adopted based on the experiments and theoretical analysis. By the process, fully refined wax product with the odor less than 1.0 can be stably produced.

Key words: petroleum wax, odor, toluene, deodorization process