Preparation of modified oil road bitumen

Abstract

The aim of this work is to study the possibility of developing oil road bitumen by goudron oxidation of mixed base oils with the softening temperature of 24 °C from the Martyshi and Mangistau deposits using vacuum residue of more than 450 °C of highly resinous oil from the Karazhanbas deposit of the Republic of Kazakhstan as an additive, elemental sulfur modifier and induction moments. Karazhanbas oil has a high content of oil tars (24.18 % wt.) and asphaltenes (4.85 % wt.). The oxidation of goudron and vacuum residue of highly resinous oil was carried out in a bubble reactor when thermostating at 200 - 210 °С, specific air consumption of 1.8 – 2 l/min·kg. The oxidation process of the feedstock was completed when the viscosity of bitumen was reached by the ring-andball method of 32-35 °C. Oil bitumen was obtained with the following technological characteristics: penetration at 25 °C 105 mm, melting point 51 °C, tensibility at 25 °C 67 cm, flash point 230 °C, brittle temperature minus 15 °C.