COMPOUNDED BITUMEN MANUFACTURE PROCESS Russian patent published in 2002 - IPC

FIELD: petroleum processing. SUBSTANCE: in a method of production of compounded bitumen by mixing of oxidized bitumen, prepared by elevated-temperature oxidation of residual petroleum processing products, with non-oxidized residual petroleum products, the first stage of process consists in preparing goudron-slop mixture or goudron-bitumen mixture by agitation of components for 10-15 min at 120-140 C. Resulting blend is then mixed with oxidized bitumen or slop for 20-25 min: 0.5- 16% goudron, 1-18% slop, and oxidized bitumen - to 100%. Invention also provides slop-distillate fraction 480-610 C/10-20 mm Hg. EFFECT: reduced Fraas brittle temperature from -17 to -34-35 C, extended assortment of commercial bitumens, and reduced by 25-30 C temperature range for production of compounded bitumen. 2 cl, 2 tbl