Method for increasing content of asphaltene in low-asphaltene raw materials
A technology of asphaltene content and asphaltene, which is applied in the direction of processing tar pitch/petroleum pitch/natural pitch by distillation, processing tar pitch/petroleum pitch/natural pitch by chemical methods, and only multi-stage series refining and cracking process treatment, etc. , which can solve the problems of difficult production of SBS modified asphalt and reduction of colloid content
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Embodiment 1
[0025] The deoiled asphalt with an asphaltene content of less than 0.5% is used as the raw material, heated to 390 ℃ by a heating furnace, and then enters a thermal cracking fractionation tower, where it stays for 60 minutes, and the thermally cracked oil is subjected to vacuum fractionation to obtain an atmospheric boiling point greater than 440 ℃. The residue at the bottom of the tower is used as a blending component with high asphaltene content. Its asphaltene content is 6.37%, the gum content is 35.07%, the softening point is 45.8°C, and the penetration is 85 (1 / 10mm), which will account for 74% of the total weight of the base asphalt raw material. % of the blending component is mixed with road asphalt that accounts for 26% of the total weight of the base asphalt raw material to prepare a base asphalt, the base asphalt penetration is 93 (1 / 10mm), and the ductility (15°C, 5cm / min) It is greater than 150cm and the softening point is 48.5℃. The base asphalt meets the technical...
Embodiment 2
[0027] The deoiled asphalt with an asphaltene content of less than 0.5% is used as the raw material, heated to 390 ℃ by a heating furnace, and then enters a thermal cracking fractionation tower, where it stays for 50 minutes, and the thermally cracked oil is subjected to vacuum fractionation to obtain a normal pressure boiling point greater than 450 ℃. The residue at the bottom of the tower is used as a blending component with high asphaltene content. Its asphaltene content is 5.05%, the gum content is 35.85%, the softening point is 45.0°C, and the penetration is 90 (1 / 10mm), which will account for 84% of the total weight of the base asphalt raw material. % of the blended component is mixed with road asphalt that accounts for 16% of the total weight of the base asphalt raw material to form a base asphalt, the penetration of which is 98 (1 / 10mm), and the ductility (15°C, 5cm / min) is greater than 150cm, softening point of 47.2 ℃, the base asphalt meets the technical requirements ...
Embodiment 3
[0029] The deoiled asphalt with an asphaltene content of less than 0.5% is used as the raw material, heated to 400 ℃ in a heating furnace, and then enters the thermal cracking fractionation tower, where it stays for 50 minutes. The bottom residue is used as a high asphaltene content blending component, and its asphaltene content is 8.92%, colloid content is 34.11%, softening point is 51.2°C, and penetration is 71 (1 / 10mm), which will account for 94% of the total weight of matrix asphalt raw materials. % of the blending component and 6% of the total weight of the raw material are mixed with a high aromatic hydrocarbon solvent to prepare a matrix pitch, the penetration is 95 (1 / 10mm), and the ductility (15°C, 5cm / min) is greater than 150cm , the softening point is 48.6 ℃, the base asphalt meets the technical requirements of JTG F40-2004 road petroleum asphalt in the "Technical Specification for Highway Asphalt Pavement Construction" of the Ministry of Communications, so as to mee...
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