Process for manufacturing asphalt
AssigneeShell Oil Company
InventorsJacques Colange, David Strickland
Life of this patent
Estimating the term…
Abstract
A process for manufacturing asphalt is disclosed. The process comprises the steps of: (i) heating bitumen; (ii) heating aggregate; and (iii) mixing the hot bitumen with the hot aggregate in a mixing unit to form asphalt. From 10 to 200 wt % of sulphur, based upon the weight of the bitumen, is added in at least one of the steps (i), (ii) or (iii) and from 0.1 to 20 wt % of a compound of formula A, based upon the weight of the bitumen, is added in at least one of the steps (i), (ii) or (iii). R1 and R2 are independently chosen from C6-C30 alkyl or alkenyl.
Claims9
A process for manufacturing asphalt, the process comprising the steps of:
- (i) heating bitumen, thereby providing hot bitumen;
- (ii) heating aggregate, thereby providing hot aggregate;
- (iii) mixing the hot bitumen with the hot aggregate in a mixing unit to form asphalt;
- wherein from 10 to 200 wt % of sulphur, based upon the weight of the bitumen, is added in at least one of the steps (i), (ii) or (iii),
- and wherein from 0.1 to 20 wt % of a compound of formula A,
- based upon the weight of the bitumen, is added in at least one of the steps (i), (ii) or (iii), wherein R1 and R2 are independently chosen from C6-C30 alkyl or alkenyl,
- and wherein the sulphur and the compound of formula A are added at the same time, the sulphur is in the form of pellets and the compound of formula A is incorporated in the sulphur pellets.
A sulphur pellet comprising a compound of formula A,
- wherein R1 and R2 are independently chosen from C6-C30 alkyl or alkenyl.
Dependencies are inferred from the claim text.