Method for the transportation and/or storage of road bitumen
View Patent ↗A process for the transportation and/or storage of road bitumen under cold conditions, including at least one chemical additive chosen from: a general formula compound (I): R 1 —(COOH) z wherein R 1 is a linear or branched, saturated or unsaturated hydrocarbon-based chain including 4 to 68 carbon atoms, and z is an integer ranging from 1 to 4, and a general formula compound (II): R—(NH) n CONH—(X) m —NHCO(NH) n —R′ wherein: R and R′, which are identical or different, contain a saturated or unsaturated, linear or branched, cyclic or acyclic hydrocarbon-based chain having 1 to 22 carbon atoms and optionally including heteroatoms and/or rings having 3 to 12 atoms and/or heterocycles having 3 to 12 atoms; X contains a saturated or unsaturated, linear or branched, cyclic or acyclic hydrocarbon-based chain having 1 to 22 carbon atoms and optionally including one or more heteroatoms and/or rings having 3 to 12 atoms and/or heterocycles having 3 to 12 atoms.
1. Process for the transportation and/or storage of road bitumen under cold conditions, said process comprising:
providing a road bitumen in block form, and
transporting, and/or storing the road bitumen,
wherein said road bitumen consists essentially of:
at least one bitumen base,
between 0.1% and 7.5% by weight of at least one chemical additive chosen from:
a compound of general formula (I): R 1 —(COOH) z wherein R 1 is a linear or branched, saturated or unsaturated hydrocarbon-based chain comprising from 4 to 68 carbon atoms, and z is an integer ranging from 1 to 4, or
a compound of general formula (II): R—(NH) n CONH—(X) m —NHCO(NH) n —R′ wherein:
R and R′, which are identical or different, contain a saturated or unsaturated, linear or branched, cyclic or acyclic hydrocarbon-based chain having from 1 to 22 carbon atoms and optionally comprising heteroatoms and/or rings having from 3 to 12 atoms and/or heterocycles having from 3 to 12 atoms;
X contains a saturated or unsaturated, linear or branched, cyclic or acyclic hydrocarbon-based chain having from 1 to 22 carbon atoms and optionally comprising one or more heteroatoms and/or rings having from 3 to 12 atoms and/or heterocycles having from 3 to 12 atoms;
n and m are integers having, independently of one another, a value of 0 or of 1, and
optionally, between 0.05% and 15% by weight of an olefinic polymer adjuvant,
the percentages being given by weight with respect to the total weight of bitumen,
wherein a ring and ball softening temperature (RBT) of the bitumen is greater than 69° C., and a penetrability of the bitumen is of between 20 and 45 1/10 mm, where the RBT is measured according to standard EN 1427, and the penetrability is measured at 25° C. according to standard EN 1426, and
wherein the bitumen block is not packaged or is packaged in a material selected from the group consisting of a box having a silicone-based inner wall, and a thermoplastic film.
2. Process according to claim 1 , wherein said road bitumen is transported and/or stored at a temperature of less than 100° C.
3. Process according to claim 1 , wherein said road bitumen is transported and/or stored at an ambient temperature of between 20° C. and 90° C.
4. Process according to claim 1 , wherein the chemical additive is a compound of general formula (I): R 1 —(COOH) z wherein R 1 is a linear or branched, saturated or unsaturated hydrocarbon-based chain comprising from 4 to 68 carbon atoms, and z is an integer ranging from 1 to 4.
5. Process according to claim 4 , wherein said compound is a diacid of general formula HOOC—C w H 2w —COOH, wherein w is an integer ranging from 4 to 22.
6. Process according to claim 4 , wherein said compound is a diacid chosen from the group consisting of adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecanedioic acid, 1,2-dodecanedioic acid and tetradecanedioic acid.
7. Process according to claim 1 , wherein the chemical additive is a compound of general formula (II): R—(NH) n CONH—(X) m —NHCO(NH) n —R′ wherein:
R and R′, which are identical or different, contain a saturated or unsaturated, linear or branched, cyclic or acyclic hydrocarbon-based chain having from 1 to 22 carbon atoms and optionally comprising heteroatoms and/or rings having from 3 to 12 atoms and/or heterocycles having from 3 to 12 atoms;
X contains a saturated or unsaturated, linear or branched, cyclic or acyclic hydrocarbon-based chain having from 1 to 22 carbon atoms and optionally comprising one or more heteroatoms and/or rings having from 3 to 12 atoms and/or heterocycles having from 3 to 12 atoms;
n and m are integers having, independently of one another, a value of 0 or of 1.
8. Process according to claim 7 , wherein said compound comprises a hydrazide unit when n and m have a value of 0.
9. Process according to claim 8 , wherein said R and/or R′ groups, which are identical or different, comprise one or more aromatic monocyclic or polycyclic rings or heterocycles, optionally substituted by one or more hydroxyl functions and/or one or more saturated, linear or branched hydrocarbon-based chains, having from 1 to 6 carbon atoms.
10. Process according to claim 7 , wherein said compound comprises two amide units when n has a value of 0 and m has a value of 1.
11. Process according to claim 7 , wherein said R and/or R′ groups, which are identical or different, comprise an aliphatic hydrocarbon-based chain having 4 to 22 carbon atoms.
12. Process according to claim 11 , wherein said aliphatic hydrocarbon-based chain is chosen from the groups C 4 H 9 , C 5 H 11 , C 9 H 19 , C 11 H 23 , C 12 H 25 , C 17 H 35 , C 18 H 37 , C 21 H 43 , C 22 H 45 .
13. Process according to claim 7 , wherein said X group comprises an aliphatic hydrocarbon-based chain having 1 to 2 carbon atoms.
14. Process according to claim 1 , wherein the road bitumen comprises from 0.1% to 5% by weight of said chemical additive relative to the total weight of said bitumen.
15. Process according to claim 14 , wherein the road bitumen comprises from 0.5% to 4% by weight of said chemical additive relative to the total weight of said solution.
16. Process according to claim 1 , wherein the road bitumen comprises between 0.05% and 15% by weight of the olefinic polymer adjuvant.
17. Process according to claim 16 , wherein the road bitumen comprises between 0.1% and 10% by weight of the olefinic polymer adjuvant.
18. Process according to claim 1 , wherein the penetrability of the bitumen is of between 20 and 37 1/10 mm.
19. Process according to claim 18 , wherein the penetrability of the bitumen is of between 25 and 37 1/10 mm.
20. Process according to claim 1 , wherein the ring and ball softening temperature (RBT) is greater than 90° C.
21. Process according to claim 1 , wherein the road bitumen maximum compressive force is at least equal to 15 N at 50° C.
22. Process according to claim 1 , wherein said road bitumen is transported and/or stored at a temperature of between 40° C. and 80° C.
23. Process according to claim 1 , wherein the bitumen block is not packaged.
24. Process according to claim 1 , wherein the bitumen block is packaged in a box having a silicone-based inner wall.
25. Process according to claim 1 , wherein the bitumen block is packaged in a thermoplastic film.