Abstract: A device, system and method of mixing two fluids are described herein. A gaseous first fluid is distributed through a distribution zone to a mixing zone by a bundle of pipes parallel to an axis inside which the first fluid is uniformly distributed. A second fluid is uniformly distributed outside the pipes in the distribution zone. The mixing zone is separated from the distribution zone by a pipe-plate supporting the pipes. The pipe-plate has slits or openings to uniformly discharge the second fluid in an axial flow direction into the mixing zone. The pipes extend beyond the pipe-plate into the mixing zone to partialize an outlet flow of the first fluid. In one aspect, the pipes have different lengths to partialize the outlet flow. In another aspect, a terminal portion of the pipes partializes the outlet flow axially, radially, transversally or a combination thereof in the mixing zone.

Abstract: A device is described for mixing two fluids, inserted in or combined with a reactor, which can also be used for catalytic partial oxidation, substantially consisting of the following zones:—a first feeding zone equipped with means for allowing a first fluid, possibly gaseous under the operating conditions, to enter in an axial direction;—an underlying distribution zone containing a bundle of pipes preferably parallel to the axis inside which said fluid is uniformly distributed;—a second feeding zone equipped with means for allowing a second fluid to enter the distribution zone containing the bundle of preferably parallel pipes and to be uniformly distributed outside said parallel pipes;—a mixing zone separated from the distribution zone by a pipe-plate supporting said parallel pipes, said pipe-plate having slits or openings in order to uniformly discharge the second fluid in an axial direction into the mixing area, and said parallel pipes extending beyond said pipe-plate into the mixing zone.

Abstract: Mixtures of bitumen and thermoplastic polymer stable to storage are prepared by a process comprising:(i) mixing a bituminous product having a content of total asphaltenes, resins, saturated and aromatic products which satisfies the condition that the I.sub.c value is between 0.200 and 0.270 in the expression:I.sub.c =(C7+C5+S)/(A+R)with a thermoplastic polymer, the reaction being carried out at a temperature of between 160.degree. C. and 200.degree. C. and for a time of between 15 and 120 minutes and(ii) diluting the bituminous composition obtained in (i) with a bitumen or bituminous component having an I.sub.c defined as specified above in (i) of between 0.270 and 0.700 in such a quantity that the final concentration of the polymer is between 2.5 and 15% by weight, and heating to a temperature of between 160.degree. C. and 200.degree. C. for a time of between 30 and 90 minutes.