Abstract: A dynamic viscoelastic vibration neutralizer for industrial pipes includes a metallic housing, to which the shaft supports are fixed, by screws. The supports of the viscoelastic pieces and the supports of the housing itself, allow the junction of the device with the system to be controlled. An oscillating mass, fixed in the center of a metallic shaft, is supported by the shaft supports. two sets of viscoelastic pieces, are fixed by one of their ends to the supports of the viscoelastic pieces and by the other to the oscillating mass.

Abstract: A “TUNABLE VISCOELASTIC NEUTRALIZER WITH OSCILLATING MASS ON SHAFT FOR CONTROL OF VIBRATIONS IN PIPES IN GENERAL” is a dynamic viscoelastic vibration neutralizer for industrial pipes, consisting of a metallic housing (CAR), to which the shaft supports (SE1 and SE2) are fixed, by means of the use of the screws (PF1, PF2, PF3, PF4, PF5 and PF6), the supports of the viscoelastic pieces (SM1 and SM2) and the supports of the housing itself (SC1, SC2, SC3 and SC4), which allow the junction of the device with the system to be controlled; an oscillating mass (MAS), fixed in the center of a metallic shaft (EIX), which is supported by the shaft supports (SE1 and SE2); and two sets of viscoelastic pieces (MV-1 and MV-2), which are fixed by one of their ends to the supports of the viscoelastic pieces (SM1 and SM2) and by the other to the oscillating mass (MAS).

Abstract: The present invention relates to a device and respective process for distribution of mixed charges comprising a flat tray in the form of a disc drained by a series of drainage tubes located above the surface of fixed beds of catalysts, capable of promoting the homogenisation and distribution of charges by means of said device. Such drainage tubes mounted in said manner have the objective of restricting and reorienting the flow of mixed charges, multiplying the points whereon they fall, principally of the liquid phase, onto said beds of catalysts. For the purpose of doing so said drainage ducts, being segments of tubes, distributed on the entire surface of said tray possess caps affixed at the upper extremity thereof impeding the direct flow of charge onto the bed of catalyst, creating a reservoir of liquid on the tray, subsequently being drained down such device in a more controlled manner.

Abstract: An apparatus for downflow fluid catalytic cracking is described, which comprises a regenerated catalyst riser carrying regenerated catalyst and a carrying fluid, those being directed through a crossover section to a distributor that will centrifuge gas and separate catalyst from carrying fluid, the catalyst being directed to a downflow reactor through a distributing basket provided with perforations. The upper part of the reactor is provided with feed injectors, which atomize the feed so that feed vaporization and feed and catalyst admixture is optimized. After the cracking reaction in downflow reactor, reaction products are separated and spent catalyst is directed to stripping and regeneration sections. The FCC process carried out in the apparatus is also described.

Abstract: An apparatus for downflow fluid catalytic cracking is described, which comprises a regenerated catalyst riser carrying regenerated catalyst and a carrying fluid, those being directed through a crossover section to a distributor that will centrifuge gas and separate catalyst from carrying fluid, the catalyst being directed to a downflow reactor through a distributing basket provided with perforations. The upper part of the reactor is provided with feed injectors, which atomize the feed so that feed vaporization and feed and catalyst admixture is optimized. After the cracking reaction in downflow reactor, reaction products are separated and spent catalyst is directed to stripping and regeneration sections. The FCC process carried out in the apparatus is also described.

Abstract: A process for the fluid catalytic cracking of heavy feeds under a heat balance regime is described, where one or more catalyst coolers external to the regenerator cool a stream of regenerated catalyst. A portion of said stream returns to the regenerator and a portion of the cooled regenerated catalyst is admixed to the non-cooled regenerated catalyst at a temperature substantially lower than the regenerator temperature, said admixture being brought into contact with the hydrocarbon feed to be cracked. As a result, the control of the catalyst circulation is rendered independent from the heat balance of the unit, with minimization of the thermal cracking, and therefore lower coke and fuel gas products.