Abstract:
This invention describes a moving-bed catalyst reactor having radial flow of the feedstock called moving-bed radial reactor, consisting of 3 zones called upper hemispheric body (III), lateral zone (II), and lower hemispheric body (I), the three zones being connected together by means of flanges.
Abstract:
The reactor 1 that allows continuous regeneration of catalyst consists of a chamber 2 that comprises an oxychlorination zone superposed on a calcination zone equipped with a pipe for introducing calcination gas and a pipe for injecting oxychlorination gas 73. A mixing box is arranged between the oxychlorination zone and the calcination zone, at least one space 85 for catalyst grains to pass being made between the box and the chamber 2, with the mixing box comprising an inner space 80 surrounded by a gas-tight side wall 84, a gas-permeable bottom 83, and a roof 81 that covers the inner space 80. The pipe 73 for introducing oxychlorination gas empties into the inner space 80. The mixing box comprises means 82 for evacuating gas, whereby these means are arranged between said vertical wall 84 and the roof 81.
Abstract:
Device for the mixing and distribution of fluids for a catalytic reactor with a downward flow, said device comprising a collection zone (A), a mixing zone (B) and a distribution zone (C) comprising a distribution plate (12) comprising at least one first zone (C1) supporting a plurality of chimneys (13) and a second zone (C2); said mixing zone (B) is comprised in an annular enclosure (15) situated in the distribution zone (C), said mixing (B) and distribution (C) zones being delimited by at least one annular wall (16) comprising at least one lateral passage section (17a, 17b) suitable for the passage of the fluids from said mixing zone (B) to the first zone (C1) of said distribution zone (C), and the second zone (C2) comprises a plurality of openings (18) suitable for the partial passage of the fluids out of the distribution zone (C).
Abstract:
This invention relates to a collector pipe (8) that is permeable to a gaseous fluid and able to retain particles having a dimension that is greater than a minimum dimension, in which the cross-section of said pipe is a convex polygon having at least three sides.
Abstract:
The invention describes a radial bed catalytic conversion unit having an outer cylindrical chamber (1), an inner chamber (2) which is also cylindrical, the annular zone included between the outer chamber and the inner chamber, termed the reaction zone (1), being filled with catalyst under slow gravitational flow, and the feed being introduced via an inlet pipe (E), connected to an intermediate box (F) which is in turn connected to a plurality of distribution tubes (3) disposed inside the reaction zone (I) in the vicinity of the outer chamber (1).
Abstract:
The reactor 1 for continuously regenerating grains of catalyst is composed of a vessel 2 containing an oxychlorination zone 72 positioned above a calcining zone 75 provided with a line for introducing calcining gas 76, the reactor containing an oxychlorination gas injection line 73 opening into the bottom of the oxychlorination zone 72 and a gas evacuation line 74b at the head of the oxychlorination zone, characterized in that the oxychlorination zone 72 contains at least one deflector means 82 for deflecting the flow of grains of catalyst.
Abstract:
The invention relates to a device for the upflow of a single-phase fluid comprising at least two beds of solid particles and at least one bypass means for a portion of said fluid, and also to the use thereof.
Abstract:
A method for hydrotreatment of a vacuum-distillate-type hydrocarbon feedstock that contains sulfur and nitrogen compounds is described, with said method for hydrotreatment of a vacuum-distillate-type feedstock comprising a specific concatenation of catalysts that makes it possible to increase the overall activity and the overall stability of the method.
Abstract:
Device for the mixing and distribution of fluids for a catalytic reactor with a downward flow, said device comprising at least one collection zone (A), at least one mixing zone (B) comprising at least one enclosure (15) for the mixing of the fluids, at least one distribution zone (C), characterized in that said mixing zone (B) is situated at the same level as the distribution zone (C) and also comprises at least one enclosure (16) for the exchange of the fluids, connected to, and communicating with, said mixing enclosure (15), said exchange enclosure (16) comprising at least one lateral passage section (17a, 17b) suitable for the passage of the fluids from said exchange enclosure (16) to said distribution zone (C).
Abstract:
The invention concerns a collector assembly (8) for a gaseous fluid suitable for being disposed in a reaction section with a moving bed of catalyst of a radial reactor. The collector assembly comprises a vertical cylindrical screen (9), permeable to gas and impermeable to particles of catalyst, and a vertical cylindrical tube (10) which is supported by this screen (9) and disposed in a concentric manner with respect to the screen. The tube (10) comprises one or more zones (17a, 17b) which are permeable to gaseous fluid, comprising a plurality of through holes and a plurality of zones (18a, 18b, 18c, 18d) with a reduced permeability to gaseous fluid compared with the permeable zone. Each zone with a reduced permeability has a porosity, defined as the ratio between total permeable surface area of the zone and total developed surface area of this zone, in the range 0 to 0.005.