Institut Francais Du Pe'trole

Compagnie Generale Des Matieres Nucleaires

Compagnie De Raffinage Et De Distribution Total France

Societe Fluidbi

Renaud Pontier

Frederic Hoffmann

Thierry Gauthier

Regis Bonifay

Pierre Galtier

Nicolas Durupt

Pietro Bilardello

Eric Benazzi

Jean-Francois Le Page

Christian Marcilly

Jean-Francois Joly

Gerard Martin

Sigismond Franckowiak

Jean-Louis Mauleon

Patrick Leroy

Alain Feugier

Daniel Vuillemot

Mariano Del Pozo

Gerard Courteheuse

Jean Paul Euzen

Jean-Paul LePage

Jean-Paul Lepage

Jean-Bernard Siguad

Marcelin Espeillac

Hervee Hellio

Marcellin Espeillac

An apparatus and a process for catalytic cracking of a hydrocarbon feed is described, carried out in at least two reaction zones, one () operating in catalyst riser mode, wherein the feed and catalyst from regeneration zone () are circulated from bottom to top, the first gases produced are separated from the coked catalyst in a first separation zone (), the catalyst is stripped (), a first cracking and stripping effluent () is recovered and the coked catalyst is recycled () to the regeneration zone. Catalyst () from regeneration zone () and a hydrocarbon feed () are introduced into the upper portion of a dropper reaction zone (), the catalyst and feed being circulated from top to bottom, the coked catalyst is separated from the second gases produced in a second separation zone (), the second gases () produced are recovered and the coked catalyst is recycled () to the regeneration zone.

Method and device for catalytic cracking comprising in parallel at least an upflow reactor and at least a downflow reactor

A gas siphon type reactor () is used to carry out a three phase chemical reaction under pressure, such as the reduction of uranyl nitrate to uranous nitrate by hydrogen, in the presence of a catalyst made up of platinum on a silica carrier. The control of the pressure in the reactor () is provided by regulating the liquid and gas flow rates from separator (), into which the liquid and the gas leaving the reactor () are routed. The liquid in the reactor () is tapped from a lateral branch pipe () fitted with a filter () and emerging in the upper area (), behind a profiled wall ().

Installation for carrying out a three phase chemical reaction under pressure

A gas siphon type reactor ( ) is used to carry out a three phase chemical reaction under pressure, such as the reduction of uranyl nitrate to uranous nitrate by hydrogen, in the presence of a catalyst made up of platinum on a silica carrier. The control of the pressure in the reactor ( ) is provided by regulating the liquid and gas flow rates from a high pressure separator ( ), into which the liquid and the gas leaving the reactor ( ) are routed. The liquid in the reactor ( ) is tapped from a lateral branch pipe ( ) fitted with a filter ( ) and emerging in the upper area ( ), behind a profiled wall ( ).

Method and installation for carrying out a three phase chemical reaction under pressure

Method and device for descending catalytic cracking by injecting

A vessel, in which a chemical reaction is carried out in the presence of a catalyst, comprises a bed (4) of solid catalytic particles, delimited by at least one wall (1, 10, 11) and a base (2). The base comprises at least one gravity extraction device (3) for the particles and a succession of ridges and hollows forming pleats. The ridges and hollows are oriented towards the extraction device. This succession is advantageously formed by an assembly of facets, which are preferably trapezoidal. The invention has particular application to mobile bed reactors, in particular those used for catalytic reforming of petroleum cuts.

Vessel with improved solid particle extraction

Thermal regulation process for a solid in a heat exchanger using

A catalyst, e.g., a cracking catalyst, and a part of the regeneration fumes are drawn off from the dense catalytic bed of a second regenerator (9) and are introduced by force of gravity into an external exchanger (21) at a junction point beneath the level of the dense bed of the second regenerator. The heat exchange takes place in the bottom part of the exchanger below the junction point. Between the bottom end of the exchanger and the region above the junction point a dense bed zone is formed at a level which is substantially at the height of the dense bed in the regenerator and a discharge zone (27), of suitable size, for the regeneration gases and fluidization gas. The gases and fumes from the exchanger are removed in the diluted fluidized phase from the second regenerator through a conduit (28), while the catalyst is recycled into the bed of the first regenerator through a conduit (34).

Heat exchange apparatus for solid particles for double regeneration in

The invention relates to a process for catalytic cracking and the associated apparatus in which the cracking reaction takes place in two substantially vertical and successive reaction zones, the loads being introduced into the first zone where it circulates from the top downwards, then at least a part of the product obtained is introduced into a second reaction zone in which it circulates in an ascending fashion. A supplementary hydrocarbonated phase is advantageously introduced into the product entering the second zone. The invention applies particularly to heavy loads, with a U-shaped apparatus.

Process for and apparatus for catalytic cracking in two successive

The invention relates to a downflow fluid cracking process and apparatus, particularly suitable for use in the catalytic cracking of heavy hydrocarbon charges. More specifically, removal of at least partly regenerated catalyst, which must be recycled to the reactor 1 from a dense phase 17a contained in a regenerator 17, and the introduction of the catalyst into the upper part 3 of the reactor 1 takes place under conditions such that the density of the thus formed gas-solid suspension is between 80 and 500 kg/m.sup.3 prior to its contacting with the charge, which is introduced by the injectors 5.

Downflow fluid catalytic cracking process and apparatus

The invention relates to an alkylation process, in which a charge incorporating at least one isoparaffin and at least one olefin containing 2 to 6 carbon atoms per molecule, is treated in the presence of a solid alkylation catalyst. In the process, catalyst present in a reaction R is contacted with the charge, recycled liquid effluent discharged from reaction zone R and liquid effluent discharged from an isobutane/n-butane/alkylate separation zone S. The process uses a specific catalyst, e.g., sulfuric acid impregnated on a porous support.

Process for the alkylation of paraffins

The invention relates to a downflow fluid cracking process and apparatus. More specifically, sampling takes place of the at least partly regenerated catalyst, which must be recycled to the reactor 1 from a dense phase 17a, contained in a regenerator 17 and the stage of introducing the catalyst into the upper part 3 of the reactor 1 takes place under conditions such that the density of the thus formed gas-solid suspension is between 80 and 500 kg/m.sup.3 prior to its contacting with the charge, which is introduced by the injectors 5.

A catalyst, e.g., a cracking catalyst, and a part of the regeneration fumes are drawn off from the dense catalytic bed of a second regenerator (9) and are introduced by force of gravity into an external exchanger (21) at a junction point beneath the level of the dense bed of the second regenerator. The heat exchange takes place in the bottom part of the exchanger below the junction point. Between the bottom end of the exchanger and the region above the junction point a dense bed zone is formed at a level which is substantially at the height of the dense bed in the regenerator and a discharge zone (27), of suitable size, for the regeneration gases and fluidization gas. The gases and fumes from the exchanger are removed in the diluted fluidized phase from the second regenerator through a conduit (28), while the catalyst is recycled in to the bed of the first regenerator through a conduit (34).

Process and heat exchange apparatus for solid particles for double

A process and apparatus for the heat regulation of fluidized or fluid catalyst beds are described, the apparatus having a fluid bed heat exchanger. According to the invention, a pulverulent solid is made to flow essentially from the base of an enclosure (1) into a heat exchanger (6) having an internal separating partition (22) which defines two elongated, adjacent compartments (23, 24) communicating at their lower part. In the compartment in which the pulverulent solid flows downwards, the fluidization speed or rate is between 0.1 cm to 2 m/s, whereas in the compartment wherein the pulverulent solid rises again into the heat exchanger (6), the fluidization speed is between 0.1 and 6 m/s. The invention can be used for refining reaction (e.g., catalytic reforming), for the regeneration of a fluidized bed catalytic cracking catalyst of a petroleum or oil charge, or for the combustion of coal.

Process for regulating or checking the thermal level of a pulverulent

A catalyst regeneration process effected in an apparatus which comprises two regeneration chambers, a heat exchanger, means for withdrawing from the second chamber a controlled fraction of hot catalyst for the purpose of maintaining the temperature in that chamber substantially at a first desirable value of less than 950.degree. C., and preferably at 910.degree. C., means for transferring this fraction of hot catalyst to the heat exchanger for the purpose of cooling it, means for the discharge of the cooled catalyst from the heat exchanger and the reinjection of the cooled catalyst into the first chamber, and means, controlled by the means for measuring the temperature in the first chamber, for regulating the supply of combustion fluid to the first chamber for the purpose of maintaining said temperature substantially at a second desired value lower than 730.degree. C. and preferably ranging from 650.degree. to 710.degree. C.

Process for fluidized-bed catalyst regeneration

The present invention provides an exchanger and a method for achieving heat transfer between solid particles contained in an enclosure and the external environment.

Growing community of inventors

Vienne, France

Renaud Pontier