Reactor for continuous catalyst regeneration with a perforated box for mixing and distributing gases in the oxychlorination zone

A process for catalytic reforming of a hydrocarbon feedstock, comprising, in a reactor (1) for continuous regeneration of catalyst grains, comprising a chamber (2) that comprises an oxychlorination zone (72) superposed on a calcination zone (75) that is equipped with a pipe introducing calcination gas, a box (80) placed between the oxychlorination zone and the calcination zone, with the box (80) having an inner space (86) that is located between an upper tray (81) and a lower tray (82), with the upper tray (81) being gas-tight and sealed against catalyst grains, and with the lower tray (82) being provided with openings (89), the box (80) being separated by a height H from the calcination zone (75) by a mixing zone (87) that extends over said height H, a number of tubes (85) passing through the box, allowing the catalyst grain to pass from the oxychlorination zone into the calcination zone, with the tubes (85) extending over the height H of the mixing zone (87), a number of gas passages (83) passing through the box from the mixing zone to the oxychlorination zone, the reactor comprising at least one pipe (73) injecting oxychlorination gas emptying into the inner space (86), each gas passage (83) comprising a gas evacuation device (84) in the oxychlorination zone, with the gas evacuation device being permeable to gas and impermeable to catalyst grains,

• introducing a stream of catalyst grains at the top of the oxychlorination zone,
• introducing a stream of calcination gas via the pipe for introducing calcination gas,
• introducing a stream of oxychlorination gas via the pipe for injecting oxychlorination gas,
• introducing a stream of gas at the top of the oxychlorination zone,
• introducing a stream of catalyst grains is evacuated at the bottom of the calcination zone.