FREMGANGSMAATE FOR KATALYTISK OMVANDLING I MEDSTROEMS FLUIDISERT SJIKT AV EN SATS SOM INNEHOLDER MINST EN OKSYGERT FORBINDELSE

摘要

Process for catalytic conversion in a fluid bed with downward flow, of a feedstock comprising at least one oxygen compound such as methanol, in which at least partially regenerated catalyst which is to be recycled towards the reactor 1 is taken from a dense phase 17a contained in a regenerator 17 and the stage of introduction of the catalyst into the upper part 3 of the reactor 1 is carried out under fluidisation conditions such that the density of the gas-solid suspension thus created is between 50 and 500 kg/m<3> before it comes into contact with the feedstock which is introduced by the injectors 5. This process applies in particular to the production of ethylene and of propylene especially from a feedstock containing methanol.