Brief description of the hydrotreatment and hydroisomerization of charges from the biomass in which the effluent to hydrotreating and the flow of 1996 contain a content of carbon monoxide limited

摘要

It describes a process for the production of middle distillates from a load comprising at least a fraction of the load from a single source, said process comprising at least: a) a hydrotreatment step in which said load is placed in contact with a hydrotreatment catalyst in a fixed bed, said catalyst comprising a water-soluble - dehydrogenating function and an amorphous support, b) a step of separation of at least a portion of the effluent from step a) in at least one gaseous fraction comprising hydrogen, at least of the co and of the co and the compounds c4 -, and at least one hydrocarbon liquid effluent, c) a step for hydroisomerisation of at least a portion of the hydrocarbon liquid effluent from step b), in the presence of a hydroisomerisation catalyst in a fixed bed, d) a fractionation step of the effluent from step c) in order to obtain at least one middle distillate fraction, a process in which it returns to step a) at least a portion of the gaseous fraction separated in step b), the gaseous fraction transmitted in step a) comprising a co content of between 0% and 3% by volume.