摘要:
A process for catalytic reforming and for producing aromatics is carried out in the presence of a catalyst comprising at least one support, at least one metal from group VIII of the periodic table and at least one additional element M selected from the group formed by germanium, tin, lead, rhenium, gallium, indium, and thallium. The process is characterized in that the catalyst is prepared using a process in which said metal M is introduced in an aqueous solvent in the form of at least one organometallic compound comprising at least one carbon-M bond.
摘要:
The invention relates to a process for the production of aromatic compounds from a hydrocarbon fraction with a catalyst the preferably circulates in a moving bed. In the process, a hydrocarbon feedstock that is treated by a hydrogen-rich gas is transformed. In a particular embodiment, regenerative reforming is conducted, such as for production of BTX (butene, toluene, xylenes) with continuous regeneration of the catalyst. The invention also pertains to the related device for carrying out the process.
摘要:
A moving bed process for producing aromatic compounds comprises at least a first step in which principally naphthene dehydrogenation is carried out in the presence of hydrogen in a mole ratio (H2)1/(HC), said step being followed by at least one subsequent step carried out at a mole ratio (H2)2/(HC)2, the process also comprising reducing the catalyst with hydrogen in a ratio (H2)red/(HC). In accordance with the invention, (H2)1/(HC)+(H2)red/(HC)≦(H2)2/(HC)2, (HC) representing the molar quantity of feed in the first step and (HC)2 that of the subsequent step, or (H2)1/(HC)+(H2)red/(HC)>(H2)2/HC2, but where (H2)1/(HC) is less than (H2)2/(HC)2. Particular application to reforming.
摘要:
In a process for preparing a catalyst comprising at least one support, at least one metal from group VIII of the periodic table and at least one additional element M selected from the group formed by germanium, tin, lead, rhenium, gallium, indium and thallium, metal M is introduced in an aqueous solvent in the form of at least one organometalic compound comprising at least one carbon-M bond.
摘要:
The invention concerns a process for isomerizing a feed containing essentially hydrocarbons, preferably paraffins containing principally 4 to 8, preferably principally 4 to 6 and more preferably principally 5 and/or 6 carbon atoms per molecule, comprising a fractionation zone and at least two isomerization reaction zones, said process comprising carrying out the following steps: (1) sending the feed to a fractionation zone; (2) drawing off at least a portion of the liquid circulating in said zone, via at least two draw-off levels; (3) sending the major portion of the liquid drawn off in step (2) to at least two isomerization zones, each isomerization zone being associated with a draw-off level; (4) sending the major portion of the effluents from step (3) to the fractionation zone, substantially adjacent to the draw-off levels; (5) recovering an effluent from the fractionation zone.