Method of hydrocracking and oligomerizing a paraffinic product of Fischer-Tropsch synthesis using a dispersed zeolite beta based catalyst

摘要

A process for the production of middle distillates comprising at least one hydrocracking stage that oligomerizes a paraffinic feedstock produced by Fischer-Tropsch synthesis, the process using a catalyst that comprises at least one hydrogenating-dehydrogenating metal that is selected from the group that is formed by the metals of group VIB and group VIII of the periodic table, by themselves or in a mixture, and a substrate that comprises a beta zeolite in the form of crystallites with a mean size that is less than 100 nm dispersed in at least one porous mineral matrix, whereby the beta zeolite has a mesopore volume of less than 0.4 ml/g.

主权项

1. A process for the production of middle distillates, said process comprising at least one hydrocracking stage that oligomerizes a paraffinic feedstock produced by Fischer-Tropsch synthesis, by contacting said feedstock with a catalyst that comprises at least one hydrogenating-dehydrogenating metal of group VIB or group VIII of the periodic table, alone or in a mixture, and a substrate that comprises a beta zeolite in the form of crystallites with a size that is less than 100 nm dispersed in at least one porous mineral matrix, whereby said beta zeolite has a mesopore volume of less than 0.4 ml/g, said feedstock comprising an n-paraffin content that is greater than 60% by weight relative to the total mass of said feedstock, a content of oxidized products that is less than 10% by weight, a content of unsaturated products, less than 20% by weight, and a content of iso-paraffins, less than 10% by weight relative to the total mass of said feedstock.