Shell Oil Comapny

Shell Usa, Inc.

Olav Sammelius

Andries Hendrik Janssen

Marcello Stefano Rigutto

Edward Julius Creyghton

Eduard P Kieffer

The present invention provides a process to prepare middle distillates and base oils from a Fischer-Tropsch product, by (a) subjecting the Fischer-Tropsch product to a hydroprocessing step in the presence of a catalyst comprising a molecular sieve with a pore size between 5 and 7 angstrom and a SiO/AlOratio of at least 25, preferably from 50 to 180 and a group VIII metal to obtain a mixture comprising one or more middle distillate fractions and a first residual fraction and a naphtha fraction; (b) separating the mixture as obtained in step (a) by means of atmospheric distillation into one or more middle distillate fractions, a first residual fraction and a naphtha fraction; (c) separating the first residual fraction by means of vacuum distillation into at least a distillate base oil fraction and a second residual fraction.

Process to prepare Fischer-Tropsch derived middle distillates and base oils

The disclosure relates to the conversion of a paraffinic feedstock that comprises at least 50 wt % of compounds boiling above 370&#xb0; c. and which has a paraffin content of at least 60 wt %, an aromatics content of below 1 wt %, a naphthenic content below 2 wt %, a nitrogen content of below 0.1 wt % The process includes:

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Amsterdam, Netherlands

Olav Sammelius