Patent ID: 9447334
Filing Date: 2016-09-20
CPC Classification: C10G,C11B,Y02E,Y02P

Claim Text:
1. A process for the production of middle distillate bases, comprising: a) pre-treating of a semi-refined vegetable or animal oil, comprising passing said oil through a reactor comprising at least one fixed bed of at least one adsorbent comprising 100% porous refractory oxide that is optionally activated alumina, or silica-alumina, which porous refractory oxide is free of catalytic metals from group 6 and groups 8 to 12, at a temperature in the range of 130° C. to 320° C., at a pressure in the range of 0.1 to 7 MPa and with a residence time for said oil on said fixed bed in the range of 0.1 to 1 hour; said adsorbent having a macroporous volume, measured by mercury intrusion, of pores with a mean diameter of 500 Å of more than 0.1 ml/g, a total pore volume of more than 0.60 ml/g, and a specific surface area, expressed as the SBET, of 30 m2/g to 320 m2/g, b) hydrotreating, in the presence of at least one fixed bed catalyst, of the pre-treated effluent from a) at a temperature in the range 200° C. to 450° C., at a pressure in the range 1 MPa to 10 MPa, at an hourly space velocity in the range 0.1 h c) separating from the hydrotreated effluent derived from b), of the hydrogen, the gases and at least one middle distillate base, in which said semi-refined vegetable or animal oil is obtained by pre-refining an unrefined vegetable or animal oil before the pre-treatment process, the pre-refining comprising: