Slurry reactor system for upgrading feedstock

A slurry reactor system, comprising:

• a slurry reactor configured to convert, under slurry hydroconversion conditions, a slurry reactor content flowing upwards and comprising a feedstock comprising one or more of fats, oils and greases, a slurry hydroconversion catalyst and a hydrogen stream to a slurry hydroconversion effluent comprising a slurry phase effluent comprising catalyst particles and liquid product and a vapor phase effluent comprising a hydroconversion product;
• and
• a separation unit external to the slurry reactor, the separation unit being configured to separate the slurry phase effluent from the vapor phase effluent to produce a slurry recycle stream;
• wherein an inlet of the separation unit is in fluid communication with an outlet of the slurry reactor to receive the slurry hydroconversion effluent from the slurry reactor and an outlet of the separation unit is in fluid communication with an inlet of the slurry reactor to receive the slurry recycle stream from the separation unit;
• wherein the slurry reactor is further configured to provide backmixing to fluidize the slurry hydroconversion catalyst to maintain a substantially homogeneous slurry reactor content, and a substantially isothermal temperature profile in the slurry reactor;
• and
• wherein at least about 60% of the feedstock is converted into the vapor phase effluent.