Index number 50 /Up-to-Date

Regeneration process for used group II oils

Base lubricants recovered with SENER’s process.

Base lubricants recovered with SENER’s process.

One of SENER’s distinctive features is its innovation in technology solutions, including the regeneration of used oils. SENER owns a regeneration process that involves extraction with solvents. This process is globally patented and has been tried and tested with excellent results at a plant that has been operating for more than ten years in Fuenlabrada (Madrid, Spain). Another similar plant is currently being planned in Brazil.

The process designed by SENER manages to recover base lubricants from used oils by extracting them with propane and then distilling them, without producing any type of solid waste. The regenerated base lubricants have the same quality as the virgin lubricants. In addition, no hydrotreatment is required, so this process is particularly suitable for low-capacity plants where hydrogen treatment is not economically viable.

SENER has developed the regeneration technology by adding a hydrotreatment in stages to the conventional process.

SENER’s technology achieves a group I base lubricant (according to the American Petroleum Institute classification system) but is very close to group II, as it meets two of the three requirements (the percentage of saturates and the viscosity index). However, the sulphur content is above of that required for group II so SENER set itself the challenge to alter the existing process in order to obtain base oils with lower amounts of sulphur and thus meet growing demand in the group II base oils market.

To accomplish this target, SENER has developed the regeneration technology by adding a hydrotreatment in stages to the conventional process, allowing it to obtain group II base lubricants. The high hydrogen consumption in this kind of facility makes it very difficult to run a profitable effectiveness. For this reason, SENER has conceived an alternative to the usual consumption of hydrogen bottles: generating hydrogen on site from methanol.

This innovative concept has led SENER to take out a new patent on this system.

Gallery

Base lubricant recovered with SENER’s process.

Copyright SENER 2017