The Client is a specialist of natural ingredients extracted from biomass and dedicated to cosmetic and pharmaceutical markets.

The solvent (ethanol) used for the extraction is regenerated by the Client on its own industrial plant.

Processium was in charge to develop a process for the regeneration of ethanol, and to determine the best operating conditions:

  • to insure the robustness of the process to manage the variability of impurities,
  • to respect the conformity of the solvent to standarts (impurity < ppm).

Furthermore, the Client wishes to avoid any investment, or at least to limit the amount.


After a process synthesis phase, it had been decided to develop an adsorption process (carbon black) followed by a distillation (the equipment already exists on Client plant). Processium proposed a methodology devided into three phases:

  • Phase 1: Processium made measurements to determine the performances of several carbon black.
  • Phase 2: Processium determined the optimal operating conditions (temperature, quantity of reactive, volume of coal). A design of experiments is built to minimise the number of laboratory scale experiments.
  • Phase 3: Processium validated experimentally adsorption and distillation processes to validate that the specifications on the regenerated solvent are respected.


A technical process package of the industrial scale unit was proposed and built on the existing plants.