The reactor is a cylindrical container with a nominal capacity of 300 l with a Klopper bottom and a screwed lid with the same characteristics. This container is immersed in a larger one that contains thermal oil and three electrical resistances at the bottom to heat it up to process temperature. The set has been heat-insulated to guarantee thermal insulation and to avoid accidents due to contact. The reactor has a register and a stirrer driven by a gear motor. The conical tank has a capacity of 30 l and its function is to receive the additives to be incorporated into the process after mixing. The lobe pump has the function of circulating the product in the mill. The closed circuit of conduits transports the product to the mill or recirculation through a set of manually operated valves. All the elements described in contact with the product are made of AISI 304 stainless steel.