A method and process for controlling temperature profiles, pressure and density in dense fluid processes and associated apparatus.

摘要

A process for treating a content in a container material, said method involves a fluid present in the container and comprising at least one pressurisation step in which the pressure is increased in the container and at least one depressurisation step in which decreases the pressure in the vessel, further said process comprising recirculating in at least part time of the method at least part of the fluid, the recirculating comprising: withdrawing from the vessel at least a part of the fluid contained within the vessel and feeding it to a circuit recirculation and subsequently feeding the fluid to the vessel, wherein the fluid after the pressurisation step in a supercritical state and the recirculation made during the pressurisation step and / or during the stage characterized depressurization that the fluid present in the recirculation circuit does not undergo a phase change to a Stand or liquid or solid.