TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Method: In extracting biochemical products, the vertical reactor is a vertical reactor with reversed flow riser tube inside. The previous stage of preheating takes place in a preheating tube, heating to or above the evaporation temperature of the aqueous mixture of biomass takes place by circulating a fluid by a sleeve located on the outside of the preheating tube, by direct injection into the preheating tube at least one saturated or superheated steam by direct injection tube to the preheating of hot gases, or by its combination. When heating the aqueous mixture of biomass takes place in the same vertical reactor, the heating is performed by direct injection of at least one saturated or superheated steam and/or hot gases or in the reactor itself vertically below the floating level of the aqueous mixture defined biomass. When heating the aqueous mixture of biomass takes place in the same vertical reactor, the heating is performed by direct injection of at least one saturated or superheated steam and/or gas hot tube vertical rise of reverse flow reactor. The method further comprises regulating the temperature and pressure. Condensation of vapors takes place in at least one condensing device and/or the jacket tube located vertically above the reactor. The method also comprises an additional step subsequent to the condensation of vapors comprising separating the condensate biochemicals by a separation technique selected from decantation, extraction, distillation, filtration and/or centrifugation. Part or all of the separated condensate is recovered chemically and/or conducted to at least one condensate reservoir and thence fed back to the process. Preferred System: In the system, the vertical reactor occurs where the hydrothermal carbonization process is a reverse flow reactor riser. The system comprises at least one system for controlling the pressure and temperature output connected to the reverse-flow reactor in parallel to the condensing system. The system for controlling the temperature and pressure comprises: (a) a reservoir with at least one pressure regulating device, (b) a junction between the conduit and the reactor tank, and (c) an injection device condensate to the reactor. The reservoir further comprises a delivery system that acts as an external heat steam generator for injection to the vertical reactor. EXAMPLE - No example given.