VERFAHREN UND ANLAGE ZUR ABTRENNUNG VON HOLZINHALTSSTOFFEN AUS BEI DER HOLZVERARBEITUNG ENTSTEHENDEN GASEN

WO 200185310 A UPAB: 20020321 NOVELTY - Separating wood constituents from gases produced during wood processing comprises contacting the crude gas produced from the wood with liquid. DETAILED DESCRIPTION - Separating wood constituents from gases produced during wood processing comprises intensively contacting the crude gas produced from the wood processing at more than 40 deg. C and more than 0.5 bar with a liquid to produce a material exchange between a gas a liquid phase which leads to an enrichment of resins, organic acids and dust particles in the liquid phase 1 (I); cooling the partially purified crude gas by a temperature difference of more than 10 deg. C with simultaneous condensation of the contents still in the crude gas to form a liquid phase 2 (II) consisting of water and different wood constituents such as materials of the substance groups terpene, methanol, ethanol and carboxylic acid present in dissolved form or as floating emulsified phase; and removing the terpenes and the floating phase from the liquid phase 2 (II) to leave a low charged water phase (fraction 3). An INDEPENDENT CLAIM is also included for a device for carrying out the process comprising a first stage (1) formed by a scrubbing column (4) with a cooling and/or heating sump (5) for the mixing and the material exchange of the gas phase formed by the crude gas and a liquid phase, and a circulating system for the liquid phase, and a connection to the circulating system to deviate a partial stream; a second stage (2) formed by a condenser (7) for cooling the partially purified crude gas with simultaneous condensation of condensable gas constituents, and a cooling container (8) for collecting the condensate with a run-off for the liquid phase and a gas outlet for the pure gas; and a third stage (3) formed as a cooling light material separator for removing terpenes from the liquid phase 2 (II). Preferred Features: The water phase (fraction 3) is worked up using a biological process, a membrane process, electrodialysis, wet oxidation or chemical oxidation. USE - Used for separating wood constituents from gases produced during wood processing. ADVANTAGE - The process is economical and is environmentally friendly.