Abstract: There has been provided a system and apparatus for recovering turpentine from a thermomechanical pulping process for making paper, which thermomechanical pulping process utilizes a plug screw conveyor for squeezing and feeding pulp chips. The thermomechanical pulping process is conventional. The liquid effluent from said plug screw conveyor contains an appreciable amount of turpentine. The liquid effluent is collected under superatmospheric pressure and flashed into vapor/liquid separator by releasing the pressure on the liquid. This vapor is condensed in a suitable condenser and the condensate collected in a decanter where the turpentine collects as a separate phase and the water also as a separate phase. Condensate from various vents in the conventional thermomechanical pulping process may be collected for more nearly compelete removal of turpentine and other oleoresinous components.

Abstract: There is provided a process and apparatus for improving the yield of turpentine collectable from the vent gases emanating from a pulp disgester in a kraft paper pulp Process. The apparatus is characterized by the insertion in a conventional turpentine recovery system of a gas/liquid contact vessel for intimately contacting the hot turpentine containing vent gas from a pulp digester with liquid foul condensate recycle from a turpentine decanter and a condenser for condensing the condensible components of the recycle treated vent gas, whereby the foul condensate is greatly improved as to contaminant content and rendered suitable for reuse in the plant.

Abstract: An apparatus for a wheeled vehicle for slashing pine trees to enhance the production by natural means of terpenoid materials, and comprising a tree slashing device pivotally mounted at the end of an arm extending from the vehicle, and irritant applicator also carried on said tree slashing device for applying an irritant material to the freshly slashed wound in the stem of the tree.