What are the requirements of rosin and turpentine products for turpentine?

When rosin is prepared from turpentine, it is necessary to separate turpentine by distillation. Distillation is the key process in the whole production process, which determines the energy consumption of turpentine processing and the quality indexes of rosin products such as color, softening point and crystallization. The traditional rosin distillation method uses steam distillation, that is, indirect steam heating or direct steam desorption, to distill water and turpentine, and then collect residues to obtain rosin products. However, the obtained rosin products often contain moisture and produce more crystals, which ultimately affects the product quality.

The purpose of turpentine is to remove impurities through processing and produce qualified rosin and turpentine through distillation. These two products are important industrial raw materials. Turpentine is mainly a solution formed by dissolving solid resin acid in terpene. After turpentine is processed, volatile terpenoids are called turpentine, and non-volatile resin acid melts are called rosin. When rosin just flowed out of the resin channel of pine trunk, it was colorless and transparent, and the terpene content could reach 36%. After contact with air, terpenes volatilize rapidly, and at the same time, resin acid crystallizes, and rosin itself gradually becomes as viscous and semi-liquid as honey. Turpentine oil sent from forest areas to factories often contains various mechanical mixtures, including pine needles, bark, sawdust, insects and dust.