VACUUM EVAPORATING MACHINE FOR LIQUID PRODUCTS BASED ON FLAMMABLE SOLVENTS.

In various biochemical technologies, it is necessary to isolate useful substances from solutions derived from plant or animal raw materials using flammable solvents such as ethanol, acetone, and toluene, or to concentrate these solutions. The challenge lies in ensuring that the volatile substances, which have low boiling points and are obtained after solvent removal, retain their biological activity without degradation due to high temperatures. To preserve the biological activity of these substances, solvent removal must occur at relatively low temperatures. This requirement can be met by using a vacuum drying machine equipped with a cooling system that allows precise temperature control of the drying solution. This machine substantially differs from traditional sublimation machines, particularly in its vacuum pumping equipment and the design of the vacuum chamber, which are tailored to safely dry flammable materials. Moreover, the machine control system is designed to safely manage the drying process, preemptively addressing potential risks associated with drying solutions derived from animal or plant raw materials. SIA Cryogenic and Vacuum Systems from Ventspils has developed a prototype of an industrial vacuum evaporating machine, which is detailed in this article. [ABSTRACT FROM AUTHOR]