| 摘要 |
<p>The invention concerns a procedure and a means for separating or purifying organic substances from a mixture of substances in molten state by crystallizing the substance to be separated/purified on a cooled surface. The substance mixture in molten state is conducted at an infeed point (30) into an annular space (13) confined by a rotating cylindrical shell surface (11), which is cooled, and by another cylindrical shell surface (12) spaced therefrom. The substance to be purified/separated is cystallized on the surface of the rotating, cooled shell (11) to form a deposit (20), which is melted at a first removal point (31), whereat at least part of the melted purified material is removed and the remaining part is conducted in a return flow (B) back along the annular space (13). Impure molten substance mixture is conducted off at a second removal point (32) located, as seen in the direction of rotation (A) of the cooled shell surface (11), upstream to the infeed point (30). </p> |
