GROWING OF CRYSTALS FROM SOLUTIONS AND DEVICE TO THIS END Russian patent published in 2014 - IPC C30B7/08 C30B29/14 C30B29/54 

FIELD: process engineering.

SUBSTANCE: evaporation of solvent from oversaturated solution surface in crystallisation vessel. Solvent vapors are condensed at vessel top part and directed to vessel bottom. Note here that solvent condensate is fed by the main pump to external container filled with crystalline material. This allows a continuous controlled dissolution of material while solution formed in contained is fed therefrom to vessel crystallisation zone filled with oversaturated solution. Portion of solution is directed by extra pump from container top section via bypass line into container bottom. At crystal growing, critical mass of crystalline matter inside container is controlled. Container is continuously filled with crystalline matter at crystal growing.

EFFECT: high-quality crystals grown at simple equipment.

5 cl, 1 dwg