Patent attributes
A glass bottle containing a sample of an organic material to be purified is located at a position surrounded by a heater near one end in an outer glass tube. An inner glass tube for catching organic crystals obtained by recrystallization is located at a position near the other end in the outer glass tube. When the sample of the organic material is sublimed and purified, the inside of the outer glass tube is kept in a higher vacuum state (lower pressure) than 200 Pa by a vacuum pump. The sample inside the outer glass tube is heated by the heater, to sublime organic molecules of the sample contained in the glass bottle. The outer glass tube is provided with a temperature gradient, so that organic molecule vapor is cooled near the other end in the outer glass tube, and is recrystallized inside the inner glass tube.
