A system is described for recovering a purified distillable component from a starting mixture utilizing a transition tank to receive a transition mixture distilled from a starting mixture, which is returned to the system for further distillation. The system includes a condenser which features an annular tube having cooling fins arranged inside and outside its annular region to improve its cooling efficiency, and a reflux column which features a flow distributor and a flow centralizer to improve mixing of the rising vapors with the descending liquid. The system also includes a temperature sensor located between the reflux column and the condenser for supplying temperature measurements used in the automatic, operator-less control of the system. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distillation system and, more particularly, to a simplified and automated distillation system which is capable of recovering a purified solvent from a solvent mixture. Description of the Related Art Distillation is widely used, both in the laboratory and on a large industrial scale, to separate boilable liquids (solvents) present in a liquid mixture. During distillation, the liquid mixture is at least partially vaporized and collected separately from the residue.

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For the most part, the effectiveness of separation by distillation is determined by differences in the boiling points of the solvents which make up the liquid mixture. In other words, it is more difficult to separate by distillation, liquid mixtures having solvents with close boiling points. Most distillation systems have several common features. The common features are illustrated schematically in embodiments of a laboratory-type distillation system, FIG. 5, and a batch-type distillation system, FIG. The common features are: 1. A heated area 510, 610 where volatile components are evaporated to form vapors.

A reflux section 520, 620 where vapors are “washed” by cooler liquid returning to the evaporation area. A condenser section 530, 630 where the “washed” vapors are condensed to form a condensate. Vector Cad Cam Download For Windows there. Single or multiple discharge ports 540, 640 for the collection and/or recirculation of the condensate. Distillation is a very old technology, and was developed for the distillation of alcohol spirits, perfumes, and oils. Today, the distillation equipment is relatively more sophisticated, and even a small laboratory-type unit has the capability to provide high-purity separations of closely-boiling solvents.

The modern equipment achieves such high-purity separations by a variety of techniques including spinning band techniques, the use of many theoretical plates (stages), high ref lux ratios, multiple collection ports, and water-cooled spirally-arranged condenser tubes. For simple distillation tasks, however, such high-performance equipment has many disadvantages. For example: 1. It can be very expensive. It requires careful attention during operation.

An experienced operator is generally required. It often contains glass and other breakable parts that can cause hazardous conditions should they break or leak. It requires frequent maintenance and parts replacement. Special work areas and facilities (water and 220 volt outlets, hoods, etc.) normally are required. Operating cycles can be quite long.