A TAPER-TUBE CONDENSER ROLLAND F. FELDKAMP' and WILLXAM A. WILT Sterling-Winthrop Research Institute, Rensselaer, New York
THERE is often a need for a small efficient Liebig type condenser in the synthetic laboratory. Current designs using standard taper joints, either full or partially jacketed, have not proved satisfactory because of holdbacks and general inefficiency. Particularly in high vacuum distillations where the use of wide bore heads, columns, etc., with 24/40 joints is most imperative, the bulbous reservoirs fore and aft of the joints present serious physical difficulties. In an attempt to improve the drainage and increase the efficiency of a small condenser, the authors have designed and built the described unit. The full-jacket construction coupled with the tapered inner tube gives outstanding efficiency with low-boiling liquids. The female joint is attached to the inner tube without the customary bulb, allowing constant complete drainage during distillation. Experimentation with various lengths in our laboratory has shown that the size
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175 mm.
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indicated is quite adequate for good efficiency in most of the ordinary distillations.
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pmnt address: Evansville, Indiana.
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