Organic 2 Review Problem 49

Organic 2 Review Problem 49 - flask C. (A ground-glass unit...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
METHODS AND MANIPULATION 33 (A) FIG. 15. current of steam, provided that the compound is volatile, and the impurities non-volatile, under these conditions. The apparatus consists of a round-bottomed flask C (Fig. 15 (A)), having a glass inlet tube which reaches almost to the bottom of the flask and which is connected to a steam generator D: the flask C has also a glass outlet tube, connected in turn to the water- condenser E. The flask is clamped at an angle as shown to prevent the solution in C from being splashed into the entrance of the outlet tube and thus being blown over mechanically into the condenser: this purpose is achieved more completely if in addition a still-head (shown on a larger scale in Fig. IS(B)) is used in place of the outlet tube, since spray will be trapped in the still-head, and returned as a steady stream of liquid to the
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: flask C. (A ground-glass unit combining the steam-inlet and the still-head is shown in Fig. 22(1), p. 43.) The material to be steam-distilled (mixed with some water if a solid compound, but not otherwise) is placed in C, and a vigorous current of steam blown in from D. The mixture in C is thus rapidly heated, and the vapour of the organic compound mixed with steam passes over and is condensed in E. For distillations on a small scale it is not necessary to heat C: if, however, the flask C contains a large volume of material or material which requires prolonged distillation, it should be heated by a Bunsen burner, otherwise the steady condensation of steam in C will produce too great a volume of liquid....
View Full Document

This note was uploaded on 09/19/2011 for the course CHM 2211 taught by Professor Castalleano during the Fall '06 term at University of Florida.

Ask a homework question - tutors are online