Letter | Published:

A Double-walled Vessel for the Distillation of Highly Inflammable Liquids

Naturevolume 175page1136 (1955) | Download Citation



THE apparatus described below1 provides a safe means of distilling or refluxing highly inflammable liquids. It has the added advantages of heat economy and the avoidance of bumping. The inner portion A of a double-walled vessel (Fig. 1) contains the liquid to be distilled or refluxed, C, and is connected by joint G to a condenser in the appropriate position. The outer portion B is connected to a reflux condenser E and contains, therefore, only a small amount of inert non-inflammable heating liquid D, with a boiling point slightly in excess of that of C. In view of the enclosed nature of the heating bath, a surprisingly small external heat source suffices, and very even heating of the entire vessel A occurs with little bumping.

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  1. 1

    Provisional Brit. Patent No. 30407.

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  1. Department of Colloid Science, University of Cambridge

    • C. C. SMITH


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