Adapter, Claisen straight

Fig. I-I (com.) (z) Claisen distilling head with Vigreux column (aa) Graham condenser (bb) West condenser (cc) Allihn condenser (dd) Friedrichs condenser (ee) collecting adapter (ff) vacuum adapter (gg) straight vacuum adapter.

For the distillation, the still head consisted of a Claisen-type adapter with a parallel side arm (24/40 standard taper joints), 21 cm. high and 10.5 cm. wide. An ordinary straight still head is attached to the parallel side arm. This large still head prevents any bumping solid from entering the condenser. 

Into a lOOmL one-necked round-bottomed flask is placed 20 mesh tin powder (1.5 g). The flask is clamped to a ring stand or other support, and placed on a 100 mL heating mantle. The flask is fitted with a reflux condenser topped with a Claisen adapter, and the reflux condenser is attached with rubber or plastic tubing to a cold water tap and a drain. The straight neck of the Claisen adapter is stoppered, and the curved neck is fitted with a gas inlet adapter (either a vacuum... 

---