Nujol bubbler

B. Benzobarrelene. A dry 1-1., three-necked, round-bottomed flask is equipped with a magnetic stirring bar, a combined gas-inlet tube and rubber septum, a 500-ml. pressure-equalizing dropping funnel, and a reflux condenser connected to a Nujol bubbler. The flask is charged with 500 ml. of dry tetrahydrofuran (Note 14) and 17 g. (0.74 mole) of sodium wire with a diameter of ca. 0.5 mm. The mixture is stirred and heated at reflux under an atmosphere of argon or nitrogen, and 50 ml. of freshly distilled tert-butyl alcohol is added. Immediately afterward a solution of 15 g. (0.051 mole) of... 

The drying tube was connected to a Nujol bubbler. A nitrogen atmosphere was maintained during the reaction by passing nitrogen through the apparatus at a rate of ca. one bubble per second. 

The rate of bromotrifluoromethane transfer was monitored by a Nujol bubbler. A mark is made on the Ace reservoir trap to indicate the 250-mL volume. 

Evolution of ethane can conveniently be monitored with a Nujol bubbler in the nitrogen line by turning off the nitrogen flow. 

A 1-L, three-necked, round-bottomed flask is equipped with a serum cap, a nitrogen inlet tube connected to a T-piece that leads to a prepurified nitrogen supply and to a Nujol bubbler, and a solids-transfer tube (in the center neck). The flask is evacuated, flamed out, and flushed with dry nitrogen. It then is charged with octacarbonyldicobalt (73.4 g, 0.215 mole) and 440 mL of dry tetrahydrofuran (THF). The transfer tube is removed and replaced with an... 

Incorporation of a 10 or 12 liter surge flask permits the filling of up to a 2 liter vessel without creating a negative pressure (VERBOTEN ) or having to greatly increase the flow rate of gas through the purifier. The optional Nujol bubbler assembly provides a qualitative measure of flow rate. 

Optional Nujol Bubbler Assembly (Figure 5) Local fabrication 92.00... 

Figure 9. Side view of a manometer and Nujol bubbler of the vacuum line.

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