Stirrer brass

Measurements were carried out in a 6-liter brass vessel stirred by means of a flat blade stirrer and equipped with 4 wall baffles. The influence of dispersed phase fraction and of stirring rate was investigated. The dispersed phase fraction was varied from 0.06 to 0.15 while the power input by the stirring was varied from 0.1 to 3 hp./m.8. The interaction rate found was invariably 0.035 sec.-1. Another experiment was carried out by Kramers and de Korver using a short rotary contactor (height = 10 cm., diameter = 9.3 cm., diameter of rotor = 8.0 cm.) which was made entirely of Teflon to prevent wetting of the wall by the aqueous dispersed phase. This reactor... 

The stirrer must provide good circulation if the temperature of th thermostat liquid is to be uniform. One design which is quite efficient and which occupies relatively little space is shown in Fig. 5-27. It is made from a length of brass tube to which supports have been silver-soldered at the top and bottom. A number of holes are drilled in the sides of the tube, and a central rod is fastened to the assembly. As this is turned (usually at — 1,500 to 1,800 rpm), centrifugal force throws the water out of the holes on the side. The supply of water is replenished through the top and bottom holes. The stirrer requires considerable torque for its operations, and it is usually necessary to employ at least a i/oo-hp motor. 

Sokollu [28] described a calorimeter made of a double-walled brass vessel, with internal stirrer and a conical metallic sound diffuser to scatter the beam in a random... 

Stirrer or plrmger for mixing, consisting of a circular brass disc (55cm diameter) fastened to a 600 mm length of brass rod. The disc is pierced with 8-10 holes of 4-5 mm diameter. 

The Pensky-Marten apparatus consists of a brass cup mounted in an air bath and heated by a gas flame. A propeUer-type stirrer, operated by a flexible drive, extends from the center of the cover into the cup. The cover has four openings one for a thermometer and the others fitted with sliding shutters for the introduction of a pilot flame and for ventilation. The tern-... 

Stirrer—Shall be made of 1.6-mm brass rod bent into a smooth three-loop spiral at the bottom. 

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