Practice of Kinetics (Comprehensive Chemical Kinetics, Volume 1)

3 APPARATUS 33TABLE 3LIQUIDS FOR SLUSH BATHFTemperature C Temperature "CAn i 1 in eMethyl salicylatet-Amy1 alcoholBenzaldehydeDiethyl carbonateBenzyl alcoholButyl benzoateCarbon tetrachlorideBromobenzeneEthylene dichlorideAnisoleDiethyl ketoneTetrachloroethaneChlorobenzenen-HexanolEthyl malonateDiacetone alcoholChloroformCarbon tetrachloride(49.4 %)+chloroform (50.6 %)Ethyl acetateTolueneMethylene chlorideMethanolCarbon disulphiden-Butyl bromideIsopropyl chlorideIsoamyl alcohol-6.6-9-12.0- 14.0-15-15.3- 20-22.9-30.6-35.6-37.3-42.0-43.8-45.2-48.0- 50.0-55-63.5-81-83.6-95.0-96.7-97.8-111.6-112.4-117.0-117.2Ethyl bromiden-Propyl chloriden-Butyl chlorideMethyl cyclohexanen-Propyl alcoholAlly1 alcoholIsobutyl chloriden-PentaneAlly1 chlorideEthyl chlorideChloroform (19.7 %)+ethyl bromide (44.9 %)+trans-1 :Zdichloroethylene(13.8 %)+trichloroethylene (21.6 %)Chloroform (14.5 %)+methylene chloride (25.3 %)+ethyl bromide (33.4 %)+trans-I :2-dichloroethylene(10.4 %)+trichloroethylene (16.4 %)Chloroform (18.1 %)+ethyl chloride (8.0 %)+ethyl bromide (41.3 %)+trans-1 :2-dichloroethylene(12.7 %)+trichloroethylene (19.9 %)Isopentane- 119.0-122.8-123.1- 126.3- 127.0- 129.0-131.2-131.5- 136.4-138.7-139- 145-150-160.5Roy has constructed a variable temperature still (Fig. 25)'13. A, B and C are6 mm, 12 mm and 25 mm OD respectively where C ( -35 cm long) terminates in aB34 joint. B has four copper/constantan thermocouples at 0,2,8, and 14 cm fromthe bottom. The surface is wound tightly with strips of lead or silver foil up to D.This layer is wound with heating coil (10-15 52) with a 10 mm pitch, the lead-inwire being insulated with a glass tube. The thermocouple and heater wires arebrought out through W to a cap which is sealed to the tubing with araldite. Byhaving a coolant around C and altering the pressure of air between B and C, thetemperature of the trap may be varied. Here the trap has a vertical temperaturegradient. By suitable winding, the temperature may be fixed over the length of thetrapt. Usually two of these traps have to be used in conjunction with one another.t See also ref. 22c, pp. 156 and 242.References pp. 104-111