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Magne-Vap™
FLASH EVAPORATOR Spray action—efficiency double that of rotating flask type New twin-bar stirring magnet locks in at high speed Eliminates rotating sealsflasks secured to stationary stand
4946-M10.
For rapid concentration of heat-sensitive mate rials a t reduced pressure. Evaporation rate is approximately twice that of conventional ro tating flask devices. Vigorous magnetic stirring action disperses solution throughout 1000 ml evaporating flask, which is heated by a water bath in transformer-regulated mantle. Need for rotating joints is eliminated, permitting use of simple glass system with "f joints.
System is entirely of borosilicate glass, connected by Τ joints. Solution to be concentrated is placed in evapo rator flask A or in funnel Β with Teflon stopcock for controlled addition. Agitation is provided by magnetic stirrer C and stirring bar D. Evaporator water b a t h Ε is heated by mantle F, controlled by variable transformer G. Vapor transfer tube Η conducts solvent vapors t o condenser flask J in cooling b a t h K. Vacuum connection is made at stopcock of connecting tube L. Thermometers M are provided for evaporator and condenser baths.
The greatly accelerated evaporation rate results from the large surface of solution, which is dispersed as a constant spray of small droplets, continuously wetting entire flask wall. The required high speed stirring is made possible by an efficient, double-magnet bar, driven by a powerful magnetic stirrer. Lock-in effect of double mag net keeps bar in synchronization with magnetic drive a t high speeds. Addition funnel allows maintenance of optimum volume for best dispersion. Condenser flask collects up to 500 ml of solvent.
V a c u u m R e q u i r e m e n t s . A simple type filter pump requiring minimum water pressure of 15 t o 20 lbs. per square inch is usually adequate. F o r solvents of low volatility, a mechanical vacuum pump with suitable vapor t r a p should be employed.
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4946-M10. EVAPORATOR, Thomas Magne-Vap, complete as shown in illustration, without filter pump. For 115 volts, 50 or 60 cycles, a.c. ; 370 watts 205.00
ARTHUR H. THOMAS COMPANY Scientific Apparatus and Reagents V I N E S T R E E T A T 3 R D · P. O . B O X 7 7 9 · P H I L A D E L P H I A S , P A . , U . S . A . Circle No. 71 on Readers' Service Card
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ANALYTICAL CHEMISTRY
