FIG.
1
CONVENTIONAL STILL
Which Still Do You Choose?
FOR
COMPLETE
FIG. 2 DPI'S FALLING FILM MOLECULAR STILL
RESEARCH Y O U
T h e ordinary still (fig. 1) is a handy laboratory tool. It does many jobs well. But as you know, it has definite limits. DPI's Falling Film Molecular Still (fig. 2) takes over at the point where ordinary distillation methods stop. Molecular distillation —short-path distillation in exceptionally high vacuum — makes it possible for you to fractionate many substances "undistillable" by earlier methods. In general, these substances include natural and synthetic materials which are in a liquid state above 80° C, have low vapor pressures, and whose molecular weights are
over 300. Any laboratory preparative work the Falling Film laboratory-scale able aid.
PRODUCTS, ROCHESTER
WEST,
13,
NEW
INC*
2 5,
NO.
4 » » JANUARY
2 7,
1947
#
YORK
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