FIG. 1
CONVENTIONAL STILL
D P I ' S FALLING FILM MOLECULAR STILL
FOR COMPLETE RESEARCH Y O U NEED B O T H ! The ordinary still (fig. 1) is a handy laboratory tool. It does many jobs well. But as you know, it has definite limits.
over 300. Any laboratory concerned with investigative and preparative work in chemistry today should find
DPFs Falling Flim Molecular Still (fig. 2) takes
the Falling Film Molecular Still—or other DPI
over at the point where ordinary distillation meth
laboratory-scale molecular stills—an indispens
ods stop. Molecular distillation —short-path distil
able aid.
lation in exceptionally high vacuum—makes it possible for you to fractionate many substances
tillation might aid in your research, we invite
"undistillable" by earlier methods. In general, these
your letter telling us your needs or problems.
substances include natural and synthetic materials
DPI men who have pioneered in high
which are in a liquid state above 80° G, have low
vacuum techniques will give careful
vapor pressures, and whose molecular weights are
consideration to your request.
DISTILLATION
PRODUCTS, I N C . | j | |
741
ROCHESTER
RIDGE
ίπαηζ&ΰηα. VOLUME
ROAD
WEST,
13,
NEW
YORK
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2 5, N O .
1 » » JANUARY
6,
1947
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