That vitamins A and D can now be produced to sell as cheaply as good brandy is a fact which the chemical engineers of Arthur D. Little, Inc. let out of the pandora box of industry last week. The ...

The vacuum distillation process was based on a dry-tower design at 14 mm Hg overhead pressure with 2,300 pph of overhead load at 80 mol % non-condensable gases and 20 mol % steam.

THE low vapour pressure of tin at temperatures up to 1,000° C. makes it possible to remove more volatile constituents of tin-rich alloys by vacuum distillation. The use of this method has been ...