December 1947
INDUSTRIAL
AND
ENGINEERING
STARCH TITANIUM DIOXIDE CALCIUM CARBONATE UREA FORMALDEHYDE PLASTIC FINISHED UTHOPONE NITRO GUANADINE LEAD ARSENATE WHITE LEAD SULFA DRUGS
CHEMISTRY
21 A
I
CHEMICAL DRYING PROBLEMS
MAGNESIUM CARBONATE v·^
Each of the 11 products listed a b o v e represents a distinct a n d different drying problem. Magnesium "carbonate, for example, must b e dried from a n initial moisture content of 565% (bone dry weight basis) to a moisture content of 0.1% at the rate of 5 0 0 pounds per hour (commercial dry weight), while starch is dried from 7 8 . 5 % initial moisture content to 13.6% at the r a t e of 4,800 pounds per hour. E a c h of these products (and the list could b e e x p a n d e d m a n y times) w a s studied by Proctor engineers, a n d the performance of the Proctor equipment finally
IVlite {o*. ^
OR RESEARCH installed w a s g u a r a n t e e d in writing in the sales contract. In some cases the basic designs of the equipment w a s similar—but in e a c h c a s e modifications were m a d e to suit the individual product or plant requirements. While all of these products a r e being dried in h u g e continuous systems equipped with preforming feeds—many problems brought to Proctor engineers h a v e called for small tray or truck dryers. You may be sure that a n y problem — l a r g e or small—that you bring to Proctor & Schwartz, Inc. will receive the full benefit of all of the ingenuity a n d m e a n s at our disposal that were applied to solving the problems covered by these c a s e histories.
If you h a v e not a l r e a d y received this latest booklet—which gives complete information on these 11 chemical drying problems—write for your copy today. Ask for Bulletin i?309.
PROCTOR & SCHWARTZ,
INC.•
PHILADELPHIA 2 0 , PA.
