SOLVENT RECOVERY SAVES MONEY SAVE 6 5 % TO 8 0 % ON PROCESS SOLVENT COSTS Solvent recovery by the
CLEANER S A N D S . . . m o r e efficient de-sliming . . . w i t h t h e " O V E R D R A I N " Classifier T h e "Over-drain" Classifier is a completely new device in ( t h e field of mechanical wet classifiers. T h e belt, with lifting flights at tached b e n e a t h , moves u p w a r d l y out of t h e sand bed between two stationary side shrouds—creating t h e effect of a series of moving, closed, washing c o m p a r t m e n t s . T h e only outlet from these com p a r t m e n t s is via holes in t h e belt above. Surplus liquid and slimes discharge t h r o u g h these "overd r a i n " holes without mixing with the oncoming sands. T h e end re sult is an extremely clean sand discharge, excellent de-sliming— m a k i n g t h e " O v e r d r a i n " Classi fier an ideal washing device.
Write for Hardinge Catalog 39-C— 12
Section through "Overdrain" Classifier showing upward-moving, closed, washing compart inents.
CARBIDE can tell you how a solvent
recovery plant can recover your process solvents. Write now for the booklet, "Solvent Recovery by the COLUMBIA Ac
tivated Carbon System." Address Depart ment B, Union Carbide Olefins Company, 30 East 42nd Street, New York 17, New York. Unretouched photograph of "Overdrain" action above the hell—water and slimes discharging upwardly.
HARDINGE C O M P A N Y ,
I N C O R P O R A T E D
YORK, PENNSYLVANIA · 2 4 0 A R C H ST. · M a i n Office a n d W o r k s New York · Toronto · Chicago · Hibbing · Houston · Salt lake City · San Francisco · Birmingham · Jacksonville Beach 88 A
Activated Carbon system is the efficient, economical way to recover solvents vapor ized in manufacturing processes. Thus, it saves you money. Alcohols, esters, ethers, ketones, hydrocarbons, chlorinated com pounds, and practically all mixtures of these solvents can be recovered and reused. And look at these facts . . . efficiency— more than 99%: cost—1 to 2i per pound of recovered solvent. Thus, you save 6 5 % to 80% on your process solvent costs. Here's how solvent recovery works. Vapor laden air is drawn from the evapo ration process and passed through a bed of COLUMBIA activated carbon. The solvent vapor is adsorbed on the carbon and the denuded air is discharged into the atmos phere. When the carbon becomes satu rated, the vapor laden air is switched to a second adsorber. Then, low-pressure steam drives the solvent out of the carbon bed and the steam-solvent mixture is condensed. If the solvent is insoluble in water, an auto matic decanter separates the mixture. If the solvent is water-soluble, distillation does the job.
INDUSTRIAL AND ENGINEERING CHEMISTRY
UNION CARBIDE OLEFINS COMPANY
D i v i s i o n of U n i o n Carbide Corporation 3 0 E. 42nd Street, New York 17, Ν. Υ. "Columbia" and "Union Carbide" are registered trade marks of Union Carbide Corporation.