48A
INDUSTRIAL
AND
ENGINEERING
CHEMISTRY
Vol. 39, No. 12
2 TO 2 0 TIMES
FASTER! O N TOUGH DISSOLVING & DISPERSING JOBS T w o t o t w e n t y t i m e s faster t h a n c o n v e n t i o n a l mixers, t h e Cowles U l t r a - F a s t Dissolver h a s a n i m p e l l e r of advanced design t h a t sets u p c o m p o n e n t s of l a m i n a r flow, producing interface s h e a r b e t w e e n m u l t i p l e l a m i n a e w i t h a h i g h velocity gradient. T h e c o m b i n e d area of t h e m a n y surfaces exposed to t h e s h e a r i n g a c t i o n p l u s t h e t h i n n e s s of each l a m i n a e , s u b j e c t s every particle i n t h e batch to shear and scrubbing forces, greatly accelerating t h e dissolving and dispersing a c t i o n .
With an impeller that elevates and swings in a 180° arc, model B is suited to rapid processing of batches brought to the machine in containers.
Practically pure s o l u t i o n s a n d i n t i m a t e l y - m i n g l e d colloidal dispersions are produced. T h e r e is n o w a i t for undissolved r e s i d u e s or s u s p e n d e d solids to go i n t o s o l u t i o n . . . n o slow f e e d i n g . . . n o c l u m p i n g or balling of t h e dispersed m e d i u m i n process. S p l a s h and dead s p o t s are virtually e l i m i n a t e d .
Safe, Silent,
COWLES Ultra-Fast
DISSOLVER Faster because it develops laminar interface shear
Long-Wearing
A h i g h degree of b a l a n c e i n the- r o t a t i n g p a r t s , c o u p l e d w i t h rubber m o u n t i n g s , e l i m i n a t e s noise and destructive vibration. T h e rugged s t r u c t u r e of t h e m a c h i n e , t h e proved q u a l i t y of t h e bearings a n d m o t o r , all insure l o n g life and low m a i n t e n a n c e . For volatile a n d f l a m m a b l e solvents, s o l u t e s or sols, a n explosion-proof m o t o r , n o n - s p a r k i n g t a n k and impeller—each a d e q u a t e l y grounded for extra safety—are available.
Tanks and Removable
Tank
Models
T h e Cowles Dissolver is available f r o m stock w i t h t a n k s of 100 gal., 250 gal., or 500 gal. c a p a c i t y ; also i n m o d e l s for use i n t a n k s or c o n t a i n e r s b r o u g h t t o t h e m a c h i n e . Motor speed, horsepower a n d design of impeller are all adjusted t o t h e g a l l o n a g e , viscosity, physical a n d c h e m i c a l properties of t h e m a t e r i a l s y o u w i s h t o process. T e l l u s w h a t y o u r p r o b l e m is. W r i t e f o r a d e s c r i p t i v e f o l d e r . . . or a s k f o r a t e c h n i c a l r e p r e s e n t a t i v e t o discuss the matter w i t h y o u . N o charge. N o o b l i g a t i o n .
;
"
r
"'
•
' .'
" ^F""'""'
...
5 YEARS O F C O M M E R C I A L TEST S H O W COWLES DISSOLVER UP T O lOVs H O U R S FASTER O N T Y P I C A L O P E R A T I O N S
^';
Model A has a tank especially designed for the Cowles Ultra-Fast impeller. Available with a heat exchanger in the base, it increases solubility, reduces undissolved residues and is easy to clean.
Type Operation
Material
Gum Cutting Synthetic resin dissolving N / C solution Tinting Pigment dispersion Coating suspension
Rosin Vinylite Nitrocellulose Enamel Heavy Enamel H . T. Clay
Cowles Dissolver
Standard Mixer
1 Vi Hrs. 1 Hr. Min. 1! 5 Min. 6 Min. 1 Hr.
12 6 90 30 150 9
The Cowles Company I N C O R P O R A T E D A s s o c i a t e : A l e x a n d e r Fleck, Ltd., O t t a w a , O n t .
Hrs. Hrs. Min. Min. Min. Hrs.
