NEW EQUIPMENT & MATERIALS of the best silica-type adsorbents. T h e new desiccant has small pores in its crystalline structure which exclude both refrigerant and oil molecules from the adsorption capacity. For this reason, the entire inside surface is used solely for water molecules, explaining extremely high capacity. T h e new class of desiccants, called molecular sieves, is not affected by compressor oil, and acids are re moved completely by coadsorption with water. Dept. IEC, Linde Air Products Co., 30 E. 42nd St., New York 17, Ν. Y.
Polyethylene Evaporation Barrier Evaporation losses annually rob industry of millions of dollars. As a solution to this problem, a m a n u facturer has come u p with an evap oration barrier specifically designed for vapor retardation by as m u c h as 7 5 % . T h e barriers are in essence expanded polyethylene miniature floats containing thousands of tiny air cells for bouyancy and light
weight. T h e surface contours are designed to provide extensive inter locking and clustering at the sur face of volatile solutions. Dept IEC, American Agile Corp., 5461 Dunham Road, Maple Heights, Ohio.
Foamed Plastic Insulation Board O n e way to cut down on the weight of refrigeration equipment
How Anderson's MODERN Purifier Design BENEFITS YOU! One V e s s e l Re quired — Hi-eF Internal Purifier i n s t a l l e d inside vessel eliminates n e e d f o r sepa rate scrubber.
No Maintenance Cost — N o m o v ing parts to w e a r out—no filters to clog or replace.
Low Pressure Drop — Prevents e x c e s s i v e pres sure losses w i t h out a f f e c t i n g s e p a r a t i n g efficiency.
Compact Design —elimination of filters or screens p e r m i t use o f much smaller vessel.
COMPANY
Division of International Basic Economy Corporation 1 9 9 2 W E S T 9 6 T H STREET . CLEVELAND 2, O H I O W a t c h d o g s o f Pipeline Equipment and P r o c e s s e s
PURIFIERS
« SCRUBBERS
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SEPARATORS
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EXTRACTORS
For further information, circle number 136 A on Readers' Service Card, page 139 A 136 A
INDUSTRIAL A N D ENGINEERING CHEMISTRY
Classifier Has High Precision A new high-capacity classifier that increases the precision with which fine powdered materials m a y be divided by particle size was re cently demonstrated. T h e unit is available in four sizes, with capacity ranging from approximately 1000 to 30,000 pounds per hour. Extremely small and compact in relation to its high capacity, a unit with a nominal rating of 10,000 pounds per hour occupies about the space of a n office desk. In a typical production setup, the powder is fed into the classifier from a vibratory feeder. After classification, the fine fraction is carried by the exhauster air stream to a collector. T h e coarse fraction is carried out through the air lock of the classifier, from which it is either returned to the mill for regrinding or is collected as product. Dept. IEC, The Sharpies Corp., 2300 Westmoreland St., Philadelphia 40, Pa.
Organosol Coating for Metal Surfaces
E v e r y feature of Anderson's patented m o d e r n Hi-eF Purifiers w i l l benefit y o u by l o w e r i n g o p e r a t i n g and installation costs. For guaranteed satisfaction, specify A n d e r s o n H i - e F Purifiers.
T H E V. D . A N D E R S O N
is to use lightweight insulation. Foamed plastic insulation board fills the bill. A rigid, foamed plastic insulation board that combines light weight a n d moderate cost with high compressive strength and high in sulating efficiency is now on the market. T h e material has more than sufficient strength for use u n d e r concrete wearing floors, as free standing walls in cold rooms, and in walls and floors of truck and trailer bodies. It can be used at tempera tures from - 5 0 ° F. to 160° F. I t is applied using an adhesive, with additional support supplied in cold rooms by hardwood skewers or galvanized nails. Dept. IEC, Armstrong Cork Co., Lancaster, Pa.
M a n y organic protective coatings have limited chemical resistance because of the relatively high con centration of plasticizer needed to m a k e the coating easy to apply. Now a vinyl coating having a low plasticizer content to produce a h a r d e r coating with less tack a n d greater chemical resistance is on the market. Formulated with 35 parts of plasticizer per 100 parts of resin,
