EQUIPMENT maximum amount of vapor -which can be generated from the evaporator at cooling temperatures of 60° F . Auxil iary facilities can also b e provided for supplying water at 34° F . to the con denser. Unit is arranged with a variable speed drive to permit rotor speed with
Solvent extractor and cLrive unit together are only slightly larger than an office desk. The solvent extractor is designed to process 500 gal. per min, says Podbielniak
Solvent Extractor Is Compact For the petroleum, chemical, and allied industries, Podbielniak has de signed a centrifugal countercurrent solvent extractor with high capacity and efficiency. Podbielniak says the model, called the CHeniizon, is designed to process 500 gaL pex min. of com bined streams of a cliexnical extraction system having difficult mixing and separating characteristics. The rotor of the Chemizon is 42 in. in diameter by 42 in, wide and is con structed entirely of type 316 stainless; speed is 2000 r.p.rn, Rotor cover is stainless and the base i s stainless clad steel. Specially designed mechanical seals and heavy duty roller bearings lubricated by a forced feed recirculat ing oil system enstire - practically maintenance-free operation, according to company. One of the advantages of the unit, according to the company, i s compact ness. Extractor and drive unit together are only slightly larger than an office desk. A second advantage of the Chemizon, according to Podbielniak, is the extremely lo\v material holdup required for continuous operation. For production applications handling 5 0 0 to 1000 gal. per min., tfcie rotor material holdup is approximately 2 0 0 to 2 5 0 gal. The solvent extractoxs are furnished to handle capacities u p to 1000 gal. per min. in a single machine. Each extractor is designed fo>r the customer's specific system. Company recommends the Chemizon for food processing, deguiriming of soy bean oil, removal of acetic acid from 3618
waste sulfite liquors, extraction of aro matic hydrocarbons, and dephenolizing of ammoniacal liquors. Ε 1
Portable Evaporator for Pilot Plant Study Rodney Hunt has designed a port able, laboratory model Turba-Film exap orator for pilot plant study of evaporation, single step distillation, deodorization, heating, and cooling. The evaporator uses Rodney Hunt's agitated film method and is provided with a heat transfer area of one square foot. The unit is built of type 316 stain less throughout and is designed for the use of heating mediums up to 250 p.s.i.g. and 700° F. The steam jacket of the evaporator is also baffled for the use of hot oil as a heat transfer medium. The condenser is a vaporin-tube unit of 316 stainless in contact -with process vapor. A surface con denser provides for handling the
studies. Company says the Turba-Film evaporator can be supplied as an indi vidual unit with stand or with auxiliary condensing equipment, or as a com plete packaged plant including vacuum equipment, feed pumps, discharge pumps, and instruments as required. The Turba-Film is capable of evap orating up to 5000 lb. of water per hr., according to Rodney Hunt. Unit is designed t o handle organic and inor ganic chemicals, solvents, latices, phar maceutical "mycins", vitamins, juice concentrates, edible oils, gelatin, glues, confectionaries, coffee, and detergents. E2
• Pressure measuring pickup that will operate under temperatures as high as 2200° F . has been developed by Endevco for rocket and engine manufac turers as well as the chemical and proc ess indîistries. Company says outstanding features are in the cooling passage design, nat frequency response from 2 c.p.s. t o 5 0 0 0 c.p.s., and the large output of 40 mv./p.s.i. in the 0 to 500 p.s.i. pressure range. Units are available in ranges of 500, 1000, 2500, and 5000 p.s.i. Ε3 • N y l o n f a s t e n i n g s , b y Nylogrip Prod ucts, have tensile strengths u p to 15,700 p.s.i. and can withstand continuous heat u p to 300° F . Fasteners are selflocking, noncorrosive, and insulating, and w e i g h less than half as much as aluminum fasteners. Ε4 • Gas d e n s i t y balance, by Arnold O. Beckman, measures the density of a sample gas by null balance principle. A small dumbbell is supported on a horizontal quartz fiber. One ball of the dumbbell is punctured so that it will not experience buoyancy effects. The otîier ball tends to rise or dip as the density of the gas increases or decreases. Thus the dumbbell creates a rotational force about the quartz fiber as it responds to density changes. The magnitude of this force is proportional to the density of the sample gas. Com(Continued on page 3630) For further information on any it*~3i mentioned here, see coupon on page 3620
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^l^^i^^^mÊaÊ^^^ÊÊ^^Smssm
technical services CLARK MICROANALYTICAL LABORATORY Routine analyses in one week C H , N , S, Halogen, Fluorine, Oxygen, Alkoxyl, Alkifiiide, Acetyj, Terminal Methyl, etc., by special ists in organic microchemical analysis. Howard S. Clark, Director P. O . Box 17 Urbane, Illinois
SCHWARZKOPF MICROANALyTICAL LABORATORY Routine AnalysisWithin One Week C H , F, O , N , S, P, Si, H a l o g e n s , Group Analyses Molecular Weight a n d Others
56-19 37 A v e . , Woodside 77, N. V. TELEPHONE HAvemeyer g l U I I
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' « S S T f LABORATORY SERVICES1 S£5£â5S! s project research and consultation in I i FOUNDATIONj B i o c / , e m i r f r > v Chemistry, Bacteriology ] and Insecticide Testing and Screening M i n e r a l determinations including sodturn a n d fluorirfe · P r o x i m a t e analyses • Vitamin a n d a m i n o a c i d assays * Food chemistry a n d microbiology · Enzyme investigations
WISCONSIN ALUMNI RESEARCH FOUNDATION
Write for price schedule i P. O . BOX 2059-E
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8-in. or 5-in. sieves. B e c a u s e the shaker a c c o m m o d a t e s u p t o six sieves^ plus cover a n d b o t t o m p a n , i t is p o s sible to separate a m i x t u r e , b y p a r t i c l e size, into six c o m p o n e n t s i n o n e o p e r a tion, a c c o r d i n g to c o m p a n y . Ell
NATIONAL BARGE COMPANY 3 1 6 Fourth A v e . , Pittsburgh 2 2 , Penna. Member: American
Waterways
Operator a Assn.
LaWali & Harrisson
food research laboratory
Ot* H. 1921 Walnut S t . Philadelphia 3. Pa
EQUIPMENT {Continued
from page
3618)
p a n y says a 9 5 % response is obtained in less than o n e minute. Sensitivity is 1 /'2% of full scale; accuracy is Ύ/{ίο of full scale. Ε5 • P o t e n t i o m e t e r , b y Perkin-Elmer, is a n e w 4 0 0 c y c l e small version of its a,c. p o t e n t i o m e t e r for use i n servo systems and analog computers. T h e 4 0 0 cycle m o d e l h a s a l o w output impedance, less than 1 3 0 o h m s , w h i c h eliminates the n e e d for isolation amplifiers i n many applications, according t o company. U n i t also h a s an extremely l o w phase shift. ' i €> • L a b o r a t o r y b a l a n c e , by Torsion Bal a n c e , is said to simplify a n d s p e e d u p w e i g h i n g operations. Features of the n e w balance include torsion bands m a d e of Elgiloy, a stronger corrosion resistant alloy w h i c h results in longer, trouble-free life for t h e b a l a n c e . A single b e a m w i t h vernier permits w e i g h i n g s from 0 . 0 1 g m . to 1 0 gin. without t h e use of l o o s e - w e i g h t s . Ca p a c i t y of t h e balance i s 2 0 0 g m . , and the sensitivity reciprocal is 0.2 g m . • H u m i d i t y c a b i n e t for corrosion pre vention tests has b e e n d e s i g n e d b y Pre cision Scientific. Cabinet m a y also b e 3630
used for other tests requiring e x t r e m e h u m i d i t y at 7 5 ° to 1 5 0 ° F . A revolv i n g s t a g e s p e c i m e n rack, motor-driven at V a r.p.m., h o l d s 3 3 test p a n e l s . A dual hydraulic thermostat regulates heat to within 2° F . T h e c a b i n e t is p r o v i d e d with a n air dispersion s y s t e m and an air flow meter. Ε8 • H o t p l a t e , b y Fisher Scientific, c o m bines a n agitator w i t h a h e a t e r so that b o t h operations are s i m u l t a n e o u s . T h e unit rotates 2 1 6 times a m i n u t e in a circle w i t h a 1 / i c - i n . radius. T o p of t h e hotplate is m a d e of a l u m i n u m , t h e 2 0 0 0 - w a t t h e a t i n g e l e m e n t b e i n g cast right into it. T h e t o p plate is regulated within a . nperature range from 2 0 0 ° t o 7 0 0 ° F. E9 • M i c r o s c o p e a c c e s s o r y , by Bausch & L o m b , m e a s u r e s strain in glass and plastics. K n o w n as t h e accessory slot c o m p e n s a t o r , u n i t m e a s u r e s retarda tions from 0 t o 2 7 0 0 m^t. C o m p a n y says unit performs w i t h greatest effi c i e n c y w h e n u s e d w i t h light h a v i n g a w a v e l e n g t h of 5 8 9 0 A. T o a c h i e v e this light value, a n interference filter is available for u s e w i t h t u n g s t e n illumi nators. Ε 10 • R e d e s i g n e d s i e v e s h a k e r , b y Central Scientific, is for m e c h a n i c a l analysis of industrial m a t e r i a l s , or for s i e v i n g h e a v y mineral p o w d e r s , light organic s a m p l e s or fine pharmaceutical p o w ders. T h e n e w shaker h o l d s standard
BOOKS (Continued
from
page
3613)
The Metallurgy of Zirconium. National Nuclear Energy Series. Division VIL Vol. 4. Benjamin Lustman and Frank H. Kerze, Jr., editors. xviii -f- 7 7 6 pages. McGraw-Hill Book Co., 3 3 0 West 42nd St., N e w York, Ν. Υ . 1955. $10. Fifty contributors present a n account of the occurrence, reduction, properties» and uses of zirconium and zirconium alloys. Paperbound Proceedings, American Petroleum Insti tute. 1954. Section I I I . Refining. 424 pages. American Petroleum Insti tute, 50 West 50th Street, N e w York 20, Ν. Υ. 1955. $1.00. Includes corrosion, training, refinery maintenance, oil storage-tank failures, waste disposal, motor fuels, petrochemicals, processes, and fractionation. World Development of Atomic Energy. Edited and compiled b y Oliver T o w n send with assistance of J. Robert Bar low, iv -f- 150 pages. Atomic Indus trial Forum, 260 Madison Ave., N e w York 16, Ν. Υ. 1955. $5.00. Report is based on a survey which covers 32 nations known to h a v e substantial atomic energy activity. Includes special supplements on U. S. bilateral agreementsand the U N Geneva Conference. Problems on the Design of Machine Ele ments. 3rd edition. Virgil M . Faires and Roy M. Wingren. vi -f- 1 4 8 pages. The Macmillan Company, 6 0 Fifth. Ave., N e w York 1 1 , Ν. Υ. 1955. $2.25. Methods for Determining L e a d i n Air and in Biological Materials. Second edition. 69 pages. American Public Health Association, 1790 Broadway, N e w York 19, Ν . Υ. $1.25. Includes collection of samples, preparation, of samples for analysis, recommend e d pro cedures, dithizone methods, physical: methods, and selected bibliography.
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ENGINEERING
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