E Q U I P M E N T

NMR Heads For Process Control Schlumberger W e l l Surveying enters N M R field with unit designed for process control l abora to r i es

Λ PROCESS CONTROL· USE has been found for nuclear magnetic resonance: Measure water in solids such as wood pulp, starch, cotton, wheat, and flour. This new development opens the door to wider use for NMR. Up to now, it has been a research tool, often used to find structures of complex com­pounds. It has been said a plant con­trol application could boom NMR. One reason: there are more control labs than research labs.

Schlumberger Well Surveying Corp. came up with the process control appli­cation. And it did it with a new NMR unit designed primarily for water de­terminations. The equipment is not as complex as the NMR now marketed by others, Schlumberger says. Nor does the new unit have as much flexi­bility. But, it is geared to pick up water's protons without interference from other protons in the material being analyzed, the company points out.

Schlumberger calls its process con­trol unit the NMR Analyzer. It is designed for use in control labs, not on the process stream. First commercial

models are being made now and will be available this summer.

• Three Components. The equip­ment consists of a console unit, plus a strip chart recorder and a permanent magnet. Operat ing controls are in fixed positions. Once set for a particular product, they need not be changed, says the company. This means tech­nicians can run the Analyzer by simply throwing the switch. One to two min­utes are required per analysis.

Weighed samples (about 30 grams) are placed in the permanent magnet's field. The sample tube is surrounded by a coil carrying a radio-frequency current. When the switch is thrown, magnetic field is scanned across the resonance point. Water 's protons ab­sorb energy and change the voltage across the coil. T h e voltage change is recorded on the strip chart as a deriv­ative curve. Water content is derived from the distance between peaks on this curve, plus a calibration chart.

• No Interference. How come the NMR Analyzer will record water's pro­tons and not the protons in a solid

material being analyzed? Schlumber­ger researchers explain it this way: Protons in the solid are very tightly bound. Protons in the water are mo­bile—except for a very small percentage which are tightly bonded to the solid surface. When analyzed, the mobile protons in free water give rise to a much sharper resonance line than the others. For any specific material, the instrument parameters can be selected so that only the water's protons are recorded.

Materials with a free water content of over oOr'f on a wet basis have been successfully analyzed by NMR. The method's current success depends upon a precalibration against a standard moisture determination method for each class of material analyzed. Once done, the analyzer's stability ensures that it can be used indefinitely to con­trol water in the process or product, explains Schlumberger.

Not only water, but any mobile hy­drogenous liquid such as oil—vegetable or mineral—can be detected and meas­ured by this NMR Analyzer, the com­pany adds.

• More Plans. The NMR unit puts Schlumberger in a new field. The com­pany has made its own instruments for oil well logging since 1934. About two years ago. Schlumberger decided to diversify but stay within its physics and electronics know-how. NMR was one area selected. Others are planned.

For example, the company is now building a prototype unit called the Nitrometer. It will be designed for nitrogen process control. The company hopes it will find use in the grain, fer­tilizer, and explosives fields.

Also in the mill is another NMR ap­paratus for water measurements. This one will be a small model designed for direct monitoring of process streams. Work here, explains Schlumberger, is still in its early stages. In fact, final design will depend upon experience gained from the control lab NMR Analyzer.

What Schlumberger has in mind, after these units, is a company secret. But the firm does point out that its plan is to make units for specialized monitoring jobs. Ε 1

Ultrasonics for Emulsions English engineer brings four models o f ultrasonic emul-sifiers to U. S.

O o x i c ENGINEERING C O R P . of Stam­ford, Conn., has been formed by E. C. Cottell, English mechanical engineer. Cottell's new company is introducing to this country four ultrasonic emulsi-fiers designed to combine faster emul-

Schlumberger's NMR Analyzer for plant control labs is less complex than earlier research instruments. It has three components—console unit, strip chart re­corder, and permanent magnet. Here, Schlumberger engineer F. S. Replogle (left) and group leader F. F. Kirchner study 3-D model of magnetic field

7 8 C & E N J U N E 10, 1957

SCIENTIFIC

C U S T O M 6 L A S S BLOWING

The ancient Egyptian craftsmen who blew the tiny phials t ha t held the tears of mourners a t a Pharaoh's funeral would be in for a surprise or two if they could see the skilled glass blowers at work in the Fisher Custom Glass Blowing Division.

On any one day Fisher Glass Blowers may be turning out intricate glass hearts for medical research; next, 10-foot test tubes; then, miniature milk bottles for chinchilla studs. But whatever is being blown in the Fisher Glass Shops, it will be made with skill and accuracy to exacting specifications.

If your needs involve special glassware, drop a few lines of description or a scaled sketch t o the nearest Fisher plant shown a t right. And if it is standard glass items you require, remember Fisher stocks America's largest selection of labora­tory glassware. φ

Φ

Φ

America's Largest Manufacturer-Distributor of Laboratory Appliances and Reagent Chemicals

C H I C A G O 5 1 1458 N. Lamon Ave.

W A S H I N G T O N , D. C . 7722 Woodbury Dr. Silver Spring, Md.

NEW Y O R K 14 633 Greenwich St.

P I T T S B U R G H 19 711 Forbes St.

ST. L O U I S 18 2850 S. Jefferson Ave.

M O N T R E A L 9 8505 Devonshire Rd.

T O R O N T O 8 245 Carlaw Ave.

B-53

Boston Cleveland Pittsburgh

Buffalo Detroit St. Louis

Chicago New York Washington

Charleston, W. Va. Philadelphia Montreal · Toronto

INSTRUMENT SHOPS

CHEMICAL MFG. DIVISION

DEVELOPMENT LABORATORIES

UNITIZED FURNITURE

CUSTOM GLASS BLOWING

SERVICE AND REPAIR SHOPS

STOCKS IN 7 MAJOR CITIES

J U N E 10, 1957 C & E N 7 9

FISHER

-v. » 3 ^ *«ί~ t "V5^ ,̂ Γ ^ΑΛ

instruwtèwÊê

>iy ·% ' v , , - , * % " # * * ( χ ^ v

.AppZied Physics Corporation/Pasadena/California

F o r U l t r a v i o l e t - V i s i b l e S p e c t r o p h o t o m e t r y

The Cary Model 11 provides performance comparable to the finest ; cost comparable to the cheapest.

Considering the purchase of a recording spectrophotometer? The following comments may help you get much more for your money.

Most spectrophotometer users regard the Cary Model 14, with its 1860 A to 2,6 mu wavelength as the finest recording spectrophotometer avail­able. We have been surprised to dis­cove r t h a t q u i t e a few p e o p l e do not rea l ize tha t the Model 14 has a companion instrument —the Cary Model 11 —which gives the same high quality of the Model 14 at a cost comparable to the lowest-price recording spectrophotometer. The difference between the Model 11 ~>nd the Model 14 is in wavelength range. Of course, where the wider wavelength range is required, the Model 14 is the finest instrument available. However, for applications in the ultraviolet and visible ranges

(2100 A to 8000 Â) the Cary Model 11 provides the same high degree of accuracy, ruggedness, and dependa­bility as the Model 14, as well as its convenience and flexibility, including linear wavelength recording, speed of scanning, accessories, etc. Important performance data on the Cary Model 11 are outlined below.

Stray Light: Less than 0.0001% over most of the range.

Scanning Speeds: 1.0 Â per second (ultraviolet region) to 125 Â per second ( visible region ).

Resolution: 1.0 Â or better throughout most of the range.

Wavelength Accuracy: Better than 5.0 Â in the ultraviolet region and better than 10.0 Â in the visible region. Reproducibility : Better than 0.5 Â in the ultraviolet and 3.0 À in the vis­ible region.

Photometric Reproducibility: Reproduci­bility better than .004 in absorbance can be achieved with the Model 11.

20,000 HOURS OF SERVICE WITHOUT MAJOR REPAIRS The first Cary Model 11 was produced in 1947, and since then nearly every lead­ing analytical laboratory in the United States—and many abroad —has acquired one or more Model l l ' s . The perform­ance, flexibility and reliability of the Model 11 have been proved in all kinds of research and control applications.

One of the first instruments to be man­ufactured—Serial No. 2 —was recently overhauled at the factory after having been in use twelve hours per day for over six years without requiring any

service other than routine maintenance. This instrument has now begun a second stint of reliable service which will undoubtedly run into additional thou­sands of hours.

FREE BULLETIN If your spectrophotometer applications are in the visible or ultraviolet range, investigate the many advantages of the Cary Model 11. For complete informa­tion write to Applied Physics Corpora­tion, 362 West Colorado Street, Pasadena 1, California, for Bulletin CN-25.

E Q U I P M E N T

Sonic Engineering lists among its four new ultrasonic emulsifiers the Mini-sonic-laboratory and pilot plant model. Funnel reservoir holds one gallon

sification with easier maintenance and lower initial cost.

All four models use a blade vibrating at 22,000 cycles per second. The liquids to be emulsified impinge in a jet stream onto the edge of this blade, cavitation occurs, and the emulsion is formed.

According to Cottell, his machines have received wide acceptance in Great Britain since he made his first one in 1951. He went into production in 1952; the emulsifiers have since been used in pharmaceutical, plastics, leather, chemical, paper, rubber, tex­tile, and food industries, among others.

Cottell has named his units Rapi-sonic, Autosome, Dispersonic, and Minisonic. The Rapisonic is designed for emulsions of high or low viscosity at rates up to 350 gal. per hr. It has a gear pump and ultrasonic head, is driven by a 2 hp. motor. It does not emulsify air into the mix, Cottell says.

Autosonic emulsifier is designed to provide a continuous supply of emul­sion geared automatically to process volume. Oil, water, and emulsifying agent are pumped separately into the unit with separate control of flow rate to maintain proper proportions. Float switches start and stop the pumps as needed to keep a constant level of emulsion in the reservoir. The emul­sifying unit itself, however, is the same as is in the Rapisonic.

The Dispersonic handles dispersion of powders in liquids or abrasive emul­sions. It has the same vibrating head, but substitutes, for its abrasion resist­ance, a continuous cavity pump for the gear pump of the Rapisonic. This unit can put out 300 gal. per hr., ac­cording to Cottell.

For batch operations on a laboratory or pilot plant scale, Cottell has the

8 0 C & E N J U N E 10. 1957

E Q U I P M E N T

Minisonic. It uses the same principle, has a one-gallon feed reservoir. Prog­ress of the emulsification can be watched through the transparent tub­ing running from the ultrasonic head to the reservoir.

Sonic Engineering has set up lab facilities at Stamford to handle testing of samples on the machines. Ε 2

• Eclipse Air Brush is now in produc­tion with its electric test panel spray­ing unit designed to standardize ap­plication of paint to test panels. Ε 3

Lab Ware . . . • Comroe Laborator ies ' newest water demineralizer works off the tap at S to 10 gal. per hr., producing water with a specific resistance of 2 million ohms or more, the maker says. T h e resin, in a 7 in. polyethylene tube, can re­move about 200 grains of hardness as NaCl. Ε 4

• Technical Associates is offering a set of 30 calibrated absorbers mounted in

-î^/ yyi^^:*^ps^^ ι-

φ Looks Normal to the Sun Exposure panels for paint, plastics, and the like, when placed on this equatorial mount set up at Phoenix, Ariz., are al­ways normal to the sun's rays, main­tained that way to get more sun hours exposure in a given test period than are received by ordinary panels set at 45° (background). Coleman Caryl of Desert Sunshine Exposure Tests says tiiat in one three-month test period panels on this mount got 19% more langleys (gram-calories per sq. cm.) and 2 7 % more ultraviolet sun hours than panels on stationary mount did.

Lucite rings. Set is useful to establish absorption curves to check radiopurity of isotopes or to estimate isotopic composition. Ε 5

• Finger tip fluid dispenser , by Palo Laboratories, is designed for use with bottom-tubed aspirator bottles with gravity or siphon feed. Unit is at­tached to any flat surface, such as a shelf, is said to prevent loss or con­tamination of the liquids dispensed through it. Ε 6

• Micro melting point a p p a r a t u s made by Weka in Germany is being distrib­uted in this country by Epic. It comes either with a thermometer or with a thermo element and galvanometer. Ε 7

• Pioneer Plastics is now making cheap, 5 ml., disposable, polyethylene cups for p H samples. Cups will not

scratch electrodes and will fit s tandard holder. Ε 8 • Ultramicroburet , by Scientific Indus­tries, Inc., delivers by the turn of a handwheel (one revolution = 0.1 ml.)» holds up to 7 ml., and can be read to 0.0001 ml., the company says. Ε 9

• American Agile has a new line of extra-heavy-walled polyethylene jars. Available in one and two quart and one gallon sizes, jars have a locking cover to reduce leaks. Ε 10

(Continued on page 110)

ι F u r t h e r u s e f u l i n f o r m a t i o n o n | k e y e d E q u i p m e n t i t e m s m e n -j t i o n e d is r e a d i l y a v a i l a b l e . . .

. Use handy coupon on page 82 ^

June 1 0 , 1 9 5 7

Readers' Information Service U s e this h a n d y self m a i l e r to o b t a i n f u r t h e r i n f o r m a t i o n or l i t e r a t u r e .

Simply mark, clip coupon, fold, and mail

Every w e e k C&EN 's ed i t o r s survey a l a r g e v o l u m e o f v a l u a b l e sc ien ­t i f ic , t echn i ca l , a n d business i n f o r m a t i o n issued in t h e f o r m o f p roduct -announcements , b o o k l e t s , c a t a l o g s , d a t a sheets , e tc . This m a t e r i a l is d i g e s t e d a n d p r e s e n t e d in seve ra l d e p a r t m e n t s . For y o u r c o n v e n ­ience this c o u p o n is p r o v i d e d to f a c i l i t a t e reques ts f o r f u r t h e r i n f o r m a ­t ion o n these i tems as w e l l as o n p r o d u c t s a n d serv ices m e n t i o n e d i n adve r t i semen ts .

Ο

N a m e

C o m p a n y

S t ree t

C i t y

Posi t ion

Z o n e -(Please print or type)

_ S t a t e

• CLIP COUPON—Fold Along This Line—Fasten (Staple, Tape, Glue)—MAIL <4

To:

3 c

STAMP

Readers' Information Service Chemical and Engineering News 430 Park Avenue New York 22, Ν. Υ.

FASTEN HERE ONLY ^ ^ FASTEN HERE ONLY

M I S C E L L A N E O U S Advertising of Classifications Not Included irt Directories

On Preceding Pages

BUSINESS OPPORTUNITIES

PROFKSSOR, French chemical engineering school, visiting t he US, A-xigust and September, would appreciate industrial and academic con­tacts, leading to: exchange» of persons ; challeng­ing positions; r ' ^earch contracts; educational aid. Rev. Gerard Lepoutre (Catholic University), 13 Rue de Toul, Lille, France.

PUBLICATIONS —SALE, WANTED

BOUGHT AND SOLD—Complete sets, short runs, and single volumes o f scientific periodicals - -in all languages. Walter J. Johnson, Inc., 125 E. 23rd St., New York 10, X. Y.

CHEMICAL ABSTRACTS for sale, all vol­umes and issues in the vol cornes 1—46. C.E.N. Ash 1 ey, 27 E. 2 1 ; gsT.Y.C. (10)

BACK ISSUES of near ly all volumes of ACS journals are available promptly from the Ameri­can Chemical Society. Wxite for quotations on volumes and sets to: R:ick Issues Dept., ACS, 1155— 16th St., N.W., Washington 6, D. C.

FOR SALE: Ind. & Eng. Chem. vols 22 through 43: Anal. Ed. I.d-E.C. vols 2 through 22; Chemical Abstracts vols 31 through 41; Jour. Amer. Chem. Soc. vols S3, 54, 55. Unbound. ( lood condition. What a m I offered? Box 902-H-6. C. & Ε. Ν., lEaston, Pa.

FOR SALE USE» and R E B U I L T EQUIPMENT

F O R S A L E Two Sharpies Super Centrifiiçres, Electri­cally Driven. $2500.00 eacH. Also one Laboratory Model Sharplee, one Freeze Dryer and miscellaneous other equipment. Write.

I. H . B a k e r 2127 4th S t r e e t Berkeley 10, California

F O R S A L E : 2 sets calender rolls, 62' width, 20" dia.

rolls, max. opening 3" . Controls so full mesh is retained on gears regardless of roll position. Full set spare parts availaJble. HAVEG INDUSTRIES ° Attn. : M r . Sco t t , Morris, P l a n t M a n a g e r , 9O0 G r e e n b a n k Rd., Wi lming ton 8 , D e l a w a r e

USED or REBUILT EQUIPMENT

» For Sale · For Rent • Wonted to Buy

• Now these new sections a r e available to advertisers in C&EN's MISCELLANEOUS section. • Direct your advertisement to the largest single buying audience in the chemical and process industries—8!Z,OO0 C&ENews cov­erage.

• Cost: $20.00 per column Inch. Column •width. 23/ιβ". Minim-tarn disjplay, one col­umn inch, accepted in multiples of one-inch units thereafter. Cuts accepted—for best printing, 110 screen. No agency or cash discounts. • Make C&EN's MISCELLANEOUS sec­tion your shopping center. Send us your advertisement now stud lest for yourself C&EN's strong buying readership.

CHEMICAL & ENGINEERING NEWS Advertising Department

430 Park Avenue, Mew York 22 , Ν. Υ.

ARE YOU USING THE READERS' INFORMATION SERVICE?

in This Issue Your RIS Coupon Appears on Page 82

ACS ed i to r s sc reen all manufac­t u r e r s ' p roduc t a n n o u n c e m e n t s and indus t r ia l l i te ra ture , pub l i sh­i n g only wha t is really n e w a n d c o n t a i n i n g valuable scientific o r t echn ica l data.

Y o u can trust the j u d g m e n t of ACS ed i t o r s no t t o clut ter R e a d e r s ' In­fo rma t ion Service w i t h i t ems of doubtful value s imply to p rove " r e a d e r s h i p . "

Every chemis t , every chemica l eng i ­nee r shou ld m a k e cer ta in he k e e p s u p to date by:

(1 ) Subsc r ib ing a n d r e a d i n g t h o s e ACS publ ica t ions w h i c h serve h i s par t icu la r field.

(2 ) Examin ing carefully t h e ad­ver t i s ing pages in ACS publ ica­t i o n s , for they c o n t a i n scientific a n d t echn ica l data second on ly in i m p o r t a n c e t o the edi tor ia l p a g e s .

(3 ) Bu i ld ing u p a substant ia l re fe rence file of manufac ture rs ' l i t e ra ture to p rov ide valuable in­fo rma t ion quickly.

The following ACS publications:

Journal of Agricultural and Food Chemistry

Analytical Chemistry

Chemical and Engineering News

Industrial and Engineering Chemistry

p r o v i d e R e a d e r s ' I n f o r m a t i o n Serv­ice. Ju s t c i rcle the i tems you w i s h to receive, mail , a n d ACS service wi l l b r i n g wha t you w a n t p rompt ly .

YOUR RIS COUPON

IS ON PAGE 82

EQUIPMENT (Continued from page 81)

Instruments . . . • Fisher Scientific has developed an in-

I strument for analysis of aUoys by elec-I trodeposition on a platinixm electrode. I Both current and current density can

be manually controlled. E l l

• Atlas Laboratories is now producing an improved portable instrument for measurement of explosive gases in air. Instrument is factory calibrated for methane and ethane, can be obtained calibrated for other gases. Ε 1 2

• Central Scientific has begun produc-! tion of its gas chromatographic instru­

ment which it showed for the first time at the Pittsburgh conference on analyti­cal chemistry (C&EN, April 1, page 77) . ' Ε 13

I • Tracerlab is now producing a high [ sensitivity, thin window flow counter I for low energy beta emitters. The I Model TGC-14 Carbon Counter can be I used with a variety of detectors and I any Tracerlab scaler b y connection I through a P - l l preamplifier. Ε 14

• Gaseous diffused junction transistor, claimed to be the industry's first com­mercially available, can now be ob­tained from Texas Instruments. The silicon transistor has a rating power dissipation of 37.5 watts a t 25° C. and 15 watts at 100° C. C 15

Processing I • Suction filter assembly made en-I tirely of plastic is now being made by I Haveg Industries. Prices are competi-I tive with stoneware and rubber lining, I company says. And, service tempera­

ture is 350° F. E 16

• Richardson Scale has introduced a I portable scale for loads from 200 to I 1000 lb. I t is designed t o pick up ma-I terials located at various parts of a I plant and dump them into processing I equipment. Ε 17

• Net weigher , by B. F. Gump Co., is designed to feed, weigh-fill, pack, and eject cans to a conveyor automatically at rates of 15 to 145 pe r minute. It can handle powdered and granular feeds, the company says. Ε 18

• Gardner-Denver 's n e w small com­pressor is said to provide oil-free air for

I instrument controls and processing uses.

I Unit has carbon parts needing no oil or water lubrication, supplies 4 to 5 cu. ft. per min. E 19

1 1 0 C & E N J U N E 10, 1957