juice processing, all vitamins and minerals are contained in the liquid extract, and the simple addition of water restores the* concentrate to its original state, with flavor intact. The advantages of this dehydrating method extend t o chemical and pharmaceutical processing, and t h e handling of blood plasma, according t o the Commonwealth industrial research organization.
'P'iodaetd €UUC &*9ce&àeà. Ethylene
Thiourea
lications, including t h e OTS weekly "Bibliography of Scientific and Industrial R e ports'* a n d the quarterly index to t h e bibliography. John C. Green, director of OTS, revealed that businessmen are currently buying O T S reports on German technology and American research at t h e rate of $1,000 worth a day. The reports are priced at 10 cents to several dollars each. Abstract» of t h e reports are contained i n the weekly bibliography, available by subscription a t $10 a year.
Ethylene thiourea, a reactive heterocyclic compound with the structure CHs—NH\ | C = S , has recently been introCH 2 —NH/ duced in pilot plant quantities by the llohm & Haas Co., Philadelphia. This compound, more correctly but less conveniently named 2-imidazolidinethione, has a melting point of 203° to 204 °C, and is soluble in water to the extent of 2% at 30° C , 9% at 60° C , and 44% at 90° C. It is moderately soluble in methanol, ethanol, ethylene glycol, and pyridine but insoluble in most other solvents. The reactions of ethylene thiourea usually involve the tautomeric isothioCH 2 N^ urea form | C—SH, and include CH 2 NH/ alkylation, preparation of 2-aminoimidazolines, oxidation to sulfides or sulfuric acid, formation of methylol derivatives, and acylation. Ethylene thiourea forms complexes with a large variety of metallic salts. Ethylene thiourea is expected to be of interest as an intermediate for organic synthesis and in applications taking advantage of its salt-forming properties with metals. Samples and technical literature may be obtained by writing to the Special Products Department, Rohm & Haas Co., Washington Square, Philadelphia 5, Pa.
2 6,
NO.
12
>
.
Process
#fez^/HVDRÛ-KLOSER TAKES BUCK B R E A K I N G L A B O R OUT OF FILTER PRESS OPERATION I
Business firms and individuals in the Washington, D . C , area and firms maintaining representatives in Washington can now obtain immediate service on their requests for a majority of American and foreign technological reports distributed by the Office of Technical Services. Mimeographed and printed reports will be given out over the counter maintained for the convenience of local businessmen and Washington visitors in the lobby of the Commerce Department Building. Reports in photostat or microfilm form cannot be gotten this way, because usually only one copy exists and several days are required to process reproduction orders at the Library of Congress or other government libraries where the original report is deposited. However, the more popular reports have been mimeographed in quantity, to provide rapid distribution. The sales counter carries a stock of the more important current government pub-
Uses Chemicals
In 1947 in England 710,000 l o n g tons of war materials were broken down at Royal Ordnance factories a n d were found to be eminently suitable for "munition manufacture in reverse." A m o n g the mon» than £ 8 million worth of industrial materials recovered chemicals figure prominently. Ammonium nitrate, recovered from shells and bombs filled with amatol, is used either in the manufacture of commercial explosives or as : fertilizei, some being exported, while sodium picrate is recovered from lyddite filled shells an I used by manufacturers of dyestuffs and pharmaceuticals. Shellite is n o w being recovered and sold for conversion into picric acid, and potassium nitrate, recovered from gunpowder, i s either sold for export or used in Britain for bacon curing. Large stocks of surplus explosives such as T N T , tetryl, ammonal, gunpowder,
Complete designs for low-cost plants are in preparation by Commonwealth Kngineering Co., Dayton, Ohio, which will incorporate t h e use of a high-efficiency method for concentrating liquid solutions of less-than-eutectic mixture. T h e patented process involves three steps. T h e solution to be concentrated is completely frozen a n d the ice finely divided. Application of pressure to t h e crystal mass releases t h e concentrate in liquid form, leaving virtually all water as ice. I n fruit
I
OTS Reports Now More Easily Obtained
V O L U M E
Extraction
Peacetime for War
FOR HYDRAULIC CLOSING MECHANISM
HANDWHEEL
HIGH PRESSURE OU-. FROM HAND PUM
S C R E W STANDARD S E T SCREW-
N NOo W w you c a n equip your 2 4 * a n d larger Shriver Filter Presses with a really simple hydraulic closing device that's inexpensive, easy t o install and operate. It eliminates t h e hard labor a n d safety hazards of manual closing, and reduces opening a n d closing time considerably. This compact, self-contained, fool-proof Shriver Hydro-KIoser replaces t h e thrust obtained b y manual movement of t h e T. S H R I V E R M A R C H
2 2,
& COMPANY,
1948
screw with t h e straight thrust of the hydraulic ram. ram· A few e a s y strokes of the hand pump-close the filter press tight, and a locking n u t keeps it tight. T o open t h e press, the locking nut is released and t h e hydraulic pressure is then released b y opening t h e pump. The "Hydro-KIoser" "Hydro-KIoser' ' i s a real aid t o filter press operating e c o n o m y a n d convenience. Write for Bulletin 1 2 5 .
Inc., 8 6 2 Hamilton St., Harrison, N.J. 887
PRODUCTS
DRYERS · · · FOR SALE ITEM 1 Proctor & Schwartz Four Unit Dryer N o . K.-414-D, complete with Foxboro Temperature Controls, automatic feeding device, motor and starting equip ment and belt conveyor at the discharge end. Each section 6'-0" long X 8'-Ο* wide with a single stainless steel perforated plate conveyor. One beltdriven fan in each section and a separate variable speed drive on the feeder, conveyor and spreader. The top and side panels are two sheets of asbestos board with insulation between. All metals on the inside of the dryer, except the coils, are galvanized, cadmium plated or alloys. This dryer was installed in 1932 and a new conveyor was installed in same this year. Condition good. The replacement value of the above dryer is approximately $20,000.00.
ITEM 2 Proctor & Schwartz Six Unit Dryer N o . K.-1174-D, complete with Foxboro Temperature Controls, automatic feeding device, motors and starting equip ment. Each section 6'-0" long X 8'-0" wide with a single 3 X 3 Mesh No. 16 Galvanized wire screen conveyor. One belt driven fan in each section, two units up circulation and four units down circulation. There are separate variable speed drives on the feeder, conveyor and spreader. The top and side panels are two sheets of asbestos board with insulation between. All metals on the inside of the dryer, except the heating coils, are galvanized, cadmium plated or alloys. The dryer was installed in 1935 and a new conveyor was in stalled in same in 1946. Condition good. The replacement value of the above dryer is approximately $24,000.00.
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All t h e motors on the above dryers are connected for 220 Volt, 3 Phase, 60 Cycle current and in most cases could be reconnected for 440 Volt. This equipment will be available on March 1, 1948, and must be dismantled and removed from the premises, b y the purchaser or his agent, before April 1, 1948. G e n e r a l drawings can b e secured and inspection made if desired. Contact M r . J. H . Jeffery, Chief Engineer, Plaskon Division:
LIBBEY-OWENS-FORD T o l e d o , Ohio
GLASS
AND
PROCESSES
and gelignite have been sold to the ex plosives industries for conversion into types suitable for mining. T h e T N T arising from, the boiling out of surplus ammunition is burnt in specially designed plants. T h e carbon particles in the smoke are collected and sold as carbon black, which is used in the paint and tire industries. Phosphorus is also recovered from stores so filled, as it is in demand for the manufacture of various phosphates mainly used in the food industries. Bombs containing hydrocyanic acid have been sold and may possibly be used in fumigating ships or in the manufacture of printers' inks. Phosgene is used in syn thesizing organic chemicals, while cyano gen chloride has been sold to the dyestuffs industry. Cracker blank, which was used by the British Home Guard to imitate rifle fire, has been used in the manufacture of Christmas crackers, and some pyro technic stores have been sold for firework displays. T h e munitions thus disposed of included over 150,000 tons of U. S. am munition stocks in Britain which were acquired by t h e British government under an agreement early in 1946.
Product Notes
COMPANY
Telephone Walbritfge S611
Platinum Metal Catalysts—Concen trated forms and on carriers.
T h e Curran Ordnance Chemical Labora tory, Lawrence, Mass., has developed a compound said to be highly effective for degreasing a n d scouring scale, rust, and algae from radiator cores and engine blocks without harmful effect to the cooling system metal or hoses. The compound, called Gunk, needs no neutralizer or im mediate flushing a s is required by acid and alkaline compositions. It is a triphasé detergent of the organic type and possesses not only self-emulsifying properties but self-scouring action as well.
Laboratory Wares of all description. Sheet, Wire, Tubing, Gauze and Fine Foils. Salts and Solutions. Electrodes/ Stills, Retorts and other Special Process Equipment to order. Palladium, Iridium, Osmium, Rho dium and Ruthenium. We pay highest prices for scrap platinum and have facilities for prompt recovery of spent plati-t num. and palladium catalysts. WE INVITE YOUR INQUIRIES AND WILL SEND O N REQUEST FOLDERS: Ν - 2 0 , "Platinum, Gold one* Silver for Science, Industry and tha Art*" N - 2 1 , "Platinum and Palladium Catalysti".
THE AMERICAN PLATINUM WORKS 231
NEW
JERSEY
R. R. A V E .
PRECIOUS 888
METALS SINCE
N E W A R K 5, N . J . 187i C H E M I C A L
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American Cyanamid Co., Bound Brook, N. J., announces t h e use of an effective and inexpensive antistatic agent for use on fabrics where nylon or Vinyon Ν yarn predominate. Static electricity, which causes many types of freak reactions dur ing processing of fabrics, not to speak of reactions annoying to the wearer when made into garments, can now be virtually eliminated with Aerotex Softener H, ac cording to t h e company.
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A "stop-off" coating for selective hot dip tin plating, easily applied where it is necessary to prevent the adhesion of the tin, and which is said to withstand a muriatic acid pickling bath used in tin plating operations as well as the fluxing dip and molten tin dip, has been a n nounced by Acheson Colloids Corp., Port Huron, Mich. AND
E N G I N E E R I N G
NEWS
