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I N D U S T R I A L A N D E N G I N E E R I N G CHEMISTRY
VOL.
14, NO. 15
Resins for Cellulosic Impregnation OOD, pulp, and cellulose materials in many forms can be strengthened and given greater resistance b y impregnation with a new line of resins recently developed b y General Plastics Inc., North Tonawanda, N . Y . T h e resins eliminate the shrinking a n d swelling caused b y moisture absorption, and give greater resistance to solvents, acids, and alkalies, and greater impact strength and surface hardness.
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Shriver High-Pressure F i l t e r Press
Emanations T h e Wonders of Science
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H E following item is reprinted from a recent issue of t h e Boston Evening Transcript:
SHRIVER FILTER PRESS
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HE more recent development of certain new products in the process industries has called for operation at unusually high pressures in order to filter the extremely viscous materials encountered, particularly in the clarification of heavy cellulose solutions and kindred intermediates in t h e manufacture of rayon, transparent cellulose wrapping tissue, photographic film, synthetic resins, lacquers, and dopes. Filtration a t pressures between 350 and 1000 pounds per square inch is n o t uncommon. T o meet this requirement a type of Shriver filter press, made by T. Shriver & Co., Harrison, N . J., has been developed which combines features of design and ruggedness of construction in both filter frame work and plates and frames t o give adequate rate of nitration a t these high pressures, without leakage a n d produce nitrates of unusually high degree of clarity. The heart of*the filter press is t h e filter plate, with due recognition given to its materials of construction, design of drainage, feed and discharge, a n d leakage grooves. Several different types of filter plates are available t o meet the needs of each particular user. To date they have been built of stainless steel, monol metal, bronze, and electrogalvanized cast iron, each selected for corrosion-resistant characteristics as applied to the fluid handled. Special corrosion-resistant screens are fitted over t h e plates to support the filter cloth a t these high pressures. These filter presses are available in a wide range of sizes, for varying requirements in filtering area a n d holding capacity. Salt B a t h F u r n a c e N THE Ajax-Hultgren salt b a t h furnace, developed by the Ajax Electric Co., Inc., Philadelphia, Pa., the salt is heated by its own resistance between electrodes within the bath and t h e pot is set into insulating fire brick so t h a t all t h e heat generated by the current passing between t h e electrodes is transferred directly to t h e molten bath, and the wastage of fuel and destruction of pots are largely eliminated. This i- -uid to be the most practical electric unit ft*r production of salt b a t h hardening. The fumaci« is used for cyaniding, annealing, hnrui-iiing, and tempering.
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m: Oli! bury Electro-Chemical Co., T N:-..j-ira Falls, N . Y., has opened a New i . •: k ofhee at 22 East 40th St.
New Valve HE Homestead Valve Manufacturing Co., Coraopolis, Pa., announces a new valve incorporating in i t s design positive mechanical seating and unseating. I t is known as t h e two-handle lift-type plug valve. I t has been designed t o overcome operating obstacles encountered with high temperatures, high pressures, infrequent operations, corrosion, etc., m e t in power plants, steel mills, refineries, oil fields, paper mills, chemical plants, e t c .
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£T£!J , L/J3 Two HANDLE L I U - T Y P E PLUG VALVE
A mechanical leverage lifts t h e plug vertically from its seat sufficiently t o break the friction between plug a n d body and allows for t h e free rotation of t h e plug. By t h e same process, the plug is mecnanically reseated.
Correction—Mathematical Puzzle E R E G R E T t h a t an error was made W in setting type of t h e mathematical puzzle printed on page 284 of t h e N E W S EDITION of July 20. T h e position of two columns was so altered as t o make t h e puzzle meaningless as printed. The puzzle in its correct form is a s follows: xx) xxxxxxx( xx8xx xxx XX XX xxx xxx
W e a t h e r Worker f r o m t h e W e s t To the Editor of the Transcript: Mark Twain cried aloud many years ago that something b e done about the weather, but the Government paid no attention to him. Now, however, it appears something must be done, if possible. Not only the climate has changed, b u t the air we breathe appears to be heavy with elements we have not been accustomed t o . No study has been made of what finally becomes of the carbon gases liberated from gasoline and petrol oil consumption. Due to the great volume of these, it is believed such gases reach a stationary level and are drifting with wind and exerting pressure. These gases have a great heat-producing affinity for oxygen, which is readily taken out of water vapor, destroying same. Aside from this, these gases permeate the air and so finely divide the water vapor particles that these cannot coagulate as is usual, and form rain drops. I t is believed, and the facts are charged to be, that every molecule of carbon gas liberated in motor operations, and every electron liberated to air in radio and electrical operations, is absorbing light and reflecting and radiating unnatural heat, causing much of t h e drouth, and contributing largely to the burning out of peoples* eyes and the many untimely deaths that are occurring in the country. Forecasters here seem to rely on drifts of cold air coming in from the Pacific to "break the heat" and produce rain. This cold air must of course have Arctic origin, but was always greatly aided and induced by icebergs and ice floes coming down from the north. A t this time these are dynamited and destroyed on sight, and cold air seldom reaches the Central West. What should be done—more icebergs should be dynamited loose in the north and allowed to float naturally south undisturbed as these did many years ago. This would probably reproduce the pleasant climate and fertile soil conditions which we so much enjoyed in the days gone by. Springs, creeks, rivers and lakes are being dried up and t h e natural rains t h a t this evaporation would produce, are driven out of the country by pressure of electrical and radio vibrations a n d carbon gases, and these rains fall into t h e ocean. "Heavy rains over the ocean" is t h e recent addenda to weather reports. The Government has the facilities t o thoroughly go into the facts of this situation as here stated, and has the power to command changes in conditions that are found to be bringing ruin t o a great part of the country. ALBERT N . KANSAS CITY, M O . July 20
DEERSCHUK
