RESEARCH RESULTS . . . immediately available All manuscripts listed here are being considered for possible publication in one of the I/EC quarterlies. They are available to I/EC subscribers) and may be obtained at reproduction and handling cost. They should be treated in the same fashion as a personal communication. Use of the material in publications, or reference to it, should have the author’s approval. Please use the printed coupon, and include payment with your order.
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Total remittance (check)money order, cash) $(Payable to American Chemical Society) RESEARCH RESULTS SERVICE Industrial and Engineering Chemistry 1155 Sixteenth Street, N.W. Washington 6, D. C.
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Factors Controlling the Thickening of a Carboxylaled latex by a Polyacrylate Thickener
W. W. White, Naugatuck Chemical Division, U. S. Rubber Go. A statistically designed experiment was used to study factors controlling the viscosity response of a carboxylated styrenebutadiene latex system to a polyacrylate thickener. Surface area of latex particlesislargestfactor controlling viscosity buildup.
Ms. N o . 3 1 8
23pages, including Gfigures, 8 tables
of dry feeding the hydrate. Trial plant runs and simulative laboratory tests were performed concurrently. Advantages of quicklime include higher available CaO, lower cost of treatment and equipment maintenance, constancy of feed, freedom from flooding, less dust, increased storage and feed capacity, as well as stabilization of basin sludge.
MS.No. 408
23 pages, including 2 tables, 8Jgures
62.00
$2.00 O n the Dynamics OF a Flow-Forced Heat Exchanger
Effect aF Compression on the Shear Modulus of Rubber
Lowell E. Koppel, Purdue University
A . R. Payne, Rubber and Plastics Res. Assn. of Great Britain
T h e response of a flow-forced heat exchanger, with one distributed fluid and one constant temperature fluid, to an arbitrary flow disturbance was derived. A linear approximation to this solution was adequate to represent exchanger response for normal values of the pertinent parameters. For large magnitudes of step-change or for high heat-exchange to heat capacity ratios there may be significant error in the approximate solution.
Agreement between experiment and theory permits estimates of change in shear modulus for rubber mounts compressed by static load. Appropriate shape functions for mountings other than cylinders, and necessary values of constants, are also presented, so that actual design problems can be solved.
Ms. hro. 3 9 7
IOpages including a j g u r e s , 2 tables.
$7.00
M ~ N. ~ 4.1 3
70 pages, including 7 Jigure
$7.00
Carburization Rates of Tungslen Powders
Meyer L. Freedman, Refractory Metals Laboratory, General Electric Co. T o find out why tungsten powders of same particle size produce cemented carbides of different hardness, carburization rates were studied by differential thermal analysis and x-ray diffraction. Heat treatment increased carburization rate, which was structure sensitive. Tungsten carbide crystallization suggested as ratecontrolling step.
Ms. N o . 403
19pages, including 4 tables, 6figures
97.00
Estimation of Spout Diameter in a Spouted Bed
M. A . Malek, L. A . Madonna, and Benjamin C.-Y. Lu University of Ottawa, Canada
13pages, including 2 tables, 4jigures
Robert Stajin, Polytechnic Institute of Brooklyn H. Kenneth Stajin, Stevens Institute of Technology Techniques available to obtain a system transfer function from experimental sinusoidal frequency response data are presented. A potential analog approach is one of the fastest methods to obtain results usually within engineering accuracy requirements. T h e Bode graphical approach is most useful when poles and zeros are either all real or have few complex roots. Two digital approaches-gain and phase matching and gain matching, provide the most accurate solution.
Ms. No. 4 1 5
Spout diameters, d,, were measured for eight materials in two semicircular columns using air as spouting medium. T h e quantity dBin a spouted bed is proportional to the square root of mass flow rate of air. A generalized equation is proposed for estimating quantity d, under various conditions, requiring only mass flow rate of air and column diameter as primary information.
Ms. N o . 404
Process Transfer Function Approximation Using Frequency Response Data
$1.00
Direct Feed of Ground Quicklime, without Preliminary Slaking, for Water Treatment
A . Adler Hirsch, Dept. of Water @ Sewerage, City of Shreveport Direct dry feed of ground or pulverized quicklime from a rotary kiln is recommended for water treatment plants instead
34 pages, including 3 tables, 17 figures
$2.00
Electromigrations through Ion Exchange Particles and Membranes
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Over-all Specific Conductances of Exchangerdolution Su rpensions. Junichi Shimokawa, Japan Atomic Energy Research Institute A new type of conductance-measurement cell has been devised, and two analytical methods-a modified Maxwell-Eucken model and a n octahedral model-developed to replace experimental determinations of suspension conductance. Work believed to be the first specifically designed to show that most of the electrolytic conduction occurs through the resinous phase, if the external solution is very dilute.
Ms.No. 4 1 7
30pages, including 1 table, 12figures
VOL. 5 4
NO. 3
62.00
MARCH 1962
71
R E S E A R C H RESULTS Kinetics of Nickel Carbonyl Formation
TY. M .Goldberger and D. F. Othmer Polytechnic Institute of Brooklyn Within framework of observations made, rate of carbonyl formation was controlled primarily by surface reaction. Reaction rates were proportional to thermodynamic driving force, and diffusional effects insignificant. Activation energy calculated from the rate data was higher than expected from a diffusional process. Reaction rate data will permit further examination of rate-controlling factors, increase understanding of the role of the solid surface in gas-solid reactions.
ius. N o . 418
37 pages, including 74jigures
$2.00
An Analytical Approach to Plasma Torch Chemistry
measurements of the total pressure with time. Application is limited to kinetic analysis of simple gas phase reactions at constant T and V when the number of moles of reactants is different from that of products. Method is valid for gas reactants in pure state or diluted by inert gas. h i s . No. 4 2 6
10 pages, including 4 tables
Number of Transfer Units in liquid-liquid Extraction
James 0 . Osburn and I1Chu Choi, University of Iowa Chart is presented to find number of transfer units in extraction, if distribution curve and operating line are straight lines. Extends the Colburn chart to negative values of abscissa, the usual case when calculations are based on raffinate phase.
John E. Anderson and Laura K . Case Speedway Laboratories, Linde Co.
M s . N o . 427
Available thermodynamic and kinetic data have been applied to predict quantitatively the over-all results when hot hydrogen from the plasma torch is mixed with methane, and the mixture subsequently quenched. Analytical results agree very well with experimental data, and a better understanding of critical variables in this high temperature process has been gained.
Digital Computer Analysis of Distillation l o w e r Control
Ms.
.\To.
479
2 7 pages, including 8 figures
$2.00
Sulfur-Resistant Gas Storage Cylinders
J . F. Shuitr, F. S.Karn, and R. B . Anderson Pittsburgh Coal Research Center Gas mixtures with low concentrations of H2S and other sulfur 1CO) are stable when compounds in synthesis gas (1Hp stored in stainless steel, aluminum, or plastic-lined carbon-steel gas cylinders, if iron carbonyls arc removed from the synthesis gas. Plastic-lined cylinders cost less than one fifth as much as stainless steel or aluminum.
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IUS. N o . 422
8 pages, including 2 tables
$1.00
Characterization of Amberlysl 15, a Macroreticular Sulfonic Acid Cation Exchange Resin
Robert Kunin, Erich A . Meitrrier, James .4. Oline, Sallie A. Fisher, and Norman Frisch, Rohm LY Haas Co.
$1.00
7 pages, including 3 f g u r e s
$7.00
T . J . M’alsh and Dale H . Leauesiey, Thompson Ramo- WooEdridge, Inc. With a criterion of control for a continuous process, it will be possible to choose the best control conditions to minimize quality give away for a specified level of batch rejections. T h e theory of Frazier and Whitman is applied to evaluation of distillation column control and adapted to automatic feedback control. Should offer a significant advancement toward a completely automatic plant.
M s . N o . 429
45pages, including 7 3 j g u r e s , 3 tables
$2.00
Dynamic Simulation of a liquid-Liquid Extraction Pulse Column
John C. Biery andDaaid R. Boylan, Iowa State University Experimental transient response data were obtained on a 20-foothigh pulse column with a nitric acid-water-tributyl phosphate mixture. Transient response curves were compared with analytical curves produced by integrating various mathematical models in a n attempt to simulate the column behavior. A simple equilibrium stage model gave fair simulation of experimental data when the number of equilibrium stages was large.
New polymerization technique yields cross-linked ion exchange structure entirely different from conventional homogeneous gels, having a truly rigid macroporous structure similar to that of conventional adsorbents which is superimposed on the gel structure. Designated as macroreticular (MR) ion exchangers, potential utility is for applications in oxidizing atmospheres, nonpolar solvent systems, continuous fluidized systems, and catalysts.
Solution of Extraction Column Partial Differential Equations with Runge-Kutta Integration on a Digital Computer
IMS. N o . 424
John C. Biery and David R. Boylan, Iowa State University
l g p a g e s , including 7 0 f g u r e s , 2 tables
81.00
Application of a Reduced Vapor Pressure Equation to Nonhydrocarbon Substances
Enrique G . Reynes and George Thodos, N o r thwestern University T h e Frost-Kalkwarf vapor pressure equation expressed in reduced form has been applied to substances other than hydrocarbons to include elements, inorganic compounds, and organic derivatives. Vapor pressure data for over 32 substances were analyzed with the aid of a n IBM-650 digital computer. T h e group included both polar and nonpolar substances, and it was found that only one reduced vapor-pressure point is necessary to define completely the vapor-pressure function. M s . N o . 425
75pages, inchdin8 3jigures, 1 table
$1.00
M s . 62-3
3 1 pages, including 12Jgures, 2 tables
$2.00
T h e Runge-Kutta program was found advantageous in many respects. Large sets of equations could be integrated in a small storage capacity machine; nonlinear equations could be integrated readily and the integration was self-starting from initial conditions. T h e only disadvantage was the long integration time required to solve large sets of equations. This was minimized by using gridwork expansion technique.
Ms. 6 2 - 4
20 pages, including 4 f g u r c s , 2 tables
62.00
Polymeric ligands. 111. The Separation of Uranium from Solutions and Ore leaches with Salicylic Acid-Formaldehyde Polymers
R. C. DeGeiso, L. G. Donaruma, and E. A . Tomic E. I. du Pant de Nemours t Y Company, Inc. A Total PressureMethod of Kinetic Analysis
Leon S.Kowalczyk, University of Detroit A general method of expressing partial pressure of the selected reactant in terms of total pressure, or total pressure difference, based on the stoichiometry of reaction, initial pressures, and
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INDUSTRIAL AND ENGINEERING C H E M I S T R Y
A salieyclic acid-formaldehyde polymer has been used as a selective ion exchanger for separation of uranyl ion from uranium ore leaches. Uranium of good purity in high yields was obtained by the technique described.
Ms. 62-5
9 pages, including 2 fables
$1.00
