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Elevated Pressure Adsorption of Methane on Activated Carbon: Effects of Contaminant Gases and Repeated Cycling. Adsorp-
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Principles of the Interpretation of Tracer Tests of Flow Syrfemo.
Presents some generally useful methods for the description of flow patterns and illustrates them with examples found useful in actual industrial situations.
tion isotherms were established for pure methane at 40° C. and 14.2 to 800 p.s.i.a. Addition of benzene, hydrogen, ethylene, and hydrogen sulfide decreased activated carbon’s adsorptive capacity for methane.
Kenneth B . Bischof, University of Texas, and E. A. McCracken, ESSO Research Laboratories
J. W . Muluihill, W . P. Haynes, R. J.Haren, and J. H. Field, Bureau
Ms. 65-459
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M S . 65429
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Study of Ion Exchange Processes for Nioblum and Tantalum.
Preliminary flow sheet developed for production of oxides, based on literature search. Cost estimates for fixed bed about the same as for solvent extraction; somewhat lower for continuous contactors. Research and development program needed to confirm optimistic assumptions and several probable advantages other than cost.
I t is shown that fog formation is related to Lewis number, and results of a rigorous, point by point calculation are appreciably different from those obtained when simplifying assumptions are made. Sample calculations are given. The Design of Cooler-Condensers with Fog Formation.
J . R. Goncalves de Sousa and Ernest J . Henley, University of Brazil
Duane L. Barney and Clifford E. Kent, General Electric Company M S . 65-447 38 pages (2Jgures, 11 tables) A
Diffusion
Approximation
Ms. 65-461
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Countercurrent
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Availability of pure sulfur would make one-step manufacture of HzS04 possible in a pressure reactor at about 300’ C. and 400 p.s.i. oxygen partial pressure. Fast reaction bypasses conventional burning of sulfur to SOz, the catalytic step to SOa, and final absorption of the gases. Rate affected by some foreign ions. The Aqueous Oxidation of Elemental Sulfur.
N. E. Day, University of Aberdeen, Scotland 5 pages
83.00
Theory.
By approximating the countercurrent process by the appropriate diffusion process, the distribution of solute can be obtained in the general case of extraction at both ends of the train and an unrestricted ratio of left or right transfers.
Ms. 65-453
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F. Habashi and E. L. Bauer, Monfana College of Mineral Science
Valeric Acid Esters of Cellulose. Cellulose valerate and mixed
and Technology
esters are prepared economically by conventional esterification procedure. Properties are described with emphasis on cellulose propionate valerate which shows high moisture resistance, good heat stability, compatibility with a wide variety of resins and plasticizers, and other desirable qualities.
Ms. 65-462 1 I Pages (3Jgures, 4 tables)
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J . W . Mench, B. Fulkerson, and G. D. Hiatt, Eastman Kodak Company
M S . 65-457 26pages (bjigures, 8 fables)
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Thermodynamics of Ternary, Liquid-Supercrltical Gas Systems with Applications for High-pressure Vapor Extraction. A good
semiqualitative picture of the phase behavior of ternary systems can be obtained from thermodynamic considerations and limited binary data. Criteria have been developed for choosing a suitable supercritical gas for efficient separation.
The Effect of Mass Transfer on the Stability of Miscible Displacement Fronts in Porous Media. Stability analysis shows
that mass transfer, like dispersion, can exert a stabilizing effect on miscible displacement fronts. A method for determining initial response of system variables to a perturbation in axial velocity is illustrated.
Dauid 0. Cooney, University of Wisconsin M S . 65-463
17 pages (2Jgures)
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J. R. Balder and J. M . Prausnitz, University of California M S . 65-458 28pages (QJigures, 1 table)
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(Continued on page 83) VOL. 5 8
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Results of biased steam distillation of methyl benzoate-camphor and ethyl salicylate-safrole from water, suspended with benzoic and salicylic acids, respectively, provides strong evidence in favor of formation of a n intermolecular hydrogen bond between binary system component and the biasing agent. Significance of size of molecules is explained.
Mechanism of Biased Steam Dlstillatlon.
Kim-Hok Koh, Bureau of Commodity Inspection and Quarantine, Taipei, Taiwan MS. 65-464 Subscribers 82.00 77pages (bfigures, I table)
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Factors Affecting Polymer Degradation by Sonic Irradiation.
Sonic irradiation studies have shown a direct relationship, independent of polymer chemical type, between shear lability of polyisobutylene and poly (n-octyl) methacrylate solutions and their viscosity-temperature improver power in oil blends. Loss of viscosity-temperature improver power varied directly with this polymer property.
R. L. LeMar, Rock Island Arsenal M S . 65-484 25pages (dfigures, 9 tables)
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84.00
Electrical Augmentation of Natural Gas Flames. Theory relat-
Microwave Excitation of Hydrogen in Gas-Solid Systems. Conversion of hydrogen to atoms in a microwave can approach
ing to diffuse electrical discharge, with performance characteristics of an improved, electrically augmented burner capable of maintaining a powerful 60-cycle electrical discharge in combustion products from a natural gas-air flame, with discharge in a completely diffuse mode.
Eugene J. Mezey and Joseph H. Oxley, Battelle Memorial Institute
C. Marynowski, Stanford Research Institute, B. Karlovitr, Combustion and Explosives Research, Inc., and T. J . Hirt, Northern Natural Gus Company M S . 65-466 73pages (12figures)
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Method for analysis of isothermal, constant volume data of irreversible reactions achieves goodness of fit and proper transformation of error simultaneously. A general computer program, with examples, is described.
The Precise Determination of Reaction Orders.
J . R. Kittrell, R. Mezaki, and C. C. Watson, University of Wisconsin Subscribers $4.00
M s . 65-470
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or even exceed 100%. Results are quite sensitive to flow rate pressure, microwave frequency, and system geometry. Hydrogen can be ionized and dissociated into atoms to fluidize a bed of tungsten particles in presence of considerable surface area.
M s . 65-488 3 1 pages ( I 1figures)
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Drying and Oxidation Rates for Linoleic Modifled Alkyd Resins.
Both rates increased with increased molecular weight. Increased oxygen absorption rate appears to be caused by inhibition of the free radical oxidation process and related to current gelation theory, which predicts microgel formation prior to physical gelation.
E. R. Moore, E. G. Bobalek, and J. R. Shelton, Case Institute of Technology M S . 65-490 lopages (3jigures)
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$8.00 Extrusion Discharge Rate Equations for Non-Newtonian Fluids.
Direct Process for Preparation of Small Particle Cellulose Nitrate. Product has average size of 2.4 microns, high bulk
density, and homogeneous molecular weight distribution. Novel features of process include reverse addition of nitration reactants, use of low amounts of nitrating acid and elimination of several conventional steps.
Alan M . Belfort and Robert B. Wortz, F M C Corporation M S . 65-471 75 pages (4figures)
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Exact uniaxial flow analysis gives working equations that may describe several groups of liquids. Solutions given for several cases. Flow analysis in compression extruder is still too complicated unless a separation of flows is assumed.
Arie Ram and Moshe Narkis, Israel Institute of Technology, H a q a M S . 65-495 19puges (4figures, 7 table)
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Gas Bubble Motion through Maxwell liquids. I. large Spherical Bubble. II. Small Spherical Bubble. Merits of a n Current Theory and Thickener Design. Discusses limitations of Kynch theory, develops a concept of “compression” and presents a possible third regime. Design procedures appropriate to present incomplete state of a r t are suggested.
Bryant Fitch, Dorr-Oliver Company M S . 65-472 48 pages (14figures)
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Removal of Scale Formers from Sea Water with By-Product
approximate evaluation of viscoelastic flow phenomena over more formal ways of attack are discussed, based on results obtained for a specific problem. The physical interpretation of dimensionless groups in analysis of viscoelastic flow is also considered.
Gianni Astarita, University of Delaware M S . 65-496 30 Pages ( I figure)
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Heat Conduction Involving a Moving Boundary. An Analytic Solution. Expressions for temperature distribution in two
Recovery. Process removes scale formers from sea water with simultaneous production of a phosphatic by-product suitable as a raw material for fertilizer manufacture. Pilot plant designed to treat 10,000 gallons of sea water per day was successfully operated.
phases and the position of the interface as functions of time are obtained.
Murre11 L. Salutsky and Phil Messina, W. R. Grace B Company
M S . 65-49?
MS. 65-476 !?pages (efigures, 4 tables)
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Kuan-Shih Yuan W u , State University of New York at Buffalo Subscribers
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Characterization of Silicones by Gel Permeation Chromatography. Describes a rapid, accurate method of analysis and
niques are described; also a numerical testing method for which a n illustrative example is given.
resolution for measurement of molecular weight distributions of silicone polymers. Technique uses continuous infrared absorption and is also useful for molecular weight determinations of other polymers.
R. P. King, Uniuersity of Africa
F. Rodriguez, R . A. Kulakowski, and 0. K. Clark, Union Carbide Corporation
Necessary and Sufficient Conditions for Inequality Constrained Extreme Values. Modifications of three standard search tech-
M S . 65-47? 19 pages (7 jigure, 2 tables)
Witwatersrand, Johannesburg, South Subscribers
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M S . 65-504
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20pages (9figures, I table) VOL. 5 8
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