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A n Improved Equation of State. A new modification of the equation of Redlich and Kwong adequately represents the critical isotherm and is applicable to substances with large acentric f a c tors. Computer programs for pure substances and mixtures are presented in Report UCRL19011,Lawrente Radiation Laboratory, Berkeley.
Otto Redlich, Victoria B. T. Ngo, University of California and Lawrence Radiation Laboratory, Berkeley
MS.6 9 - 3 5 6 I&EC Subscribers $4.00
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Vapor Phase Oxidation as a Process for Raising Octane Number. The process has been applied to five different virgin naphthas, a hydroformate, and a catalytic naphtha. T h e products, containing as much as 46 volume % ' of oxygenated compounds, on dehydration give a more orthodox fuel.
Jennings H. Jones, Merrell R. Renske, and Russell A . Rusk, The Pennsyluania State University Ms. 6 9 - 5 0 8 2 5 pages ( 2 figures, 11 tables) I&EC Subscribers $6.00 Nonsubscribers $1 2.00 Anhydrous Aluminum Bromide in Organic Solvents. Molten material was added to cyclohexane without any hazardous conditions being observed. The loss of A1Br3 value in solution was checked for a limited time. The effects of light, moisture, and heat on the stability of the solution were investigated.
Pankajkumar M . Trtvedt, Michigan Chemical Carp.
Ms. 6 9 - 5 5 9
1 9 pages ( 2 flgures, 2 tables) I&EC Subscribers $4.00 Nonsubscribers $8.00 Radical Polymerization of Allylisocyanurates with Vinyl Monomers. Radical copolymerization of di- or tris-(N-2-hydroxy,3-allyloxypropyl)isocyanurates (DHAIC) and (THAIC) with methyl methacrylate and styrene was studied, and rate constants were evaluated. Methyl methacrylate copolymerizes with DHAIC and T H A I C at a substantially higher rate than styrene.
Hydrogen Reduction of Alkali Sulfate. T h e hydrogen reduction of sulfate dissolved in molten alkali carbonate (600' to 85OOC) is autocatalyzed by sulfide and catalyzed by iron compounds. A kinetic study, which showed the reduction rate to be ipdependent of sulfate concentration, suggests that polysulfide is an intermediate.
J . R. Birk, C. M . Larsen, W. G. Vaux, and R. D . Oldenkamp, Atomics International North lAmerican Rockwell Corp. Ms. 6 9 - 5 6 5 2 6 pages (8 figures, 1 table) I&EC Subscribers $6.00 Nonsubscribers $1 2.00
Intraparticle Diffusion and Nonlinear Kinetics in Fixed Beds. Presents an algorithm which seems well suited to use with digital simulation languages (such as IBM 360 CSMP). Intraparticle diffusion, convective mass transfer between particle and fluid, and homogeneous nonlinear chemical reaction within the particle are accounted for.
James M . Wheeler, Eastman Kodak Go., and Stanley Middleman, University of Massachusetts
MS.6 9 - 5 6 6 I&EC Subscribers $4.00
Study of Interaction of Solvent and Catalyst in Coal Hydrogenation. Catalyst impregnated subbituminous Wyoming coal was hydrogenated in the presence of different solvents. Catalysts markedly improved conversions only with poor solvents. T h e solvent which had a nonpolar solubility parameter of approximately 9.5 appeared most effective. Coal size didn't affect this conclusion.
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Robert L. Goldsmith, Abcor, Inc. MS.6 9 - 5 7 6 5 7 pages ( 2 0 figures) I&EC Subscriberr $1 2.00 Nonsubscribers $24.00
Fluid Mixing Characteristics in Voil Spaces i n Packed Beds. Local and time variations of concentration were observed a t the exit of twodimensional packed bed. Local scale of perturbation was about 0.29 Dp, and time-scale of variation showed the origin of turbulence might be due to eddy shedding.
Motoyuki Suruki and Daizo Kunii, University of Tokyo, Japan MS.6 9 - 5 7 3 2 0 pages ( 8 flgures) I&EC Subscribers $4.00 Nonsubscribers $8.00 Characterization of liquid Solid ReactionsHydrochloric Acid-Calcium Carbonate Reaction. Reaction rate for flow through a reactive channel is predicted for first and second
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I Nos. Influence of Surface Turbulence and Surfactants on Gas Transport Through Liquid Interfaces. Results using a new technique indicate that a t high turbulence rates the statistical nature of interfaces may be described by a Danckwerts-type distribution function of surface ages. Nature of surface films and their stability against interfacial turbulence is discussed.
Thomas G. Springer and Robert L. Pigford, University of California, Berkeley Ms. 6 9 - 5 6 2 4 6 pages ( 1 0 figures, 5 tables) l&EC Subscribers $1 0.00 Nonsubscribers $20.00
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Macromolecular Ultratlltration with Microporous Membranes. Discusses factors controlling membrane flux and macromolecular rejection efficiency. Flux is limited by mass transfer conditions on feed solution side of membrane. Macromolecular rejection by membrane is determined by geometric properties of membrane pores and macromolecules in solution. Presents ultrafiltration data for macromolecular solutions.
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H. Alaminou, M . Michailov, and T. Michneva, Soja, Bulgaria Ms. 6 9 - 5 6 0 10 pages ( 3 figures, 2 tables) I&EC Subscribers $2.00
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G . R. Pastor, J. M . Angelovich, and H. F. Siluer, University of Wyoming MS.6 9 - 5 6 7 9 pages (1 figure, 1 table)
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RESEARCH RESULTS order reversible and irreversible heterogeneous reactions. An approximate boundary layer solution comparable to the exact solution is developed.
B . B. Williams, Esso Production Research Co., J. L. Gidley, Humble Oil t 3 Rejining Co., J . A . Guin, Purdue University, and R. S. Schechter, University of Texas Ms. 69-577 28 pages (6 figures, 5 tables)
Quasisteady-State Stagnant Film Evaporation with Moving Interface. A general model was developed for an evaporating liquid. Open and closed systems with variable transport area were considered. T h e model agreed with results from a slowly evaporating closed system of constant transport area.
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James M . Pommersheim, Bucknell University MS.69-580 2 2 pages (2 figures) I&EC Subscribers $6.00 Nonsubscribers $ 1 2.00
Comparison of Moments, r-Plane, and Frequency Response Methods for Analyzing Pulse Testing Data from Flow Systems. T h e three methods are used to fit the gamma distribution model with bypassing to experimental data obtained in a flow channel agitated by air bubbles. T h e s-plane analysis is recommended as the best of the three methods.
Quasilinearization and Estimation of Parameters in Partial Differential Equations. Lee’s technique is extended to partial differential equations with nonlinear boundary conditions. Convective and radiative heat transfer coefficients are obtained from an equation that models the transient heating of a bed of spheres.
J . L. Johnson, L.T. Fan, and Y.S. W u , Kansas State University Ms. 69-578 61 pages (4 figures, 5 tables) I&EC Subscribers $ 1 4.00 Nonsubscribers $28.00
V . G. Fox, L. lV. Ross, and K. D . Van Zanten, UniLersitj of Denoer Ms. 69-583 8 pages ( 1 figure, 1 table) l&EC Subscribers $2.00 Nonsubscribers $4.00
Carbon Black Feedstock from l o w Temperature Carbonization Tar. Selective hydrotreatment removes oxygen, nitrogen, and sulfur from L T C tar to produce a full-range, highly aromatic material from which carbon black feedstock is recovered by fractionation. Preliminary economics based on pilot data are presented.
Donald C. Berkebile, Harold h‘, Hicks, and W. Sidney Green, Ashland Oil and Rejning Go.
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Mass Transport in Reverse Osmosis in Case of Variable Diffurivity. Effects of practical ranges of linear, parabolic, and exponential diffusivity-concentration relationships on the concentration polarization in laminar flow were investigated. Theoretical results are interpreted in terms of their design application.
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