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Kinetics of Nitration of Benzene in a Continuous Stirred Tenk Reector. Rate equation based on acid phase is obtained for
A n Analytical Study of the Constant Pressure Specific Heat and the Velocity of Sound in the Supercritical Region. For simple
two feed acid compositions, with rates extended up to 40 gram moles per hour per liter of acid phase. Distribution ratio of nitric acid between two phases depends on acid composition.
substances with similar critical compressibilities, values for maximum specific heat locus and minimum velocity of sound locus appear to be independent of the identity of the substance in question. Polynomial expressions approximating values of each of these properties along its respective locus are given.
K . R. Das and P. Bhimeswara Rao, Indian Institute of Technology, Madras, India
MJ.66-488 35 pages (7jigures, 9 tables)
Subscrzbers $4.00 Nonsubscribers $8.00
A . Piekut and S.S. Lestz, Pennsylvania State University
MS.66-503
Subscribers $1.00
10pages (4jgures)
Experimental Investigafion of the Lamlnar-Turbulent Transition for Newtonian Flow in Rectangular Ducts. The theoretically
predicted minimum critical Reynolds number as a function of aspect ratio is verified experimentally. Four rectangular ducts with aspect ratios bracketing the predicted minimum were used. These data quantitatively verify the theory providing firm proof of its validity.
Richard W. Hanks and Dae S.Song, Brigham Young University
MS. 66-497 8 pages (2fisures)
Subscribers $1.00 Nonsubscribers 82.00
Nonsubscribers $2.00
Catalytic Oxidation of Propylene in a Stirred Reactor. Highest yield of 56.2% acrolein was obtained a t 5.6’% conversion. At a
higher conversions (47.6%) were sacrifice in yield (14.1 70) obtained. Effects of a number of reaction variables on conversion are reported. Data for product distribution as a function of operating conditions are presented.
R. Lakshmanan and D. Rouleau, Ecole Polytechnique, Montreal, Canada MS. 66-504
Subscribers 82.00
73pages (4Jgures, 1 table)
Concentration Polarization Effected in Reverse Osmosis Using Porous Cellulose Acetate Membranes. Analytical expressions
were developed for solution systems in turbulent or laminar flow in rectangular channels between flat parallel membranes. Results are illustrated using data for a set of membranes involving a wide range of solute separations. Some factors relating to economic analysis are indicated.
Nonsubscribers 84.00
A Method for Preparation of Pure Chlorine Dioxide. Reactions of chlorine and sodium hypochlorite with sodium chlorite in presence of acetic anhydride are described. A yield of about 95% pure chlorine dioxide can be produced in a reaction suited for continuous operation. Scope and limitations of the process are discussed.
Shop Kiumra and S. Sourzrajan, National Research Council, Ottawa, Canada
Willy Masschelein, Ccmpagnie Intercommunale Bruxelloise des Eaux, Brussels, Belgium
Ms. 66-499
MS. 66-507
27pages (12jgures, 7 table)
Subscribers $3.00 Nonsubscribers $6.00
A Conjugate Gradient Method for Nonlinear Programming.
Subscribers $2.00
75pages (5/igures, 4 tables)
Nonsubscribers $4.00
Thiourea Inclusion Complexes with Terpenes and Stabilization of Essential Oils. Reduction of terpene content in essential
New method treats subclass problems characterized by linear constraints. I t effectively and continually uses the local quadratic properties of the general nonlinear objective function without requiring calculation of second partial derivatives, and can be used to solve quadratic programming problems.
oils by formation of inclusion complexes with thiourea offers a n alternate and perhaps simpler method of stabilizing odor, color, and appearance of essential oils.
D . Goldfarb and L. Lapidus, Princeton University
MS. 66-508
Ms. 66-500 31 pages ( 2 tables)
Subscribers $4.00 Nonsubsciibers $8.00
C.Askitopoulos, Athens Institute of Technology, Greece Subscribers $1.00
6pages ( 2 tables)
Nonsubscribers 82.00
(Continued on page 97) VOL. 5 9
NO. 2
FEBRUARY
1967
95
ACS Laboratory Guide
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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
RESEARCH RESULTS Operating Experience with TVA’s Stainless Steel Thermal Phosphoric Acid Production Plant. Ortho and superphosphoric
acids produced at concentrations equivalent to 85 to 115% HaP04. Startups and shutdowns easy. Operating conditions easily changed to produce desired concentration. Recovery of Pz06 is equivalent to 99.9% of phosphorus burned. Product used in solid, liquid, and suspension fertilizers.
H . Y . Allgood, F. E. Lancaster, Jr., J . A. McCollum, and J . P . Simpson, Tennessee Valley
M S . 66-509 3 6 pages ( 8 j g u r e s , 3 tables)
Subscribers $4.00 Nonsubscribers $8.00
Particle Size Distribution In Compacts of Solids. Data are given using upper limit equation. Standard deviation is a characteristic of material. Mean diameter of size distribution is related to the material particle size and surface energy, compact diameter, and compaction pressure. .il
Y . B . G . Varma, T . Gopichand, and D. Venkateswarlu, Indian Institute of Technology, Madras, India M s . 66-510 18 pages (9fgures, 3 tables)
Subscribers $2.00 Nonsubscribers $4.00
Stability of Plane Poiseullle Flow of Slightly Viscoelastic Fluid. Consideration is given to a fluid with a constant viscosity and normal stress differences which vary linearly with shear rate. I t is shown that elasticity lowers the critical Reynolds number a t which instability occurs.
C . F . Chan M a n Fong, University of Delaware
M s. 66-514 70pages
They can shoot down tough process problems. Sure and quick solutions come right out of the sure, quick facts you find in CHEMICAL ENGINEERING CATALOG. Turn your trigger-finger loose in the 5-way index. Facts come tumbling out-all the latest facts about equipment, materials of construction and specialized services. The facts you need when you attack a processing problem. Facts are like bullets, and CEC i s loaded with them! Ready, aim, fire. ENGINEERING CATALOG
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Laboratory experiments indicate 60 to 90% yields of ether by bubbling HCl gas into aqueous solutions of formaldehyde and methanol. Unreacted solute can be recovered for recycle to make 98% yields feasible. Data on effects of operating conditions are presented.
Chloromethyl-Methyl Ether Synthesis.
J . C. Bixel, Marathon Oil Company M s . 66-519 24pages ( J j g u r e s , 4 tables)
Subscribers $3.00 Nonsubscribers 86.00
Cocurrent [Oar-Liquid Contaacting in Packed Columns. New experimental pressure loss, liquid holdup, radial liquid distribution, ammonia absorption, and oxygen desorption data have been correlated empirically to form a systematic design procedure for cocurrent gas-liquid contacting i n packed columns.
L. Philip Reiss, Shell Development Company M S . 66-524 53pages (78fgures, 3 tables)
Subscribers $6.00 Nonsubscribers $12.00
A New Concept in the Stabilization of Ammonium Nitrate Prills. Proper selection of nucleating agents and improved
prilling process produces prills that are stable under almost all conditions of manufacturing, storage, and transportation. A guaranteed 34.50/, nitrogen content is feasible, and savings to producer are in the $4 to $5 per ton range.
Vincent J . Russo, The Chemical and Industrial Corporation M S . 66-525 78 pages (13fgures, 5 tables)
Subscribers $2.00 Nonsubsnibers $4.00
A Plate Type Heat Exchanger
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1. Extremely high heat transfer efficiency 2. Rapid thruput 3. Minimum liquid hold-up The ideal equipment for processing liquids that are subject to thermal separation, degradation, or thermal decomposition. In the APV, heat exposure is reduced to seconds. These and other features of flexibility, accessibility and economy are a l l described in a new brochure, “APV Equipment for the Process Industries.”Send for your copy today. Plate surface area, increased by corrugating creates turbulence and improved efficiency.
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