R E S E A R C H RESULTS ,
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Amine-Complex Curing Agents for Epoxy Resin Coatings
Maldhew T. Gladstone, Behr-Manning Company
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Destruction of the Caking Properties of Coal by Pretreatment in a Fluidized Bed
Structures described give improved pot life to solutions of solid epoxy resins at 100' F., permit cure at higher temperatures.
Albert J . Forney, Richard F . Kenney, Stanley J . Gasior, and Joseph H . Field, Bureau of Mines
Mr. 63-308
Comparison of Different Types of Equations for the Estimation of Vapor Pressures
Treating fine coals at 400' to 425' C. with a fluidizing gas (either inert gas or steam containing a t least 0.2'% oxygen) destroys caking properties. A completely nonagglomerating char produced in minimum of 5 minutes. Chars can be used as feed for fluidized-bed gasification or a hydrogasification process.
Donald G . Miller, University of California
M s . 63-360
75pages, including Gfigures, 3 tables
82.00
Various vapor pressure equations are extensively compared with experimental data to find best one for estimating vapor pressures to 10% with a minimum of input data. Recommendations are made for both high and low pressure regions and for different combinations of input data. MS.63-353
3 8 p a g q including 6 tables
Capacity limitations of Conventional Development of a New Type of Tray
$4.00
Distilling Columns.
Capacities are correlated for those distilladon towers which are limited only by free space drop break-up. High capacity developmental trays for distillation exceed free space velocity limits by utilizing centrifugal de-entrainment of droplets. 22 pages, inrluding 17 figures
$3.00
Smoothing Against the Average-A N e w Method for Smoothing Several Sets of Data Simultaneously
Stephen R. Cohen, City University of New York
$3.00
Resolutions of d/-2,3-Dichloro-2-methylpropionic Acid
Charles E. Blassick and W. E. Adcock, Rohm @ Uaas Go. Three bases-quinine, cinchonine, and d-a-methyl benzyl amine-all gave the levorotatory isomer of 2,3-dichloro-2methylpropionic acid. T h e biological activity was nearly identical with the activity of the racemic acid.
M s . 63-362
Earl Manning, Jr., Shell Oil Go.
MS. 63-355
23pages, including 7figures, I table
5 pages
Raschig Synthesis of Hydrazine. Hydrazine from Chloramine
$1.00
Part II.
The Formation of
G. V. Jeffreys and J . T. Wharton, The University o/ Manchsstcr, Manchester, England Pilot plant study in which hydrazine forming stage has been investigated in a continuous tubular reactor capable of operating at pressures up to 1000 p.s.i.g., and temperatures up to 250' C. using four methods of preparation.
Sets of data which vary similarly with the independent variable can be smoothed against each other by a new method which is suitable for both very precise and very imprecise data. Two examples are given.
Ms. 63-363
M s . 63-358
Effects of Solid Thermal Properties on Heat Transfer to Gas Fluidized Beds
16 pages, including 3 tables
$2.00
Destruction of the Caking Quality o f Bituminous Coal in a Fixed Bed
Stanley J . Gasior, Albert J . Forwy, and Joseph U.Field, Bureau of Mines Technique developed offers promise, from economic standpoint, as part of integrated coal pretreatment and high pressure steam-oxygen-coal gasification process. Preliminary benchscale tests indicate that char from high-volatile bituminous coal can be gasified without caking, with steam in fixed bed a t 800' C. and atmospheric pressure, and with hydrogen in a dilute-phase free-falling bed at 750' C., 3000 p.s.i.g. M s 63-359
2 3 p a g q including &'figures, 2 tables
$3.00
24pages, including PJgures, 7 table
$3.00
E. N. Ziegler, L. B. Koppel, and W . T. Brazelton, Argonne National Laboratory Heat transfer coefficients measured from a porous sphere and a cylindrical heater to beds of solids fluidized in a n air stream. Solids varied only in thermal properties. A model developed which predicts observed relation of heat transfer coefficient to solid thermal properties. Predictions agree with previous data on effect of gas conductivity and on maximum observable Nusselt number.
Ms. 63-366
4Opagcs, including Sfigures, 2 tables
WOO
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NO. 1
JANUARY 1964
73
These WhirlJet nozzles all produce the same type of hollow cone spray. Each is made of a different material however to meet various requirements in corrosion and erosion resistance. All nozzles are available from stock in a wide range of capacities. For unusual applications special materials are also supplied. For information, write for Catalog 25. SPRAYING SYSTEMS CO.
Circle
No.
38 in
No.
325'1 Randoloh S t
Bellwood 111
33 on Readers' Service Card
the Advances in Chemistry Series
SALINE WATER CONVERSION-II Three years of important wcrk in this active research area are represented i n this new volume on saline water conversion. The 14 papers it offers were based on symposia sponsored by the Division of Water and Waste Chemistry at the 139th and 141st National Meetings of the ACS i n March 1961 and March 1962, respectively.
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Different methods reported here include: spray evaporation phosphate precipitation vibration . wiped thin-film distillation , . the use of the diffusion still . . the use of the osmotic membrane . . flash evaporation utilizing solar energy. Cost problems are fully covered. There are abundant charts and illustrations.
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Authors are drawn from universities and industry, research institutes, government. They provide experimental data and discussion from work in the U. S., Canada, Australia, South Africa and Israel. Both basic and applied research is covered. All those concerned with technical aspects of saline water conversion will want this up-to-date compilation of significant papers on the subject. 199 pages.
Paper bound.
Price: $6.00
Order from: Special Issues SaleslAmerican Chemical Society 1155 Sixteenth Street, N. WJWashington 6, D. C. Circle NO. 5
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INDUSTRIAL AND ENGINEERING C H E M I S T R Y
RESEARCH RESULTS
CENTRIFUGAL SEPARATION
J14U
Recycle in liquid Extraction
Robert E. Treybal, Arew York University I n mixer-settler extractors, recycling that liquid which the solute distribution favors from the settler to the mixer can materially increase the stage efficiency. When distribution favors the dispersed phase, the volume of a cascade, and hence the cost, may be substantially reduced. MS.63-369
76 pages, including 5Jgures
$2.00
Ion Exchange Resin Catalysis of Sucrose Inversion Fixed Beds
Eldon W. Reed and Joshua S. Dranof, Columbia University Data indicate that observed rate of reaction is strongly influenced by diffusion within the resin particles, and that external (film) mass transfer is not significant over a wide range or Reynolds numbers.
Ms. 63-372
79 pages, including 4Jigures, 2 tables
82.00
An Evaluation of the Production of Hydrogen b y Gasification of Coal Using Nuclear Heat
W. H. Heffner, L. J. Pieroni, R . P. Gripn, ana‘ G . T. Skapcrdus, M . W. Kellogg Company Hydrogen can be manufactured from 20-cent/MMB.t.u. coal a t cost competitive with existing processes using 40-cent natural gas or 25-cent fuel oil, if high temperature nuclear reactor can be developed to deliver 2500’ F. process heat a t 50-centjMMI3.t.u. Optimum gasification conditions for a West Virginia bituminous coal and North Dakota lignite given.
Ms. 63-374
30 pages, including 5jqures, 3 tables
$3.00
Velocity, Temperature, and Concentration Distributions during Fiber Spinning
Richard M . Grzfith, American Cyanamid Company
It illustrates a n d describes
WESTERN STATES CENTRIFUGALS and points out exclusive, bonus features which will renew your hope for the ultimate in mechanical equip ment. Your request also will bring an application questionnaire which will reveal the factors necessary to convert your requirements into mechanical terms. Ask for Eullerln No. 3140. It’s FREE, and you’re welcome.
WESTERN STATES 1714 FAIRGROVE AVENUE
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Circle No. 80 on Readers’ Service Card
Several distributions have been determined outside a fiber during wet spinning of a single filament. The transition from laminar to turbulent flow was correlated. Elastic forces generated within the spinnerette were found responsible for most of the tension ordinarily needed in spinning fiber. M s . 63-378
25pages, including Sfgures, 4 tables
$3.00
The Determination of the Partition Coefficient of 2-Methoxy ethanol between JP-4 Jet Fuel and Water
Daniel A . Netzel, Midwest Research Institute Partition coefficient is independent of phase volume ratio and initial 2-methoxyethanol concentration in JP-4 fuel. Derivation of partition coefficient equation used to determine maximum “buildup” of solute in aqueous phase with continuous exchange of solvent JP-4 jet fuel containing the solute is given.
M s . 63-379
15pages, including dfgures, 3 tables
82.00
Xanthation of Starch by a Continuous Process
C. L. Swanson, T. R. Naffziger, C. R. Russell, B. T . Hofreiter, and C. E. Rist, Northern Regional Research Laboratory
Starch xanthates made on small scale by new, rapid, continuous process. Effect of reaction variables on conversion discussed ; chemical costs reported. Process provides efficient source of cereal products which have good potential for improving strength properties of paper and insulation board.
Ms. 63-387
28pagcs, including Sjgpures, 1 table
GENERAL SUPERINTENDENT For chemical-fertilizer plant in South America. Plant in city of 200,000 located on the Caribbean coast. Minimum salary 25% above U S A . equivalent position or more dependent on qualifications. Working knowledge of Spanish desirable but not necessary.
$3.00
Box 164,I & EC, Easton, Pa.
Radiotracer Analysis of Catalyst Flow Distribution
Donald E. Hull and Frank F. Ball, California Research Corporation Simultaneous recordings from an array of Geiger counters on a Houdriflow catalytic cracking plant showed that warped structures were distorting the flow pattern in the lower seal leg but not in the neck from the regenerator.
Ms. 63-384
25pages, including i’3fgures, 2 tables
83.00 VOL. 5 6
NO. 1
JANUARY 1964
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