Engineering Commons^™

A Study Of Diffusion In Distillation., Joseph G. Duffey

Electronic Theses and Dissertations

A study of the mass transfer phenomena in fractional distillation was made. Small scale single slot, single cap apparatus was used to obtain the necessary experimental data.

The mass transfer coefficient KgA was calculated using several combinations of liquid and vapor compositions in the menthanol - water system under static liquid conditions. The correlation showed that KgA held about constant over the entire range of concentrations.

The problem of bubble area was studied and reasonable estimations of area, bubble frequency, and time of rise were made. This information is to be incorporated into the calculation of the mass transfer coefficient …

A Study Of The Effect Of Pigmentation On The Film Properties Of Ethocel : Part Ii. A Study Of The Effect Of Sun Light On The Color Of Pigments., Mansur Ahmad

Electronic Theses and Dissertations

The purpose of this investigation was to determine quantitatively the effect of pigmentation on the film properties of ethocel lacquer. This study was confined to the determination of tensile strength, percentage elongation at failure, softening and melting points of the films. Pigments were ground in the ethocel lacquer containing three parts ethocel, one part 276V-9 Dow resin and sixteen parts solvent by weight. Softening and melting points of the films were determined and were found to increase uniformly with increasing amounts of the pigments. The tensile strength of ethocel film with titanium dioxide as a pigment increased from 317 Kgm/Cm2 …

Relative Volatility Of Esters In Ethyl Alcohol-Water-Ester System., Yi-Chung Chang

Electronic Theses and Dissertations

The relative volatillities of five branch-chained esters with respect to ethyl alcohol in mixtures of ethyl alcohol and water containing small amounts of esters were determined experimentally. The results could be used in the design of distillation columns for ethyl alcohol purification.

For alcohol concentrations of more than 50 mol per cent, the increase of relative volatility of the esters was inversely proportional to the alcohol concentration. For dilute concentrations of less than 30 mol per cent the increase in volatility was very rapid, and the rates of increase were different for different esters. No simple quantitative correlation was established …

I. Improved Ice Meltage In Ice Boxes; Ii. Temperature Control In Tents - Winter Phase., Robert Beaman Duggan

Electronic Theses and Dissertations

This thesis consists of two parts: Improved Ice Meltage in Ice Boxes; Temperature Control in Tents - Winter Phase. Improved ice meltage in the Progress refrigerator is discussed in the first part of the thesis. This portion of the work shows that satisfactory refrigerator temperatures and flat ice meltage could not be obtained simultaneously when using V-shaped ice racks, although they could be obtained separately; however, the basket-type chamber offers greater possibilities of obtaining proper temperatures and meltage characteristics. Series of tests are discussed and conclusions drawn from the results. In the second part of the thesis, a method of …

Utilization Of Unwashed Low Grade Phosphate Rock., Stanley Goldsmith 1924-

Electronic Theses and Dissertations

No abstract provided.

Stress Analysis By Photoelastic Methods, Herald K. Palmer

Electronic Theses and Dissertations

The object of this article is to point out how the principles of photo elasticity may be used as a basis for the analysis of stresses in machine parts. It is also to review the methods and demonstrate the procedure for the determination of the characteristics and values of stresses in the models of the parts studied.

Plywood Adhesive Development., Edward J. Dowd

Electronic Theses and Dissertations

This thesis is primarily a study of two-step plywood adhesives made with varying amounts of phenol, 1, 3, 5 xylenol, resorcin, and formaldehyde. Each resin was evaluated by using it as the adhesive in making plywood. The plywood was then tested for shear strength and wood failure after a four hour boil.

Procedures are given for making and testing various straight phenolic resins and resins modified with 1, 3, 5 xylenol or resorcin, or comibinations of both of these accelerating resins.

The straight phenolic resins gave boil-proof bonds, but the curing cycle was too long. Those phenolics modified with 1, …

Accelerated Curing Of Superphosphate Fertilizer., Gus W. Leep

Electronic Theses and Dissertations

Simultaneous drying of curing superphospate is shown to be of definite value in increasing the available P2O5 content. Raw superphosphate heated to 80 degrees C., and analysed after 1 hour, 4 hours, 24 hours, and 48 hours of curing contained 16.92%, 19.67%, 20.66%, and 20.78% of available P2O5 respectively. For the same periods of time samples cured at room temperature contained 15.28%, 17.1%, 17.7%, and 18.82% of available P2O5. There was a larger amount of P2O5 available after 4 hours heating than after 48 hours at room temperature. This increase represented a 12:1 time-ratio in favor of the heated sample. …

Plywood Adhesive Development., Jesse R. Goza 1922-2013

Electronic Theses and Dissertations

No abstract provided.

Fiberboard From Wood Chips : Ii. Diffusion Of Water Through Glue Lines In White Oak Veneer : Iii. Factors Affecting Plate Efficiency Of Bubble Cap Distillation Columns., Dwight L. Mckay 1924-2012

Electronic Theses and Dissertations

No abstract provided.

High Temperature Coatings For Aircraft., Arthur Hoff Isaacs 1924-

Electronic Theses and Dissertations

No abstract provided.

Cigarette Resistant Finish : Ii. Glue Applicator Design : Iii. Preliminary Study Of Rubber-Phenol Co-Polymers, Glenn T. Martin 1922-1984

Electronic Theses and Dissertations

No abstract provided.

Semi-Micro Combustion And Solvent Extraction Of Natural And Synthetic Drying Oils, Part I., Man Mohan Moudgill

Electronic Theses and Dissertations

No abstract provided.

Froth Flotation Of Phosphate Rock., David L. Spitzer 1923-2012

Electronic Theses and Dissertations

No abstract provided.

Water And Water Vapor Barriers For Structural Plywood : Ii. Core Void Fillers For Structural Plywood., James Van Dyck Fear

Electronic Theses and Dissertations

This thesis presents the results of an investigation conducted to improve the weather resistance of plywood assemblies used in prefabricated housing manufacture. Specifically, this work involved water sealers for edge joints (called edge sealers), the prevention of surface transfer of water vapor through plywood (called vapor barriers), and fillers for structural defects in the wood (called core void fillers). Two edge sealers for plywood were developed that were considered successful in resisting water permeation. One was a quick drying paint formulated by the addition of 30 per cent leaded zinc oxide to 70 per cent Arco primer paint No. 156. …

High Temperature Coatings., Irvin Henry Lutz

Electronic Theses and Dissertations

This thesis is a report on coatings exclusive of the porcelain enamels which may be used at temperatures as high as 750*F., and also a description of the properties of the more heat resistant resins of commerce. The method of preparation and testing of the various coatings investigated in this research is given, and the results are tabulated and discussed. Best results were obtained with Dow Corning silicones of the 800 series heavily pigmented with either zinc dust or aluminum bronze, and with glycerol phthalate -- silicone coatings pigmented with aluminum bronze.

The Destearination Of Menhaden Fish Oil By Use Of A Votator And An Auxiliary Plate And Frame Filter Press., Douglass White 1920-2013

Electronic Theses and Dissertations

No abstract provided.

Solvent Extraction Of Fish Oil., Alan T. Thomas 1921-2001

Electronic Theses and Dissertations

No abstract provided.

A Substitute For Wood Veneer., Edwin R. Arbegust

Electronic Theses and Dissertations

This thesis is a report of an investigation for a substitute for wood veneer to be used as face material for wire-bound boxes. The fiberboard substitute was made using a heavy paper backing with a wood waste mixture of chips and sawdust with various types of adhesive binders. The following adhesives were used singly and in mixtures: Starch, sodium silicate, asphalt emulsion, animal glue, urea resin with a wheat flour extender, rosin, and casein. The composition and test results of the fiberboard panels made in the laboratory are reported.

A Correlation Of Plate Efficiencies In Fractionating Columns., Earl K. Stigger 1920-2007

Electronic Theses and Dissertations

No abstract provided.

Characteristics Of A Falling Film Distillation Column., Edward J. Kimmel 1920-

Electronic Theses and Dissertations

No abstract provided.

Graphical Analysis Of Certain Diffusion Problems., Wylie C. Kirkpatrick 1918-2008

Electronic Theses and Dissertations

No abstract provided.

Temperature Relationships In Tent Structures., Earl Robert Gerhard 1922-

Electronic Theses and Dissertations

No abstract provided.

Aircraft Finishes For Elevated Temperatures., Wilbur Louis Hayne 1922-

Electronic Theses and Dissertations

No abstract provided.

Removal Of Benzene-Insolubles From Coal Tar., John W. Mckenna 1924-2012

Electronic Theses and Dissertations

No abstract provided.

The First Approximate Conditions For The Formation Of Mesomorphous Coacervates., Stanley H. Jury 1916-1983

Electronic Theses and Dissertations

An analysis of the literature shows the close analogy between liquid crystalline phases in solution (fluids separating from main portion of solution and having some of the directional properties of crystals) and unipolar coacervates (solvated micelles of like charge separating as a distinct colloidal phase). A theory is here advanced that liquid crystalline phases in solution are the direct result of a maximum in osmotic pressure which is predictable from the first approximate equation of the Debye-Huckel theory in the same manner as unipolar coacervates were predicted by I. Langmuir. Application of the theory to aqueous soaps, investigated by Vold …

The Development Of An Ethocel Automobile Touch-Up Lacquer And A Suitable Sanding Surfacer : Ii. A Study Of The Physiological Effect Of Color Using The Munsell Color Notation., Thaddeus Andrew Peake 1919-1999

Electronic Theses and Dissertations

No abstract provided.

Heat Sealing Properties Of Ethyl Cellulose Modified Lacquers., William B. Moore 1924-2015

Electronic Theses and Dissertations

No abstract provided.

A Distillation Study : Ii. Factors Affecting Plate Efficiency : Iii. Properties Of Laminated Wood Glue Lines., Jack H. Nichols 1922-2007

Electronic Theses and Dissertations

No abstract provided.

Ethylcellulose Lacquer Coatings For Polystyrene Plastics., Stuart V. Heil

Electronic Theses and Dissertations

An ethylcellulose lacquer system for both decorative and protective purposes was developed for use on polystyrene plastics. It was found that a one-coat lacquer containing only alcohol solvents produced the most satisfactory finish. Formulations were based on experimental work, conducted to determine the effect of the various lacquer components on the plastic. The results of a study of formulations on a two-coat system are presented.