Engineering Commons^™

Synthesis Of Trimethyl Borate By Ester Interchange, Hugh Murphy

Theses

Trimethyl borate was prepared by transesterification of a high—boiling methyl ester with a high—boiling trialkyl borate using a metal alcholate catalyst. Interchange occurred between n—amyl borate and the following methyl esters: dimethyl sulfate, parahydroxy methyl benzoate, methyl salicylate, and methyl stearate. Interchange also took place between methyl stearate and tribenzyl borate, tri—n—propyl borate, and tri—m, p—cresyl borate. Highest yields and purities resulted from reactions involving methyl stearate. Catalysts employed were magnesium—aluminum ethylate and aluminum Isopropoxide.

Two methods of separating the methanol—methyl borate azeotrope were evaluated: sulfuric acid extraction and salt splitting. Extraction with sulfuric acid was determined to be the …

A Study Of Continuous Photochemical Hydrolysis, Robert Parlante, Theodore Arthur Gropler

Theses

In this investigation, the ultraviolet absorption spectra and the batch photochemical hydrolysis of monochloroacetic and monobromoacetic acid, and their potassium and sodium salts, have been measured and compared with those existing in the literature.

The continuous photochemical hydrolysis of sodium chloroacetate has been investigated for the first time. The continuous photolysis of uranyl oxalate was investigated and used as a chemical actinometer.

Gaseous material in the reactant feed has been found to be important at low flow rates.

Carbon Tetrachloride-Xylene Equilibria, Michael Jay Ram

Theses

The liquid-liquid equilibria of the ternary systems carbon tetra-chloride-xylene-propylene glycol and carbon tetrachloride-xylene-diethylene glycol were investigated. The effectiveness of the glycols as selective solvents for xylene was represented by a plot of weight ratio xylene to carbon tetrachloride in each phase. It was found that the diethylene glycol was the better of the two solvents at concentrations resulting in more than 75% xylene in the xylene-carbon tetrachloride rich layer. At the lower xylene concentrations the propylene glycol was found more effective as a selective solvent.

Viscosity Of A Three Component System : Benzene-Ethanol-Acetic Acid At 20 Degrees C., 25 Degrees C., And 30 Degrees C, Alan Alvin Schetelich

Theses

The viscosity for the ternary system benzene-ethanol-acetic acid, has been determined. The viscosity maximum shown in the ethanol-acetic acid system is clearly distinguished in the ternary system as well. The viscosity minima which occur in the benzene-ethanol, and benzene-acetic acid systems are too slight to be readily apparent in the ternary system.

The ternary system viscosity was determined at temperatures of 20, 25, and 30° C. The effect of increasing the temperature from 20° C for the ternary system was to produce corresponding curves of lower viscosity. The maximum viscosity noted in the ternary system as well as the maximum …

Vapor Liquid Equilibria, Niranjan Prasad Shukla

Theses

A survey of the literature gave no reference to the n-Propanol Glycol system while the n-Propanol-Benzene system had been previously studied. Experimental data were found to agree closely with those existing in literature for the n-Propanol-Benzene binary system.

A ternary miscibility diagram at fixed temperature was found to give first-type of miscibility curve, i.e. n-Propanol was completely miscible in all proportions with Benzene and Ethylene Glycol, while Benzene and Ethylene Glycol were found to be partially miscible. The plait-point was determined by drawing tie-lines and using the Sherwood method as well as by the loga rithmic method of Hand. Both …

Equations Of State For Propyne, Thomas Marshall Stark

Theses

P-V-T data for propyne have been fit using the Martin-Hou and the Benedict-Webb-Rubin equations of state. The Martin-Hou equation, with its constants calculated from the critical properties and a vapor pressure point for the gas, fit up to 1.1 to 1.5 times the critical density with deviations of less than 1%. The Benedict-Webb-Rubin equation, with its constants calculated by the method of Joffe, resulted in greater deviations in the low pressure region than did the Martin-Hou equation; however, it also provided a better approximation of the data at high pressures and lower temperatures. The best over-all fit was obtained using …

Test 844: Ford 2000 Super Dexta Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 842: Ford 6000 (Gasoline), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 843: Ford 6000 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Whole-Field Methods In The Measurement Of Post-Elastic Surface Strains, Siew Poh Chan

Mechanical Engineering ETDs

Several whole-field methods were studied and a new technique was developed for the purpose of measuring post-elastic surface strains in metals. Critical evaluation was given to the following experimental techniques: the moire effect and the birefringent coating.

The Effects Of An Epoxy (Epocast 546) Upon The Tensile And Compressive Properties Of Portland Cement Concrete, Alvy C. Jackson

Civil Engineering ETDs

Although the behavioral pattern of plain concrete in compression is fairly consistent, its tensile properties leave much to be desired. The laboratory investigation described here was an attempt to increase the tensile property of plain concrete by adding an epoxy resin compound to the mixture. The investigation included tests for both compressive and tensile strengths of the mixtures that were considered. The compressive strength tests were included to determine what effect, if any, the attempt to increase the tensile property had on compressive strength.

Transient Response Of Linear Undamped And Lightly Damped Lumped Spring-Mass Systems By Graphica Techniques, Richard O. Brooks

Mechanical Engineering ETDs

Responsive motions of linear undamped and lightly damped lumped spring mass systems subjected to transient inputs can be determined by several methods. All these methods require solving of the differential equation in some manner. Practically all techniques for solving the differential equations involve higher mathematics.

Wave Propagation Past A Change In Cross-Section, Samuel A. Cone

Electrical and Computer Engineering ETDs

This thesis was undertaken to accomplish the following:

1) To experimentally determine the longitudinal strain distribution in the region of a change in cross-section of a cylindrical bar when a longitudinal wave passes this region.

2) To experimentally determine the longitudinal strain distribution in the incident, reflected and transmitted waves produced by a longitudinal wave in the region of a change in cross-section of a cylindrical bar.

3) To experimentally observe, at a distance of several bar diameters away from the change in cross section, the relation between the magnitudes of an incident longitudinal wave and the reflected and transmitted …

Fortran For The Maniac, Richard C. Lindberg

Electrical and Computer Engineering ETDs

It is not the intent of this thesis to present the rules of FORTRAN; it is assumed that the reader is generally familiar with the principles of FORTRAN programming. Rather, this is an attempt to describe FORTRAN in relation to the compiler program it actually is -- a machine language program which translates FORTRAN statements to machine language instructions, the latter capable of being executed by the same computer. The FORTRAN statements will be interpreted in terms of the compiler program which performs the translation, and algorithms for these statements will be described.

An Investigation Of Methods For Analyzing Networks Containing One Nonlinear Element, Dustin J. Wilson

Electrical and Computer Engineering ETDs

The inclusion of a single nonlinear element in a general N-loop network greatly complicates the resulting equations and prohibits a straightforward solution. The object of this investigation is to provide a method for solving such networks. In particular, a reduction of the network coefficient matrix will be considered in order to obtain one nonlinear equation and (N-1) linear equations. It will be shown that the form of the nonlinear equations is always the same, and a procedure for approximating the solution of equations of this type will be given.

Programming Manual For The Maniac Assembly Routine, Robert C. Ashley

Electrical and Computer Engineering ETDs

No abstract provided.

Test 841: Oliver 1600 (Gasoline), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

B-147-63, Computation Of Outflow From Breached Dams, June 1963, Defense Intelligence Agency, Production Center, Robert Bolin , Depositor

United States Department of Defense Military Intelligence

This guide contains detailed instructions for computing the outflow from breached dams supplemented by extensive tables and charts. The preface state that the document “contains intelligence which is not readily available through other media required for the accomplishment of the assigned mission of the Production Center and of interest to other agencies.

Interim Report On Rural Secondary, Base Stabilization Projects, Robert C. Deen, J. D. Shackelford

Kentucky Transportation Center Research Report

Early in 1962, the Division of Rural Highways selected several base stabilization projects for construction during the 1962 season. These projects were to involve the addition of 1-1/2 to 3 inches of compacted granular base to existing, rural secondary, traffic-bound macadam roads. Since these roads were not intended to be surfaced, calcium chloride and sodium chloride were to be added to the additional granular base material in an attempt to retain or "hold" the aggregate on the road. This treatment was in tended to improve the road and to build up the base over a period of a few years …

The Irish Plumber And Heating Contractor, June 1963 (Complete Issue)

Building Services Engineering

No abstract provided.

Transistorized Circuits For Telemetry, Dominick Misciascio Jr.

Physics & Astronomy ETDs

This thesis is concerned with the telemetry of small DC signals from photomultiplier tubes. The circuitry must have a high input impedance so as not to load down the photomultiplier tube and a low output impedance which is capable of controlling the current through a small incandescent bulb. This bulb is used to illuminate a photoresistor. The output of the circuit consists of a variation of the resistance of the photoresistor. This variable resistance is conventionally converted into a variable audio frequency which is transmitted to the receiving station on a radio-frequency carrier. The output resistance must be independent of …

The Investigation Of Frequency Response And Stability Of A Heat Exchanger Under Condensate Control, Louis F. Fornoff

Theses

Control of a condensing steam heat exchanger by condensate throttling was investigated theoretically by a frequency response analysis. The theoretical analysis was verified by experimental operation of the heat exchanger.

The system was characterized by heat transfer calculations and Laplace transform functions. The transfer functions were used to complete a frequency response analysis of the system which predicted the controller settings, the stability of the system and its response to a step set point change. The calculations were verified by experimental operation and reasonable agreement was obtained.

It was calculated that condensate throttling can be used to obtain stable control …

Prediction Of Ternary Azeotropes From Binary Data, Eric Lustig

Theses

The Margules equation as modified by Wohl for ternary liquid-vapor systems, is used to develop ternary activity coefficients at different concentrations and varying temperatures. Corresponding binary experimental data are necessary to mathematically obtain these ternary activity coefficients. A trial and error graphical technique is used to examine the ternary data for azeotropic conditions. Convergence on ternary graph paper can be easily detected after the first two trials. Divergence is an indication that the system under consideration is nonazeotropic.

Most of the azeotropic systems investigated agreed quite well with published data. The range of disagreement of concentrations for component a in …

Isobaric Vapor-Liquid Equilibria System : Benzene, Chlorobenzene, Phenol, Larry Madestau

Theses

Isobaric vapor-liquid equilibria were determined experimentally for the three binary systems benzene-chlorobenzene, benzene-phenol, and chlorobenzene-phenol; and for the corresponding ternary system benzene-chlorobenzene-phenol. Constants for the Chao modified Redlich-Kistler equations were calculated from the experimental data by the method of least squares. These constants were then used to predict vapor-liquid equilibria for the ternary system. The predicted values showed satisfactory agreement with those found experimentally.

A modified Ellis still was used for obtaining equilibrium data. Samples of vapor and liquid phases were analyzed by means of the F & M Model 720 vapor phase chromatograph. Benzene, chlorobenzene, and phenol used in …

Test 840: Oliver 1600 Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

A Unique Analog-To-Digital Voltage Conversion Network, Thomas O. Summers

Electrical and Computer Engineering ETDs

The increasing utilization of digital data acquisition systems has resulted in the design and development of a large number of different analog-to-digital voltage converters. Each of these designs exhibits varying specifications with regard to accuracy, speed, environmental tolerance, reliability, and cost.

These specifications are usually interrelated and the nature of the interrelations are, in turn, related to the design approach.

As an example of these interrelations, one could consider the specifications of a converter designed around an electro-optical approach requiring a cathode ray tube with coding mask. In this approach, the analog input voltage causes the deflection of a swept …

Studies In Modulation Of Interfacial Reactions For Certain Sulphide Minerals, Robert Owen Beyaert

Bachelors Theses and Reports, 1928 - 1970

No abstract provided.

Test 839: Oliver 1800, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Measurement Of Thin Film Thickness By The Crystal Resonance Method, David G. Adams

Electrical and Computer Engineering ETDs

Recent years have seen a tremendous increase in thin film activity. The electronics industry, in particular, has become increasingly active in the development and production of thin film components and complete micro-electronic circuits laid down as thin films. The principal methods of producing thin films are by chemical and electrolytic processes, and by evaporation and sputtering in vacuum. One of the problems associated with film deposition in vacuum involves the measurement of film thickness, a difficult task because: 1) the thicknesses encountered are typically measured in hundreds of angstroms; 2) the films are not physically flat; and 3) they do …

Characterization Of Synthetic Resins Used In Graphite Extrusion Process, Charles I. Fairchild

Chemical and Biological Engineering ETDs

Six furan resins and one epoxy resin were used in tests to determine coking values and gas evolution characteristics of the resins. The same resins, except the epoxy, were used as binders in extruded graphite rods to determine environmental factors affecting the coked density of the rods.

Coking values of the resins containing three different activators were determined by measuring residue remaining after heat treatment to 850° C. Coking values 54-56% were obtained with 8 phr to toluenesulfonic acid actiator.

Gas evolution curves were obtained by measurement of pressure rise in a constant volume apparatus during heating to 300° C …