Document Type
Thesis
Date of Award
6-30-1961
Degree Name
Master of Science in Chemical Engineering - (M.S.)
Department
Chemical Engineering
First Advisor
George C. Keeffe
Second Advisor
C. L. Mantell
Third Advisor
Joseph Joffe
Abstract
The purpose of this investigation was to extend the data and to improve the procedures of previous investigators (1), (2), and (3), in the study of diffusion coefficients in aqueous media.
The main contribution of this investigation is the elimination of the tedious work of size grading, drying, weighing, and rehumidification of the Dowex 50 W - X8 resin, which is used to determine the ion exchange rates for the cations under consideration, The simplified procedure measures the resin volume by displacing a known volume of water. The method of calculating diffusion coefficients follows the procedure of (1), (2), (3), and Reichenberg (4).
The influence of free acid content of resin in the cation exchange method has been examined critically, and it has been determined that the influence is negligible at the 0.005 normal cation concentration range. At lower concentration ranges, the free acid content of the resin must be considered in the calculations.
This investigation presents, for the first time, the determination of the diffusion coefficient of a large molecule, crystal violet, by using a cation exchange resin. Two values were obtained on two separately purified dye samples. The values, obtained, 0.473(10-5) and 0.775(10-5) cm.2/sec., are of the proper order of magnitude when compared to the diffusion coefficient of 0.755(10-5)cm.2/sec. as determined by Mouquin and Cathcart (5).
Recommended Citation
Lanyon, Robert Peter, "A simplified procedure for diffusion coefficients from cation exchange studies" (1961). Theses. 3174.
https://digitalcommons.njit.edu/theses/3174
