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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Chemical Engineering Research
Journal Basic Information
Journal DOI :
The Korean Institute of Chemical Engineers
Editor in Chief :
Volume & Issues
Volume 4, Issue 3 - Dec 1966
Volume 4, Issue 2 - Aug 1966
Volume 4, Issue 1 - Apr 1966
Selecting the target year
The Activation of Acid Clay
Kim, Beung-Wook ; Chang, In-Yong ;
Korean Chemical Engineering Research, volume 4, issue 2, 1966, Pages 113~113
In order to determine the optimum temperature and time for the activation of acid clays, the specific area and preferential properties as index of the adsorbity were carefully studied. In this work the acid clays of Yong-Il were treated with 20 % sulfuric acid of 6 times in weight to the clay. Then the specific area of activated clay was measured by A. A. I. method, preferential properties by E. A. I. method, and the adsorbity was checked by S. E. A. I. method. The optimum activating temperature and time for this work were varied in range of
hours at boiling point depend on the raw materials used.
Salt Effect in Vapor-Liquid Equilibrium of Acetic Acid-Water System
Rhim, Chin-Nam ; Shon, Byung-Chung ;
Korean Chemical Engineering Research, volume 4, issue 2, 1966, Pages 117~117
Vapor-liquid equilibrium data at atmospheric pressure were obtained for the acetic acid-water system containing magnesium nitrate, cupric nitrate or cadmium nitrate of various concentrations. These data were obtained with a view to ascertaining the possibility of separating acetic acid and water under condition of reversed relative volatility by extractive distillation with increasing salt concentration. The results show a considerable effect of magnesium nitrate or cupric nitrate addition, with a reversal taking place at approximately 10 weight % magnesium nitrate, and 11 weight % cupric nitrate in the liquid phase. A method of graphical representation which is facilitated the interpolation of salt concentration is proposed, and the data is examined by the simple empirical equation which correlates the salt effect.
Reconsideration of Denbigh's Problem by Means of Discrete Maximum Principle
Namkoong, Shik ; Son, Byung-Jin ; Kwon, Young-Soo ;
Korean Chemical Engineering Research, volume 4, issue 2, 1966, Pages 121~121
The problem of an optimum temperature sequence in stirred tank reactors was proposed by Denbigh and then discussed from the dynamic programming point of view by Aris, is here reconsidered by means of the discrete maximum principle. The general method is given to deal with Denbigh's problems for any numerical examples by means of this principles. For the same numerical example as Aris', the solutions, not only for the case without the physical restrictions imposed on temperature and holding times, but also for the case with them, are given for single reactor, two reactor and three reactor system, compared with Aris' solutions. The solutions are solved analytically for single reactor and two reactor system. The comment on Aris' paper for the policies under the restrictions is given.
Concerning the Diffusion Kinetics of Combustion of Anthracite Coal
Hwangbo, H. ; Lee, Won-Kook ; Kim, Sang-Yul ;
Korean Chemical Engineering Research, volume 4, issue 2, 1966, Pages 129~129
A rate equation for the combustion of anthracite coal is derived, assuming that the diffusion entirely governs the kinetics of the process. Coal powder are pressed in a form of equidimensional cylinder at constant pressure. The rate is measured by means of thermal balance. The effects of combustion temperature and molding pressure on the rate constant are investigated.
On the Utilization of Carbonized Chaff as Catalyst Carrier
Namkoong, Shik ; Chun, Byung-Sun ;
Korean Chemical Engineering Research, volume 4, issue 2, 1966, Pages 135~135
These experiments were carried out to find the possibility of use of carbonized chaff as catalyst carrier for the vapour phase synthesis of vinyl acetate from acetylene and acetic acid, catalysed by zinc acetate. These carbonized chaffs treated with 0.1 N sodium hydroxide, 0.1 N hydrochloric acid, ether and warm water, and a commercial active carbon "Edo-Coal" were compared for their activity by the specific reaction rate, and under the conditions such as reaction temperature:
, particle size of catalytic carrier: 20-60 mesh, percentage of zinc acetate to catalytic carrier: 15%, it was found that the rate of the reaction of the carbonized chaff treated with ether is most preferable and the reactivity is observed to be about one third of "Edo-Coal".