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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 13, Issue 6 - Dec 1975
Volume 13, Issue 5 - Oct 1975
Volume 13, Issue 4 - Aug 1975
Volume 13, Issue 3 - Jun 1975
Volume 13, Issue 2 - Apr 1975
Volume 13, Issue 1 - Feb 1975
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Controlled Release -Technique, Theory, and Application-
Ko, Young-Chan ; Moon, Sang-Heup ;
Korean Chemical Engineering Research, volume 13, issue 4, 1975, Pages 181~181
The primary intention of this paper is to present a broad introduction of controlled-release technology. Discussions are centered on techniques of formulation and release mechanisms of active ingradients. Aspects of practical application of this technology, together with some actual examples, are also provided.
The Intermix Flow Ratio of the Continuous Phase in a Rushton-type Extractor Agitated by Turbine Impellers with Flat and Screen Blades
Choi, Cheong-Song ; Kang, Woong-Ki ;
Korean Chemical Engineering Research, volume 13, issue 4, 1975, Pages 193~193
A theoretical study was carried out for a system of mixing cells in series with intermix flow between adjacent stages and the results were combined with experimental data obtained from an extractor. Intermix flow ratio was measured as a function of the impeller rotational speed, the flow rates of the continuous phase and the dispersed phase, and the screen opening. It may be concluded that the screen blade is more effective than the flat blade in an extractor.
Dimethyl Polysiloxane from Ferrosilicon
Moon, Tak-Jin ; Ahn, Tae-Oan ; Kim, Ki-Chul ;
Korean Chemical Engineering Research, volume 13, issue 4, 1975, Pages 203~203
Silicone oil of dimethyl polysiloxane was synthesized from 70% ferrosilicon. The steps were divided into the preparation of methyl chloride from the reaction of methyl alcohol and hydrogen chloride gas, the preparation of methyl chlorosilane by the reaction between methyl chloride and ferrosilicon using copper powder as a catalyst, the separation of methyl chlorosilane, and the hydrolysis and polymerization of methyl chlorosilane. Each step was discussed in detail in terms of the reaction conditions such as the effects of reaction temperature, reaction time, catalyst, and promotor on the synthesis processes. Finally, dimethyl polysiloxane oil of different viscosity range was obtained.
Hydrothermal Preparation of Zirconium Dioxide in a Continuous Reactor
Kim, Byeong-Jo ; Stambaugh, Edgel P. ;
Korean Chemical Engineering Research, volume 13, issue 4, 1975, Pages 211~211
A small continuous tubular reactor unit was constructed to study hydrothermal reactions. The unit was used in an experimental research program to study the kinetics of pressure precipitation of zirconium dioxide from aqueous solutions of zirconium tetrachloride. Experimental parameters investigated in the precipitation reaction included the temperature, the reactor residence time, and the feed composition. The significant findings of the study are related to the effect of reaction temperature on the overall rate of precipitation and the effect of feed composition on the precipitation process, which under certain reaction conditions was found to involve an initially slow induction period followed by rapid precipitation. Based on the experimental results, a preliminary design concept was developed for a production-scale unit for manufacturing zirconia having a narrow particle-size distribution.
Gas Hold-up of Several Aqueous Solutions in a Bubble Column (II)
Kim, Joo-Bong ; Sohn, Jin-Eon ; Kim, Sang-Yul ;
Korean Chemical Engineering Research, volume 13, issue 4, 1975, Pages 217~217
The effect of activity coefficient on gas hold-up of aqueous solutions of some inorganic electrolytes are studied at various concentration levels of the solution. From experimental data, correlations were derived relating the gas hold-up with the surface tension and activity coefficient of the solution in a bubble column.
A Review of Water/Oil Emulsion as Fuel
Yun, Chang-Gu ;
Korean Chemical Engineering Research, volume 13, issue 4, 1975, Pages 225~225
Microexplosion of water droplets suspended in fuel oil is known to improve heat transfer and reduce the formation of particulates and
. However, there exist many unsolved problems concerning the reliability of test results, the emulsion stability and the auxiliary equipment requirements. On other continents, the water/oil emulsion fuel has been tested for a number of years on various boilers, automobile engines and blast furnaces. Although claims of improved fuel economy abound, the prospect is not quite clear yet. In this review, we observe that only the colloid mills, homogenizers and ultrasonic reactors can economically emulsify the fuel oil, and propose that an effort to develop the technique in this country should give priority to collecting technical information and to well-controlled field tests with existing facilities.