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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 18, Issue 6 - Dec 1980
Volume 18, Issue 5 - Oct 1980
Volume 18, Issue 4 - Aug 1980
Volume 18, Issue 3 - Jun 1980
Volume 18, Issue 2 - Apr 1980
Volume 18, Issue 1 - Feb 1980
Selecting the target year
The Complex Formation Reactions of Rare Earth Elements
Yun, Sock-Sung ; Yoon, Suk-Ho ;
Korean Chemical Engineering Research, volume 18, issue 6, 1980, Pages 439~439
To elucidate detailed mechanisms of lanthanide complex formation reactions and the structural features of the solvated plus-three cations, the kinetic studies of the complex formation reactions of lanthanide elements have been carried out for the past couple decades. The mechanisms proposed for the reactions in the literature are discussed.
Gas-Phase Oxidation of Propylene to Acetone on Palladium Chloride-Active Charcoal
Nahm, Kee-Suk ; Lee, Wha-Young ; Choe, Chang-Gyun ;
Korean Chemical Engineering Research, volume 18, issue 6, 1980, Pages 451~451
With palladium chloride supported on active charcoal, catalytic oxidation of propylene to acetone in the vapor phase was studied both theoretically and experimentally. Using a conventional tubular flow reactor, the conversion of propylene as well as the selectivity to the acetone was investigated under various reaction conditions. The reaction rate increased markedly with rise in steam concentration but decreased with rise in temperature. The reaction mechanism was discussed in details and was partly confirmed by the experiment.
Catalysis by Ion Exchange Resin -Esterification of Phenol and Acetic Acid-
Suh, Sung-Sup ; Ihm, Son-Ki ;
Korean Chemical Engineering Research, volume 18, issue 6, 1980, Pages 461~461
The liquid phase esterification of phenol and acetic acid was performed in a batch reactor using two types of macroreticular ion exchange resin catalysts, i.e., Amberlyst XN-1010 and Amberlyst 15. Consistent with previous studies, the replacement
and the addition of water reduced the reaction rates. Experimental data on the initial reaction rate with negligible mass transport resistance in the macropere were analyzed by introducing possible system parameters, from which the effects of distribution coefficient, permeability inside the microsphere and intrinsic reacton mechanism on the reaction system are discussed. The effect of temperature on the reaction rate was explained by the different rate of increase in the gel permeability for each resin, and the activation energy could be estimated.
A Study on the Control of Particle Size for Organic Material
Gang, Jeong-Bu ; Gu, Bon-Tak ; Lee, Sang-Guk ; Lee, Gyeong-Hui ; O, Dong-Yeong ;
Korean Chemical Engineering Research, volume 18, issue 6, 1980, Pages 469~469
In order to contol the particle size of synthetic organic material soluble in ketone analogs, a continous crystallization method was developed which gave a narrow distribution of desired particle sizes by varying the solvent ratio and the agitation speed with special application to high energetic opganic materials.
A Study on Recycling Process of Polyester Waste
Kang, Sung-Ju ; Kweon, Soo-Young ; Lee, Sun-Hyun ; Lee, Won-Kyoo ;
Korean Chemical Engineering Research, volume 18, issue 6, 1980, Pages 479~479
Recycling of PET waste was studied by employing depolymerization to a lower molecular -weight monomer or oligomer（BHET） in a continuous two stage alcoholysis process. A dissolver of $3.4\ell$/TEX> capacity was used for dissolving PET waste in BHET at
, a preheater for heating EG, and a $2.75\ell$/TEX> tubular reactor, equipped with a perforated plate for good mixing, for depolymerization reaction of dissolved PET waste in BHET with EG. The effect of reaction temperature, residence time, and recycle ratio on the average degree of polymerization of depolymerized oligomer were experimentally investigated. It was found that the optimum conditions were as follows : reaction temperature of
, residence time of 10 min, and recycle ratio of 2 : 1. Under the optimum operating conditions the average degree of polymerization of depolymerized oligomer ranged from 1.5 to 1, 7 which appears low enough to be used in repolymerizing to PET.
Coal Pretreatment and Gasification in a Fluidized Bed
Lee, Hee-Woo ; Kim, Jong-Won ; Kim, Sang-Done ; Lee, Won-Kook ;
Korean Chemical Engineering Research, volume 18, issue 6, 1980, Pages 489~489
Coal pretreatment and gasification are studied in a 3 inch diameter fluidized bed at atmospheric pressure. Bituminous rank coal, which appeares by heating coal up to plastic range (
), has a caking characteristic which has to be removed for use in fluidized bed reactors. In order to find optimum conditions of pretreatment, i.e., minimum weight loss or volatile matter and minimum caking property, operating conditions such as temperature (
), residence time (
), and oxygen to coal ratio (0.08, 0.16, 0.24) have been varied. Caking propery is determined by Free Swelling Index method. The optimum operating conditions have been found from the pretreatment experiments such that the oxygen to coal ratio is 0.08 and residence time is 10 minutes at temperature of
. Weight loss of coal by the pretreatment is 19 percent of its inherent volatile matter contents. The ratio of carbon monoxide to carbon dioxide and the sum of carbon monoxide and hydrogen produced by coal gasification increase with bed temperature.
On Reaction Between Uranyl Sulfate and Hydrogen
Ham, Yong-Mook ; Shin, Byung-Sik ;
Korean Chemical Engineering Research, volume 18, issue 6, 1980, Pages 495~495
The kinetics and the process of the reaction between uranyl sulfate and hydrogen have been studied isothermally in range of
and 0.4 to 1.0 atm in hydrogen partial pressure. The reaction is represented as follows ;
The reaction was first order with respect to solid product and hydrogen partial pressure, respectively. The value of the activation energy was found to be 26.6 Kcal/mole.
A Process Optimization Technique by Statistical Multivariate Response Surface Analysis and Its Computerization
Park, Sung-Hyun ;
Korean Chemical Engineering Research, volume 18, issue 6, 1980, Pages 503~503
In most chemical processes, there are more than two responses of interest, and we want to know the optimal levels of the factors(i.e., pressure, temperature, etc.) that influence the responses. This paper is to propose how to fit the multivivate response surfaces for a given set of data, and to propose how to analyse the data to obtain an optimal operating condition for the factors. To implement the proposed method in practice, a FORTRAN computer program was written and explained in this paper, lastly, an industrial example is illustrated to explain the proposed technique.
The Distribution and Adsorption Properties of Natural Zeolites and Silicates Obtained from Eastern Coastal Area
Kim, Jong-Taik ; Sohn, Jong-Rack ; Seo, Eun-Deock ; Kim, Ho-Sik ;
Korean Chemical Engineering Research, volume 18, issue 6, 1980, Pages 513~513
Energy of Tomorrow-Hydrogen-(II)
Yun, Kyung-Suk ;
Korean Chemical Engineering Research, volume 18, issue 6, 1980, Pages 519~519