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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 10, Issue 6 - Dec 1972
Volume 10, Issue 5 - Oct 1972
Volume 10, Issue 4 - Aug 1972
Volume 10, Issue 3 - Jun 1972
Volume 10, Issue 2 - Apr 1972
Volume 10, Issue 1 - Feb 1972
Selecting the target year
Polyaromatic Heterocylics -Heterocyclic Ring을 포함하는 Polyaromatics-
Hong, Seok-Ju ;
Korean Chemical Engineering Research, volume 10, issue 1, 1972, Pages 2~2
A Studies on Magnesium Ammonium Phosphate Fertilizer from Dolomite
Kim, Chang-Eun ;
Korean Chemical Engineering Research, volume 10, issue 1, 1972, Pages 7~7
This investigation was carried out to produce a high quality magnesium compounded fertilizer by initially dissolving calcined dolomite in sea water to form the intermediate
precipitate, and reacting this intermediate with phosphoric acid and ammonia thereafter. The experimental results were obtained as follows ; 1) The optimum calcination temperature of dolomite was about
for 30 minutes operation and in the displacement of the calcined dolomite in sea water, the optimum mole ratio of calcium hydroxide to magnesium chloride is 1 : 1.2 for 4 hours of the dissolution time. 2) The high yield of the magnesium compounded fertilizer was obtained, when the precipitate was reacted with 20% phosphoric acid and neutralized with 28% ammonium hydroxide thereby obtaining the alkalinity of the solution to pH 9. 3) By the results of X-ray diffraction and chemical analysis, the major component of the product was magnesium ammonium phosphate at the above condition and the fertilizing effect was also good.
Liquid-phase Catalytic Oxidation Mechanism and Kinetics of Propylene to Propylene Oxide by Cumene Hydroperoxide
Lee, Wha-Young ; Lee, Chai-Sung ;
Korean Chemical Engineering Research, volume 10, issue 1, 1972, Pages 13~13
Propylene of C. P. Grade dissolved in t-butanol was catalytically oxidized to propylene epoxide using cumene hydroperoxide, which was prepared by contacting cumene with oxygen. The catalysts used were molybdenum, manganese, cobalt, and copper compounds. The work of searching the optimal reaction conditions, reaction mechanisms, and its kinetics were attempted by conducting several series of experiments. It was confirmed in this work that, among catalysts used, the molybdenum catalyst was the only effective one for the selective formation of propylene oxide, and the effective concentration of the catalyst was limited to only a small value ; the higher the concentration of molybdenum in reacting solution, the less the portion of cumene hydroperoxide was used for converting propylene into propylene oxide, or the lower the selectivity for forming propylene oxide. The selectivity attained in this work was more than 98% at reaction temperatures ranging from
when the initial relative concentrations of cumene hydroperoxide, t-butanol, and propylene in liquid phase were 1, 4, and 16 moles per liter and the molybdenyl naphthanate, less than
mole per mole of cumene hydroperoxide, was mixed into reactants. The rate of formation of propylene oxide is
The rate increased about twice by the raise of
in reaction temperature. The activation energy calculated from the Arrhenius plot is 18.8 Kcal/mole.
Oxidation by Zeolite-Y Containing Cations of Transition Metals -Oxidation of Carbon Monoxide-
Lee, Doo-Kyum ; Ha, Baik-Hyon ; Hahn, Nam-Sook ;
Korean Chemical Engineering Research, volume 10, issue 1, 1972, Pages 27~27
Zeolites Y ion-exchanged with cation of transition metals were tested for oxidation reaction. For the oxidation of carbon monoxide by Zeolite Co(II)Y, Fe(II)Y, Ni(II)Y, Cr(III)Y and Mn(II)Y, rate equations obtained are as follows.
Mechanism of Twigg-Redeal type which carbon monoxide adsorbe chemically and oxygen arrive on the surface as gas phase was also proposed. Activation energies of the above transition metal Zeolites were measured at the temperature range of
to discuss the mechanism.
Catalytic Desulfurization from Hydrocarbons in the Vapor Phase by Alkali-Ferrite
Chun, Yung-Yun ;
Korean Chemical Engineering Research, volume 10, issue 1, 1972, Pages 33~33
A simplified procedure is proposed for the desulfurization by means of the catalytic reaction of alkali-ferrite. The vapor of gas oil shall be passed over the catalyst containing alkali-ferrite supported on an inert carrier such as aluminium oxide. The alkali in the ferrite is potassium oxide or sodium oxide. The reaction temperature of catalyst shall be modified between
, and the pressure atmospheric, and the feed rate of gas oil is 50 ml/hr. The sulfur content of the feed gas oil is 1.09%. As the result, the efficiency of desulfurization has been about 60%, and the best conditions for catalytic desulfurization were as follow : 1) Alkali in the catalyst............................potassium oxide. 2) Ratio of alkali oxide to ferric oxide............................1/1 (molar). 3) Ratio of alkali-ferrite to alumina ............................1/1 (weight). 4) Temperature of catalyst in the reactor ............................
at atmospheric pressure.