Fast Breeder Reactor用 우라늄 농축에 관한 연구(Ⅰ) : 핵연료 출발물질 U_3O_8 분리 및 회수 Separation and Recovery of Uranium as Staring Matterial of Nuclear Fuel

김일두,정학진,박성규,송기동,정오진 조선대학교 기초과학연구소 1986 自然科學硏究 Vol.9 No.1

The strong anionic exchange resins with the Dowex-1 and Amberlite CC-400 form were transformed into resin of sulfate and phosphate acid form, respectively. The uranyl complex ions with SO^3_4 and PO^3_4 were adsorbed on the anion exchange resins mentioned above, and these complex ions were eluted as mixture eluents of 0.7M HNO_3-0.5M NH_4 NO_3 by anion exchange chromatography. All of the uranyl anion complex ions contained in effluent have been transformed nto the (NH_2)_2U_2O_7 and UO_2(NH_4) PiO_4. xH_2O as Precipitate type and then were ignited for one hours at 900^0C. The structures of all of the compounds obtained from precipitate and the weighing form have been identified by X-ray diffractometry and IR spectrophotometry. The analytical data for the amount of UO^2+_2- was discussed by spectropotometry in the range of 655nm. The optimum adsorption conditions of uranyl anion complex ions absorbed on the upper of the resin column were 0.8-1.2ml/mill of flow rates at pH1.5, and adsorptive power of uranyl complex ion of sulfuric acid type were nearly consistent with the Caussian normal distribution curve, whereas the elution state of UO_2(PO_4)^4-_2 with phosphoric acid type was departed. Therefore, the reaction kinetics of ion exchange resin of sulfuric type was faster than that of phosphoric type because of tile good dynamic equilibrium state and the stable affinity between UO_2(SO_4)^4-_3 and resin of sulfuric acid type. The weighting form obtained from resin of sulfuric acid and phosphoric acid type was U_3O_8 and U_2O_3P_2O_7, whose recovery was 92.9% and 87.9%, respectively. The possibility of recovering uranium from the monazite sulfate solution using strong base anion resin, Amberlite CG-400, (sulfate form), was successfully recovered more than 90%. And than phosphate ion did not seem to interfere with the process.

N, N-Dimethylformamide-물 혼합용매중에서 Tetramethylammonium Chloride의 분몰랄부피

김일두,윤석진,정석진 朝鮮大學校 自然科學硏究所 1982 自然科學硏究 Vol.5 No.-

The apparent molal volumes of a series of homologous tetraalkylammonium chlorides, Me_(4)NCl, Pr_(4)NCl and Bu_(4)NCl in a series of aqueous and Me_(4)NCl of N, N-Dimethyiformamide(DMF)-water mixtures were determined from precision density measurements at 30±0.5℃. The partial molal volumes of the salts have been determined by extrapolation to dilute the apparent molal volumes infinitely. Thc results are as follows: 1) The limiting slope S_(v)' of Me_(4)NCl is positive, while S_(v)', of Et_(4)NC1, Pr_(4)NC1 and Bu_(4)NC1 grow larger gradually with increasing of various size of tetraalkylammonium cation inpure water. 2) The maximum liminng slope of Me_(4)NCl in DMF-water mixtures is observed at 0.4-0.5 mole fraction of DMF. 3) The minimum paruial molal volume of Me_(4)NCl in DMF-water mixtures is found at 0.5 mole fraction of DMF by electrostriction effect of chloride ion. All these behaviors seem to be closely correlated with the interaccions between solute-solvent and solvent-solvent or various size of the ion species.

混合觸媒를 利用한 Anthracite Flue Gas로 부터 Carbon Monoxide의 除去

金一斗 조선대학교 생산기술연구소 1979 生産技術硏究 Vol.1979 No.-

It was investigated that the oxidation of carbon monoxide from anthracite flue gas by using mixed catalysts. On the condition of adequate air supply, complete removal of carbon monoxide above 650℃. Using mixed catalysts consisting of MnO₂, Cr_(2)O_(3), and Fe_(2)O_(3), the oxidation of carbon monoxide occurred at the effective reaction temperature as follows; on 33% MnO₂33% Cr_(2)O_(3)-33% Fe_(2)O_(3) at 260℃, on 30% MnO₂-30% Cr_(2)O_(3)-40% Fe_(2)O_(3) at 250℃, on 70% MnO₂-10% Cr_(2)O_(3)-20% Fe_(2)O_(3) at 240℃, on 70% MnO₂-20% Cr_(2)O_(3)-10% Fe_(2)O_(3) at 245℃, on 50% MnO₂-30% Cr_(2)O_(3)-20%Fe_(2)O_(3) at 175℃, and on 50% MnO₂-20% CrzOz-30% Fe_(2)O_(3) at l60℃ A catalyst consisting of 50% MnO₂-20% Cr_(2)O_(3) -30% Fe_(2)O_(3) had the highest activity of all the MnO₂-Cr_(2)O_(3)-Fe_(2)O_(3) mixture. Volumetric flow rate gases in the catalytic reactor, in the range of 1OOOcc/min to 19OOcc/min., gave no effct on carbon monoxide removal efficiency. Over the range of effective reaction temperature, carbon monoxide removal efficiency decreased linearly with increasing inlet carbon monoxide concentration while temperature was fixed.

디페닐, 디페닐케톤과 요오드 사이의 전하 전이 착물

김일두,노봉오,정석진 조선대학교 기초과학연구소 1982 自然科學硏究 Vol.4 No.2

Charge transfer complexes of diphenyl and diphenylktone with iodine in carbon tetrachloride have been carried out by Ultraviolet-Visible spectrophotometric. The stability constants, the molar extinction coefficients and the thermodymic constants of these complexes have been determined at various temperatures. The results are as follows: 1) The electronic transitions of these complexes have maximum of absorption at 282nm and the formation of one to one molecular complexes. 2) The molar extinction coefficients of these complexes are more than ten thousands. 3) The maximum of absorption moves to high energy as the concentration of the donor increases. 4) It is observed that the stability constants are relatively large and the negative entropies are very small.

亂溶性 水銀鹽의 熱的 性質과 選擇性 膜電極의 特性

金一斗,丁梧鎭,소현희 조선대학교 기초과학연구소 1983 自然科學硏究 Vol.6 No.1

Insoluble Hg-Salts synthesized by method of co-precipitation according to the various reaction time and temperature were identified by using X-ray diffractometer and these thermal properties were checked by thermal analytical method. The responsive characteristics of the selective membrane electrodes which were made in order to determination of responsive potential in test solution were investicated by Digital Votmeter especially designed. The selective membrane electrodes were used as an indicating electrodes in the potentiometric titration of single atoms and mixing cations. The results are as follows: 1) The response potentials of the selective membrane electrodes were proportional to the activities of iodide, cyanide ion, d=orbital transitional elements in the concentration range of 10^-1-10^-7 M in the case coated with 1.0% P.V.C., but not to the ions of typical elements. 2) The Nernstian slope for ions of the transitional elements determined by exchange reaction and electrode reaction between chemical species and the selective membrane electrodes in the electrolytes were decreased in order of Hg^2+, Fe^2+, Ni^2+, Ni^2+ and Cu^2+.

Oen Nen H_4 거대고리 리간드를 가지는 이온교환수지 합성과 UO^2+_2의 분리특성

김일두,김호두 조선대학교 기초과학연구소 1987 自然科學硏究 Vol.10 No.1

The Oen Nen-H_4, macrocyclic ligand with the donor sets which the complex of UO^2+_2 could stably be formed has been synthesized from salycilaldehyde, 1.2-dibromoethane and diaminoethane. The resin separating UO^2+_2 selective1y has been synthesized by copolmerizating the chromethylated styrene-DVB and Oen Nen-H. The adsorptive characteristics and behavior of elution of the uranium (Ⅳ) metal for the resin mentioned above were discussed in various experimental conditions. The styrene-DVB copolymer with Oen Nen-H group was stable at high temperature (350℃) and in the strong acid and base, and showed the structural stability for a long use. The optimum condition of selective adsoption of uranyl (Ⅱ) nitrate solution for the resin with Oen-H_4 group was pH4. O-10.5.In dilute sample solution, UO^2+_2 was adsorbed well by the resin of copolymer with 1% cross linkage of Oen Nen-H type, but adsorptivity of UO^2+_2 was decreased in the resin of copolymer with crosslinking more than 4%.

공급자의 입장에서 본 중소기업의 사무자동화ㆍ전산화

김일두 전남대학교기업경영연구소 1994 經營情報 Vol.5 No.1

N,N-Dimethylformamide-물 혼합용매중에서 Tetramethylammonium Chloride의 분몰랄부피

김일두,윤석진,정석진 조선대학교 기초과학연구소 1982 自然科學硏究 Vol.4 No.2

The apparent molal volumes of a series of homologous tetraakylammonium chlorides, Me_4NCl, Pr_4NCl and Bu_4NCl in a series of aqueous and Me_4NCl of N, N-Dimenthylformamide (DMF)-water mixtures were determined from precision density measurements at 30±0.5℃. The partial molal volumes of the salts have been determined by extrapolation to dilute the apparent molal volumes infinitely. The results are as follows: 1) The limiting slope S_υ´ of Me_4NCl is positive, while S_υ´, of Et_4NCl, Pr_4NCl and Bu_4NCl grow larger gradually with increasing of various size of tetraalkylammonium cation inpure water. 2) The maximum limiting slope of Me_4NCl in DMF-water mixtures is observed at 0.4-0.5 mole fraction of DMF. 3) The minimum partial molal volume of Me_4NCl in DMF-water mixtures is found at 0.5 mole fraction of DMF by eletrostriction effect of chloride ion. All these behaviors seem to be closely correlated with interactions between solute-solvent and solvent-solvent or various size of the ion species.

포름산-물, 아세톤-물, 및 에탄올-물 혼합용매 중에서 철족 염화물의 거동에 관한 연구 : Formic Acid-Water, Aceton-Water and Ethanol-Water

김일두,최칠남,정오진 조선대학교 기초과학연구소 1980 自然科學硏究 Vol.3 No.1

The electric conductances of iron, cobalt and nickel chloride in a series of some mixed solvent, formic acid-water, acetone-water and ethanol-water, have been measured at 30℃, respectively. The limiting equivalent cnductances of the salts have been computed by Debye-Hukel-Onsager, and various limiting equivalent conductances with the compositions in each of mixed solvents. have been explained in terms of selective solvation of electrolytes. The limiting ionic conductances of Fe^+2, Co^+2 and Ni^+2 are in order of Ni^+2<Co^+2<Fe^+2 which is the reversed order of solution for the ions in dilute solution. 2) The values of FeCl_2, CoCl_2 and NiCl_2(0,0∼0.3 mole fraction) in acetone-water mixed solvent are in order of NiCl_2<CoCl_2<FeCl_2 but in order of NiCl_2<FeCl_2 <CoCl_2 in more than 0.4 mole fraction. 3) For thes state of dilute solution, the chlorides of Fe-group is selectively solvated water rather than acetone and ethanol. 4) According to the increase of the mole fraction of acetone in mixed solvent, Walden products (A。??。values) of electrolytes are decreased. 5) Limiting equivalent conductances of 10^-2-10^-4 mole 1^-1-FeCl_2, CoCl_2 and NiCl_2 that are analyzed in ethanol-water and acetone- water mixed solvent at 30℃, is agree with calculated values by Debye-Hukel-Onsager equation. 6) The conductances of dilute solution of FeCl_2 and NiCl_2 in formic acid-water mixed solvent could not be analyzed because of strong ionic atmosphre of solvent itself.

디페닐, 디페닐케톤과 요오드 사이의 전하 전이 착물

김일두,노봉오,정석진 朝鮮大學校 自然科學硏究所 1982 自然科學硏究 Vol.5 No.-

Charge transfer complexes of diphenyl and diphenylktone with iodine in carbon tetrachloride have been carried out by Ultraviolet-Visible spectrophotometric. The stabilky constants, the molar extinction coefficients and the thermodymic constants of these complexes have been determined at various temperatures. The results are as follows: 1) The electronic transitions of these complexes have maximum of absorption at 282nm and the formation of one to one molecular complexes. 2) The molar extinctions coefficients of these complexes are more than ten thousands. 3) The molar of absurprtion moves to high energy as the concentration of the donor incrcases. 4) It is observed thar the stability constants are relatively large and the negative entropies are very small.