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이동근,이대광 경상대학교 환경보전연구소 1995 環境保全硏究所報 Vol.3 No.1
Nonbiodegradable wastewaters were decomposed on Cu/Zn/Al₂O₃ catalyst system through catalytic oxidation. Most of phenol, chlorophenol and nitrophenol could be oxidized on this system, and the catalytic wet oxidation system could be a promising technique for the treatment of non-biodegrable wastewaters
Pd/C 촉매에 의한 2-(2-hydroxy-5-methyl-phenyl)-2H-benzotriazole 합성 반응의 특성
최주홍,이정원,이대광,이동근 慶尙大學校生産技術硏究所 1994 生産技術硏究所論文集 Vol.10 No.-
The reduction process using Pd catalyst is very attractive in the view points of the simple reaction step and the relatively less discharge of pollutants. The reduction characteristics of o-nitrohydroxyazobenzene(O-NHAB) with Pd/c catalyst was investigated in an autoclave and a reactor operated at atmospheric pressure. The reduction performance of O-NHBA in the auto clave showed high pressure gave good yield for tinuvin P. The maximum yield of tinuvin P based on o-nitroaniline was 63.3%. Some contents of water in the solution improved the reaction rate ad reduced the formation of impurities. Reaction temperature was able to be increased up to 75℃ with the relatively less impurities. The optimum content of NBA was about 10%.
Benzene의 감압증류시 응축기 용량과 회수율과의 경제성 연구
김태환,이경주,이대광,원성호,김남기 成均館大學校 科學技術硏究所 1995 論文集 Vol.46 No.1
In order to achieve economic solvent recovery, the recovery ratio was tested on the vacuum distillation of benzene as a solvent by changing the condenser capacity. The results obtained in this experiment were as follows; 1) As increasing the condenser capacity by 6.4 times from 35㎠ to 225㎠, solving recovery ratios were increased by 20%, 24%, and 31% at the bath temperature of 30℃, 40℃, and 50℃ respectively. 2) It was more effective for the solvent recovery ratio to use 10℃ coolant instead of 20℃ coolant, the differences of recovery ratios were about 28%∼32%. The differences of solvent recovery ratios used 0℃ coolant were about 33%∼44% and those used -10℃ coolant were 38.7%∼49%. 3) Bath temperature and solvent recovery ratio are closely related to the condenser capacity. In the case of small condenser capacity, the recovery ratio was increased at low bath temperature. On the other hand, in larger condenser capacity, the recovery ratio was increased at the high bath temperature. From the results of this study we found that the condenser capacity of 55㎡ was the optimal condition for the economic recovery of benzene.