http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Development of Chemical Accident Classification Codes and Tool for Management in Process Industries
Jang, Namjin,Han, Kyusang,Koo, Jamin,Yoon, Yi,Yong, Jongwon,Yoon, En Sup The Society of Chemical Engineers, Japan 2009 Journal of chemical engineering of Japan Vol.42 No.10
<P>In this study, domestic and international chemical accident databases are analyzed, and a chemical accident reporting system is developed using chemical accident classification codes. These codes are revised by adopting the data collected in 2115 cases of chemical accidents that occurred in S. Korea over the last 20 years. The revised classification codes are composed of 12 upper, 64 middle, and 276 lower classes. The developed database is composed of data input, data list, and data search modules as well as statistic and analysis modules. Module operations help obtain information on relationships between accident data attributes that are not apparent, in addition to simple statistical results. The chemical accident tracking system is available on the Internet, and the data are treated using an on-line analytical system. The records are statistically analyzed to identify type of accidents that occurs frequently in Korean chemical companies, as well as the accident data and materials involved. We expect the results of this study to be useful in reporting for developing a management of system for prevention of chemical accidents, and improve the manageability of the designed system.</P>
Synthesis and Characterization of Dendritic Pt Nanoparticles by Using Cationic Surfactant
Kani, Kenya,Zakaria, Mohamed B.,Lin, Jianjian,Alshehri, Abdulmohsen Ali,Kim, Jeonghun,Bando, Yoshio,You, Jungmok,Hossain, Md Shahriar A.,Bo, Jiang,Yamauchi, Yusuke Chemical Society of Japan 2018 Bulletin of the Chemical Society of Japan Vol. No.
Understanding Clusters toward the Design of Functional Molecules and Nanomaterials
Singh, N. Jiten,Lee, Eun Cheol,Choi, Young Cheol,Lee, Han Myoung,Kim, Kwang S. Chemical Society of Japan 2007 Bulletin of the Chemical Society of Japan Vol.80 No.8
<P>In this account, we highlight the theoretical investigations of various cluster systems comprising of water clusters, π-containing clusters, and metallic clusters. We illustrate how these investigations help us understand and design structures and properties of nanowires, novel functional ionophores/receptors, and nanomaterials. Many of these theoretically predicted systems have been experimentally realized and some of the predicted structures/properties are left for the future which of course could be promising challenges for experimentalists.</P>
Chemical Recycling of Poly(Ethylene Terephthalate) Using a New Hybrid Process
Kim, Bo-kyung,Kim, Dongpil,Cho, Youngmin,Han, Myungwan The Society of Chemical Engineers, Japan 2008 Journal of chemical engineering of Japan Vol.41 No.9
<P>In this study, we propose a new hybrid process consisting of glycolysis/methanolysis and then a vapor methanolysis process to obtain dimethyl terephthalate (DMT) and ethylene glycol (EG) in the depolymerization of waste poly(ethylene terephthalate) (PET). Zinc acetate was used to catalyze the reactions. We found that the depolymerization rate increased remarkably when glycolysis and methanolysis reactions were simultaneously carried out than when the glycolysis reaction was performed alone. We explored the possibility of the hybrid process and examined optimal weighting between glycolysis and methanolysis in the glycolysis/methanolysis step to increase the DMT yield and production rate. We also investigated the effect of major process variables such as reaction pressure, reaction temperature, reaction time, amount of EG, and methanol feed rate on process performance. We found that methanolysis has a greater role than glycolysis in the glycolysis/methanolysis step and the DMT yield has a maximum at a reaction temperature of 513.15 K and EG/PET mole ratio of 0.52, and increases with reaction pressure.</P>
Liang, Hui,Na, Young Mee,Chun, In Sung,Kwon, Soon Sik,Lee, Young-A,Jung, Ok-Sang Chemical Society of Japan 2007 Bulletin of the Chemical Society of Japan Vol.80 No.5
<P>Dinuclear 1,2-semiquinonato/catecholatocobalt complexes containing 1,1,4,7,10,10-hexamethyltriethylenetetramine (hmdeta) as a potential tetradentate N<SUB>4</SUB> coligand, [Co<SUB>2</SUB>(hmteta)(dbbq)<SUB>4</SUB>], (dbbq = 3,5- and 3,6-di-<I>tert</I>-butyl-1,2-benzoquinone (3,5-dbbq and 3,6-dbbq)) were synthesized and characterized. The crystal structures proved that [Co<SUB>2</SUB>(hmteta)(3,6-dbbq)<SUB>4</SUB>]·2C<SUB>6</SUB>H<SUB>5</SUB>CH<SUB>3</SUB> ([3,6]) exists as low spin [(3,6-dbsq)(3,6-dbcat)Co<SUP>III</SUP>(hmteta)Co<SUP>III</SUP>(3,6-dbsq)(3,6-dbcat)] (3,6-dbsq = 3,6-di-<I>tert</I>-butyl-1,2-semiquinonato; 3,6-dbcat = 3,6-di-<I>tert</I>-butylcatecholato), while [Co<SUB>2</SUB>(hmteta)(3,5-dbbq)<SUB>4</SUB>]·C<SUB>6</SUB>H<SUB>5</SUB>CH<SUB>3</SUB> ([3,5]) approximates to [(3,5-dbsq)<SUB>2</SUB>Co<SUP>II</SUP>(hmteta)Co<SUP>II</SUP>(3,5-dbsq)<SUB>2</SUB>] in the solid state at ambient temperature. On the basis of the effective magnetic moments, the [Co<SUP>III</SUP>] → [Co<SUP>II</SUP>] conversion of [3,6] underwent a relatively abrupt transition around 330 K while that of [3,5] occurs in a wide range of temperature. Electronic absorption spectra showed that [3,6] shifts predominantly to [Co<SUP>III</SUP>] whereas [3,5] shifts to [Co<SUP>II</SUP>] valence tautomer in solution at room temperature. The charge distribution of [3,6] exhibited significant solvent effects at room temperature. These prominent features between [3,5] and [3,6] appeared to be associated with difference between delicate electronic and steric effects of the two dbbq ligands.</P>
X-ray Direct Observation of Reactions and Labile Species on the Basis of Crystal Design
Chemical Society of Japan 2014 Bulletin of the Chemical Society of Japan Vol. No.
This account reviews recent development of in situ crystallographic study of reactive intermediates using the cryo-trapping method. Starting from the basic concept of a reaction cavity in a crystal, we succeeded in not only observing photoinduced reactive species such as radical, carbene, and nitrene but also establishing a unique approach, crystalline molecular flask, to observe labile species in chemical reactions in a crystal. On the basis of such a crystalline reaction field design, we successfully observed irreversible reactive intermediates in a crystal.