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특허정보(特許情報)를 이용한 희소백금족(稀少白金族) 특성(特性)과 회수기술(回收技術)
안종관,이강명,이재령,Ahn, Jong-Gwan,Lee, Kang-Myoung,Lee, Jae-Ryeong 한국자원리싸이클링학회 2009 資源 리싸이클링 Vol.18 No.4
지각 내 존재비율이 0.4 ppb 이하인 희소백금족 로듐, 루테늄, 이리듐, 오스뮴 원소에 대해 특성을 조사하고 일본을 중심으로 한 기술선진국의 특허 등록된 회수 및 분리기술을 정리함으로써 국내 발생 폐자원으로부터 희소백금족 회수기술과 원료소재화 활용기술 개발 필요성을 제시하고자 한다. Rare platinum group (RPG)including rhodium, ruthenium, iridium, osmium, exists at the rate of 0.4 ppb or less in the earth's crust. For the purpose of suggestion to developing necessity for recycling technology with the RPG, survey on the characteristics and the recovery technologies was carried out by using patent information.
폴리우루시올을 함유한 도료의 실내공기 및 아토피피부염에 대한 영향
김재홍 ( Jae Hong Kim ),이강명 ( Kang Myoung Lee ),고상백 ( Sang Baek Koh ),김상하 ( Sang Ha Kim ),최응호 ( Eung Ho Choi ) 대한피부과학회 2010 대한피부과학회지 Vol.48 No.3
Background: Environmental factors can influence the pathogenesis of atopic dermatitis. In particular, a westernized residential environment that increases the density of house dust mites and gives rise to sick house syndrome could be a causative factor. Urushiol compounds extracted from Rhus verniciflua, a lacquer tree, have anti-insect and anti-microbial actions and reduce TVOC (total volatile organic compounds). Objective: The purpose of this study was to elucidate the effects of paint containing a novel polyurushiol synthesized from the extract of Rhus verniciflua on indoor air quality and atopic dermatitis patients. Methods: Nine patients with atopic dermatitis resistant to ordinary treatments were enrolled in this clinical trial. Patient rooms were painted with paint containing a novel polyurushiol extracted and synthesized from Rhus verniciflua. We measured TVOC before and after the painting. After a month, patients were evaluated with objective indices such as EASI score, serum IgE, eosinophil levels, and subjective satisfaction. Results: Seven of nine patients showed objective or subjective improvements of clinical symptoms, and TVOCs were reduced after painting. The questionnaire indicated that many patients felt an improvement in air quality. Conclusion: Painting with a novel polyurushiol synthesized from the extract of Rhus verniciflua could improve indoor air quality and atopic dermatitis. (Korean J Dermatol 2010;48(3):198~205)
2-클로로벤질 알코올 및 2,4-디클로로벤질 알코올 유도체를 이용한 TDI, MDI 및 HDI의 가스크로마토그래피 분석
윤주송 ( Ju Song Yun ),박준호 ( Jun Ho Park ),이강명 ( Kang Myoung Lee ),최홍순 ( Hong Soon Choi ),조영봉 ( Young Bong Cho ),고상백 ( Sang Baek Koh ),차봉석 ( Bong Suk Cha ) 한국산업위생학회 2006 한국산업보건학회지 Vol.16 No.3
Objectives: The objective of this study was to propose the total isocyanate analytical method which involves derivation of 2,4-toluene diisocyanate(2,4-TDI), 2,6-toluene diisocyanate(2,6-TDI), 4,4`-methylenediphenyl diisocyanate(4,4`-MDI) and 1,6-hexamethylene diisocyanate(1,6-HDI) using 2-chlorobenzyl alcohol(2-CBA) or 2,4-dichlorobenzyl alcohol(2,4-DCBA), and analyzing of hydrolysate of the synthesized urethane with the gas chromatography(GC)/flame ionization detector(FID), GC/pulsed discharge ionization detector-electron capture detector(PD-ECD) and GC/mass selective detector(MSD). Methods: Urethanes were synthesized by reacting 2,4-TDI, 2,6-TDI, 4,4`-MDI and 1,6-HDI to 2-CBA or 2,4-DCBA. Urethanes was verified by TLC, HPLC/UVD and GC/MSD. For field application, the most suitable condition that 2-CBA coated in glass fiber filter removed completely and urethanes were not removed was searched. 2-CBA generated from hydrolysis of urethanes according to hydrolysis conditions. Diisocyanates were collected on field air and analyzed. Results: Urethanes which were white and solid phase synthesized by reacting 2,4-TDI, 2,6-TDI, 4,4`-MDI, 1,6-HDI and 2-CBA or 2,4-DCBA. And urethanes were verified by TLC, HPLC/UVD and GC/MSD. The most suitable conditions to remove 2-CBA coated in glass fiber filter were 87℃ and 20 mmHg and urethanes were not removed under same condition. Hydrolysis yields of urethanes were 99% to 111%. 2-CBA, the hydrolysate of urethanes was analyzed by GC/FID, GC/PD-ECD and GC/MSD. Conclusions: Simultaneous analysis of 2,4-TDI, 2,6-TDI, 4,4`-MDI and 1,6-HDI deriving with 2-CBA and 2,4-DCBA, along with a total isocyanate analysis, was feasible with GC/FID, GC/PD-ECD and GC/MSD. This result will be a guide of further study on total isocyanate analysis.