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In this study, we demonstrate the effects of the acidic properties of montmorillonite (MMT), which is commonly used as a catalyst, on the conversion and selectivity of the dimer acid methyl ester (DAME) synthesis. We synthesize DAME by the dimerization of conjugated linoleic acid methyl ester (CLAME) and oleic acid methyl ester using MMT KSF. Incidentally, trimer acid methyl ester was formed as a by-product during the DAME synthesis. There is a necessity to adequately adjust the strength and quantity of the acid site to control the selectivity of DAME. Therefore, we vary the pH of the MMT acid by using various metal hydroxides. The purpose of this study is to increase the yield of monocyclic dimer acid methyl ester, which is a substance with adequate physical properties for industrial applications (e.g., lubricant and adhesive, etc.), using a heterogeneous catalyst. We report the dimerization of fatty acid methyl ester by using base treated-KSF, and apply it to conjugated soybean oil methyl ester. Then, we transmute the acid site properties of KSF, such as pH of 5 wt.% slurry KSF and various alkali metals (Li, Na, K, Ca). Characterization of base treated-KSF using a pH meter, x-ray diffraction, inductively coupled plasma-atomic emission spectrometer, Brunauer–Emmett–Teller surface analysis, and temperature-programmed desorption. We conduct an analysis of CLAME and DAME using nuclear magnetic resonance spectroscopy, gas chromatography, and gel permeation chromatography. Through these experiments, we demonstrate the effects of the acidic properties of KSF on the conversion and selectivity of the DAME synthesis, and evaluate its industrial potential by application to waste vegetable oil.

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기사명 저자명 페이지 원문 목차
DN 250만 250℃고온 스팀환경에서 운전되는 단열 브러쉬 실 마모효과에 관한 실험적 연구 = Experimental study on the wear effects of a brush seal in DN 2.5million in a 250℃ high - temperature steam environment 하윤석, 하태웅, 이용복 p.99-105

볼 베어링 및 가스 포일 베어링으로 지지되는 고속 전동기의 회전체 관성정지 및 가속 성능 연구 = Rotor coastdown and acceleration performances of high-speed motors supported on ball bearings and gas foil bearings 문형욱, 서정화, 김태호 p.123-131

염기 처리된 montmorillonite를 이용한 다이머산 메틸에스테르의 합성 = Synthesis of dimer acid methyl ester using base-treated montmorillonite 육정숙, 신지훈, 김영운 p.132-138

오일리스 부시용 고체윤활제 개발 = Development of solid lubricants for oil-less bush 공호성, 한흥구, 김진욱, 김경석, 박종식 p.87-93

리블렛 표면에서 유적의 젖음성에 대한 수치 해석 = Wettability simulation of oil droplet on riblet surface 김태완 p.94-98

Application of ta-C coating on WC mold to molded glass lens Woo-Young Lee, Ju-hyun Choi p.106-113

볼 베어링 및 가스 포일 베어링으로 지지되는 소형 고속 전동기의 진동 특성 = Vibrational characteristics of high-speed motors with ball bearings and gas foil bearings supports 서정화, 김태호 p.114-122

상대재 내식성이 철강재료의 미끄럼마모 특성에 미치는 영향 = Effects of corrosion resistance characteristics of opponent materials in relative motion on sliding wear behavior of mild carbon steel 이한영 p.139-147

참고문헌 (18건) : 자료제공( 네이버학술정보 )

참고문헌 목록에 대한 테이블로 번호, 참고문헌, 국회도서관 소장유무로 구성되어 있습니다.
번호 참고문헌 국회도서관 소장유무
1 Lim, Y. K., Lee, J. M., Kim, J. R., Ha, J. H., “Mechanism of lubricity improvement by biodies-els”, J. Korean Soc. Tribol. Lubr. Eng., Vol. 32, No. 3, pp. 95-100, 2016. 미소장
2 Son, J. M., Kim, N. K., Shin, J., Chung, K., Yoon, B. T., Kim, Y.-W., “Synthesis and lubricant proper-ties of vegetable oil based on estolides”, J. Korean Soc. Tribol. Lubr. Eng., Vol. 31, No. 5, pp. 195-204, 2015. 미소장
3 Lim, Y. K., Lee, C. H., “The lubricity of biodiesel as alternative fuel”, J. Korean Soc. Tribol. Lubr. Eng., Vol. 26, No. 1, pp. 73-82, 2010. 미소장
4 Prediction of cetane number of biodiesel fuel from the fatty acid methyl ester (FAME) composition 네이버 미소장
5 Active sites in the clay catalysed dimerisation of oleic acid 네이버 미소장
6 Dimer acid structures. the thermal dimer of methyl 10‐trans, 12‐trans, linoleate 네이버 미소장
7 Westfechtel, A. R., Albiez, W., Zander, L., and Hor-lacher, P., Method for the production of conjugated linoleic acids, US Patent No. 0, 106, 238, 2006. 미소장
8 Isomerization of methyl linoleate on supported ruthenium-nickel catalyst 네이버 미소장
9 Soybean oil methyl esters preparation using NaX zeolites loaded with KOH as a heterogeneous catalyst 네이버 미소장
10 Elsasser, A. F., and McCargar, L. A., Method of pre-paring dimeric fatty acids and/or esters thereof con-taining low residual interesters and the resulting dimeric fatty acids and/or dimeric fatty esters, US Patent No. 6, 187, 903, 2001. 미소장
11 An Efficient Route to Difluoromethylated Pyridines 네이버 미소장
12 Cation-Exchange Properties of Natural Zeolites 네이버 미소장
13 Satterfield, C. N., Heterogeneous Catalysis in Industrial Practice, 2nd Edition, McGraw-Hill, NY, USA, 1991. (ISBN 0070548862) 미소장
14 A comparative IR characterization of acidic sites on HY zeolite by pyridine and CO probes with silica-alumina and γ-alumina references. 네이버 미소장
15 Octaviani, S., Krisnandi, Y., Abdullah, I. and Sihombing, R., “The Effect of Alkaline Treatment to the Structure of ZSM5 Zeolites”, Makara J. Sci., Vol. 16, No. 3, pp. 155-162, 2012. 미소장
16 Analysis of conjugated linoleic acid esters by nuclear magnetic resonance spectroscopy 네이버 미소장
17 On the introduction of intracrystalline mesoporosity in zeolites upon desilication in alkaline medium 네이버 미소장
18 Mochizuki, H., Yokoi, T., Imai, H., Namba, S., Kondo, J. N. and Tatsumi, T., “Effect of desilication of H-ZSM-5 by alkali treatment on catalytic perfor-mance in hexane cracking”, Appl. Catal., A, Vol. 449, pp. 188-197, 2012. 미소장

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