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초임계 유체 추출에 의한 메조페이스 핏치의 제조-초임계 톨루엔에 불용인 석탄 타르 핏치의 특성-
Preparation of Mesophase Pitch by Supercritical Fluid Extraction-Properties of Insoluble Coal Tar Pitch in Supercritical Toluene-
HWAHAK KONGHAK, October 1993, 31(5), 577-583(7), NONE
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Abstract
온도 330℃, 압력 50bar, 70bar, 90bar의 조건에서 등방성 석탄 타르 핏치로부터 초임계 톨루엔 가용분을 추출하였다. 초임계 톨루엔 가용분의 제거로 잔여 핏치의 벤젠 및 퀴놀린 불용분의 함량, C/H 원자비, 연화점이 증가되었다. 잔여 핏치의 β-resin 함량은 가용분의 추출량이 증가함에 따라 비례하여 증가하였고, 본 실험조건하에서는 최대 약 10wt% 증가하였다. 잔여 핏치를 열처리 하는 동안 메조페이스의 형성을 관찰한 결과 추출량이 많은 잔여 핏치일수록 열처리시 신속하게 100vol% 메조페이스로 전환됨으로써 초임계 톨루엔 가용분의 제거로 등방성 핏치의 탄화 특성이 개선되었음을 보여주었다.
Supercritical toluene solubles in isotropic coal tar pitch is extracted at conditions of 330℃, and 50 bar, 70 bar, and 90 bar,respectively. Benzene and quinoline insoluble contents, C/H atomic ratio, and softening point of extraction residues were increased by the extraction residues were increased by the extraction of supercritical toluene solubles. β-resin content in extraction residues increased as extraction and the maximum value is reached at about 10wt% in the experiment conditions. Mesophase formation rate in thermal treatment of extraction residues is in parallel with extraction amount, and it shows the modification of carbonization properties of isotropic coal tar pitch by extraction of solubles with supercritical toluene.
References
Chwastiak S, Barr JB, Didchenko R, Carbon, 17, 49 (1979)
Singer LS, Fuel, 60, 839 (1981)
Diefendorf RJ, Riggs DM, U.S. Patent, 3,208,267 (1980)
Hutchenson KW, Roebers JR, Thies MC, J. Supercrit. Fluids, 3, 7 (1990)
Shishido M, Yamada S, Arai K, Saito S, Fuel, 69, 1490 (1990)
Kim CJ, In SJ, Jo YG, Ryu SK, Rhee BS, Tanso, 155, 411 (1992)
Kim CJ, In SJ, Jo YG, Ryu SK, Rhee BS, HWAHAK KONGHAK, 31(1), 1 (1993)
Korai Y, Mochida I, Carbon, 25, 249 (1987)
Otani S, Sanada Y, "Tanso Kakougaku no Kiso," Omu-sya, Tokyo (1980)
Azami K, Kato O, Takashima H, Yamamoto S, Yokono T, Sanada Y, International Carbon Conference, 19 (1988)
Bhatia G, Fitzer E, Kompalik D, Carbon, 24, 489 (1986)
Singer LS, Fuel, 60, 839 (1981)
Diefendorf RJ, Riggs DM, U.S. Patent, 3,208,267 (1980)
Hutchenson KW, Roebers JR, Thies MC, J. Supercrit. Fluids, 3, 7 (1990)
Shishido M, Yamada S, Arai K, Saito S, Fuel, 69, 1490 (1990)
Kim CJ, In SJ, Jo YG, Ryu SK, Rhee BS, Tanso, 155, 411 (1992)
Kim CJ, In SJ, Jo YG, Ryu SK, Rhee BS, HWAHAK KONGHAK, 31(1), 1 (1993)
Korai Y, Mochida I, Carbon, 25, 249 (1987)
Otani S, Sanada Y, "Tanso Kakougaku no Kiso," Omu-sya, Tokyo (1980)
Azami K, Kato O, Takashima H, Yamamoto S, Yokono T, Sanada Y, International Carbon Conference, 19 (1988)
Bhatia G, Fitzer E, Kompalik D, Carbon, 24, 489 (1986)
