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분체공학 , 유동층 , 고분자 , 재료 ( 무기 , 유기 ) : 기름응집법에 의한 무연탄 중의 회분 및 황 성분 제거
손태일(Tae Il Son),이제근(Jae Keum Lee),진경태(Gyoung Tae Jin),김경희(Kyoung Hee Kim) 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.5
A study on the rejection of ash and pyritic sulfur in anthracite coals using oil agglomeration was carried out in a batch type agitation vessel. In this experiment, three kinds of bridging oils such as pentane, heptane, and kerosene were used. Operation variables were oi/coal ratio, agitation speed, tumbling time, and pH. All the experiments were performed at room temperature. It was shown that the parameters used significantly effected on the fixed carbon recovery, and rejection of ash, sulfur, and heavy metals. The maximum values of fixed carbon recovery and rejection of ash and sulfur were over 95%, 65% and 60%, respectively. The optimum operating conditions were obtained at the oil/coal ratio of 0.2 and pH 12.
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손태일 ( Tae Il Son) 한국공업화학회 1993 공업화학 Vol.4 No.2
The industry of amino acids has developed for the synthetic methods, zymotechnics from the methods of extraction. In the present, part of amino acids (L-cystine, L-tyrosine, etc.) is manufactured by the methods of extraction, but most of amino acids is produced by synthetic methods, zymotechnics. Among the methods, the synthetic methods use of cyanic acid, which generate a large of waste water by acid or alkali in hydrolysis. In this point of view, improved new synthetic methods are demanded for being the influence of environment. This article introduces new synthetic methods of phenyl alnine, further more, the recent of research results are introduced to prepare the derivative α-keto acids of precursor for preparing more than particular amino acids.
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