• 자원리싸이클링
• /
• 제8권3호
• /
• pp.31-36
• /
• 1999

아크릴로니트릴 제조공정 중 부산물로 생성되는 물과 아세토니트릴 공비혼합물을 분비, 회수하기 위하여 혼합용매로서 toluene-ethylacetate를 선택하여 $25^{\circ}C$에서 4성분계 toluene(1)-water(2)-acetonitrile(3)-ethylacetate(4)에 대한 액-액평형 데이터를 구하였다. Tie-line 계산치를 예측하기 위하여 실험치를 UNIFA 모델식의 파라미터와 상호연관시켜 비교하였다. 또한 용매의 성능을 비교하기 위하여 분배계수 및 선택도를 고찰하였다.

• 한국가스학회지
• /
• 제13권5호
• /
• pp.20-25
• /
• 2009

혼합물의 폭발하한계는 Raoult의 법칙, Dalton의 법칙, Le Chatelier 법칙 그리고 활동도계수 모델식을 이용하여 예측될 수 있다. 본 연구에서는 ethylacetate-ethanol 계와 ethanol+toluene 계의 폭발하한계를 예측하기 위해 Raoult의 법칙 그리고 활동도계수 모델식인 van Laar 식과 Wilson 식을 이용하였다. 계산값과 문헌값을 비교한 결과, Raoult의 법칙에 의한 계산값이 활동도 모델식에 의한 계산값 보다 모사성이 뛰어남을 확인하였다.

• 한국안전학회지
• /
• 제20권3호
• /
• pp.91-97
• /
• 2005

The research on the explosive limits is one of fundamental fields of combustion process, and information on the explosive limits of mixture of fuel and oxidant, with or without additives, is very important for the prevention in industrial fire and explosion accidents. Explosive limits of all compounds and solvent mixtures can be calculated with the appropriate use of the fundamental laws of Raoult, Batten, Le Chatelier and MRSM(modified response surface methodology) model. In this study, the reference values of lower explosive limits(LEL) of the ethanol+toluene+ethylacetate system were compared with the calculated values by using the solution thermodynamics and the MRSM model, respectively. The values calculated by the proposed equations were a good agreement with literature data within a few percent. By means of this methodology, it is possible to evaluate reliability of experimental data of the lower explosive limits of the flammable mixtures. Also, from given results, it is possible to predict explosive limits of the other flammable liquid mixtures used in the chemical process by the use of the proposed equations.

• 한국안전학회지
• /
• 제16권4호
• /
• pp.103-108
• /
• 2001

Explosive limit is one of the major physical properties used to determine the fire and explosion hazards of the flammable substances. Explosive limits are used to classify flammable liquids according to their relative flammability. Such a classification is important for the safe handling of flammable liquids which constitute the solvent mixtures. Explosive limits of all compounds and solvent mixtures can be calculated with the appropriate use of the fundamental laws of Raoult, Dalton, Le Chatelier and activity coefficient models. In this paper, Raoult,s law and van Laar equation(activity coefficient model) are shown to be applicable for the prediction of the explosive limits in the flammable ethylacetate-toluene system. The values calculated by the proposed equations were a good agreement with literature data within a given percent. From a given results, by the use of the proposed equations, it is possible to predict explosive limits of the other flammable mixtures. It is hoped eventually that this method will permit the estimation of the explosive Properties of flammable mixtures with improved accuracy and the broader application for other flammable stances.

• 공업화학
• /
• 제5권6호
• /
• pp.1016-1023
• /
• 1994

Acrylonitrile 제조시 부산물로 생성되는 acetonitrile-water 공비혼합물에서 용매추출하여 acetonitrile을 회수하기 위하여 benzene, toluene, o-xylene, ethylacetate 및 monochlorobenzene을 용매로 선택하여 $25^{\circ}C$ 에서 solvent(1)-water(2)-acetonitrile(3)계의 액-액 평형데이타를 구하였으며, 그 실험데이타의 건전성을 조사하였고, tie line과 plait point조성을 결정하였다. 또한 NRTL, UNIQUAC 및 modified UNIQUAC모델식에 적용하여 parameter를 추산하고 각 용매에 대한 분배계수와 선택도를 결정하였다.