HWAHAK KONGHAK, Vol.31, No.6, 701-706, December, 1993
Thiourea 부가결정화에 의해 C9+ 납사분해 잔사유로부터 Dimethylethylbenzene 분리
Separation of dimethylethylbenzene from C9+ Naphtha Cracking Raffinate by Adductive Crystallization Using Thiourea
초록
Thiourea 부가결정화를 이용하여 납사분해 공장에서 부생되는 C9+ 잔사유로부터 dimethylethylbenzene(DMEB)을 분리하였다. Thiourea 부가에 미치는 inductor 영향, thiourea의 용매 영향, 부가결정화 온도의 영향 등을 검토하였다. DMEB는 4단의 thiourea 부가에 의하여 96wt% 순도로 분리될 수 있었다. 본 연구에서 조사된 inductor중에 DMEB의 선택성이 가장 뛰어난 물질은 1,2,4-trichlorobenzene이었다. Thiourea의 알코올 용매에서 thiourea 부가에 미치는 용매의 선택성은 용매의 극성에 의존함을 알 수 있었다.
The separation of dimethylethylbenzene(DMEB) from the C9+ raffinate found in the process of ethylene production by the pyrolysis of naphtha was studied using adductive crystallization with thiourea. The effect of thiourea adduction were investigated on the inductors, solvent of thiourea and adduction temper-ature. DMEB could be separated by multistage adductive crystallization from C9+, raffinate as a high purity. The most effective material of the inductor investigated in this study was 1,2,4-trichlorobenzene. The selectiv-ity of solvents in thiourea adduction depended on the polarity of solvents(alcohols), and the most effective solvent of those was methanol.
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