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测定了不同萃取剂和盐对邻二甲苯-苯乙烯近沸程物系相对挥发度的影响,研究了盐质量浓度、萃取剂加入速率和回流比对加盐萃取精馏的影响,并建立了反映塔顶馏出液中邻二甲苯质量分数与各因素关系的回归模型。研究结果表明,环丁砜(DMSO)-水(质量分数3%)-硫氰酸钾(KCNS,0.03 g/mL)可作为加盐萃取精馏分离邻二甲苯和苯乙烯体系的最佳加盐萃取剂。
The effects of different extractants and salts on the relative volatility of o-xylene-styrene near-boiling range system were studied. The effects of salt concentration, extractant addition rate and reflux ratio on the extractive distillation of salt were studied. A regression model reflecting the relationship between ortho-xylene mass fraction and various factors in overhead distillate. The results showed that sulfite (DMSO) - water (3%) and potassium thiocyanate (KCNS, 0.03 g / mL) could be used as the optimal salt extraction for o-xylene and styrene systems Agent.