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US5145562A Extractive distillation of mixtures containing aromatic and olefinic hydrocarbons 失效
含芳烃和烯烃的混合物的萃取蒸馏

Extractive distillation of mixtures containing aromatic and olefinic
hydrocarbons
摘要:
Aromatic hydrocarbons containing 6-10 carbon atoms per molecule are separated from close-boiling olefinic hydrocarbons by extractive distillation employing as solvent either N-methyl-2-thiopyrrolidone alone, or a mixture of N-(.beta.-mercaptoethyl)-2-pyrrolidone and N-methyl-2-thiopyrrolidone, or a mixture of N-(.beta.-mercaptoethyl)-2-pyrrolidone and N-methyl-2-pyrrolidone.
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