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    • 6. 发明公开
    • 스티렌의 증류
    • 苯乙烯的蒸馏
    • KR1020020012147A
    • 2002-02-15
    • KR1020010047204
    • 2001-08-06
    • 바스프 에스이
    • 슈마우스,파울루스메츠거,베르너,게오르그
    • C07C7/04
    • C07C7/05C07C15/46
    • PURPOSE: A method for distilling a vinyl aromatic monomer is provided, which is suitable for destabilizing and purifying the styrene stabilized with 4-t-butylcatechol for transportation. CONSTITUTION: The method comprises the step of distilling a vinyl aromatic monomer in the presence of 4-t-butylcatechol and oxygen containing no aromatic nitro or amino compound. The vinyl aromatic monomer is preferably styrene. 4-t-Butylcatechol is fed into a distillation apparatus together with a vinyl aromatic monomer, and the concentration of 4-t-butylcatechol is 200-15,000 ppm at the bottom part of the distillation apparatus based on the concentration of the vinyl aromatic monomer. The vacuum distillation is carried out at a temperature of 40-125 deg.C. A gas containing oxygen is fed by a circulation pump equipped at the suction side upstream of a distillation assembly. The content of oxygen fed is 0.01-0.5 wt.% based on the weight of the vinyl aromatic monomer.
    • 目的:提供一种蒸馏乙烯基芳族单体的方法,适用于不稳定和纯化用4-叔丁基邻苯二酚稳定运输的苯乙烯。 构成:该方法包括在4-叔丁基儿茶酚和不含芳族硝基或氨基化合物的氧的存在下蒸馏乙烯基芳族单体的步骤。 乙烯基芳族单体优选为苯乙烯。 基于乙烯基芳族单体的浓度,将4-叔丁基邻苯二酚与乙烯基芳族单体一起进料到蒸馏装置中,并且在蒸馏装置的底部,4-叔丁基邻苯二酚的浓度为200-15,000ppm。 真空蒸馏在40-125℃的温度下进行。 含有氧的气体通过设置在蒸馏组件上游的吸入侧的循环泵进料。 供氧量为乙烯基芳族单体重量的0.01-0.5重量%。