Recovery of 2,6-dialkyl-naphthalene isomers
    2.
    发明授权
    Recovery of 2,6-dialkyl-naphthalene isomers 失效
    2,6-二烷基 - 萘异构体的回收

    公开(公告)号:US4900717A

    公开(公告)日:1990-02-13

    申请号:US152430

    申请日:1988-02-04

    摘要: In a process for selective crystallization of 2,6-dialkyl-naphthalene selected from the group consisting of methyl-n-propyl-naphthalene, methyl isopropyl-naphthalene, ethyl-isopropyl-napthalene, ethyl-n-butyl-naphthalene, di-n-propyl-naphthalene, diisopropyl-naphthalene, methyl-amyl-naphthalene, ethyl-amyl-naphthalene, propyl-amyl-naphthalene, di-n-butyl-naphthalene and diisobutyl-naphthalene from their isomer mixtures from a polar solvent solution, the improvement comprising effecting the crystallization with constant stirring at a temperature from 25.degree. to -30.degree. C. to obtain the 2,6-dialkyl-naphthalene at least 95% pure.

    摘要翻译: 在选自甲基 - 正丙基 - 萘,甲基异丙基 - 萘,乙基 - 异丙基萘,乙基 - 正丁基 - 萘,二 - 丙基 - 萘,二异丙基萘,甲基 - 戊基 - 萘,乙基 - 戊基 - 萘,丙基 - 戊基 - 萘,二正丁基 - 萘和二异丁基 - 萘从它们的极性溶剂溶液的异构体混合物, 包括在25至-30℃的温度下不断搅拌下进行结晶,得到至少95%纯度的2,6-二烷基萘。