Isomerization of dimethylnaphthalene to produce 2,6-dimethylnaphthalene
    1.
    发明授权
    Isomerization of dimethylnaphthalene to produce 2,6-dimethylnaphthalene 失效
    二甲基萘异构化生成2,6-二甲基萘

    公开(公告)号:US6018087A

    公开(公告)日:2000-01-25

    申请号:US948666

    申请日:1997-10-10

    CPC分类号: C07C15/24 C08G63/189

    摘要: The present invention relates to a method of preparing 2,6-dimethylnaphthalene from a feed stream that contains hydrocarbons which contain dimethylnaphthalene isomers. The method includes the following steps:I. distillation and concentration of the dimethylnaphthalene isomers from the feed stream, to form a dimethylnaphthalene fraction,II. isomerization of the dimethylnaphthalene fraction to enrich the dimethylnaphthalene fraction in 2,6-dimethylnaphthalene, to form a 2,6-enriched dimethylnaphthalene fraction,III. purification of 2,6-dimethylnaphthalene from the 2,6-enriched dimethylnaphthalene fraction,wherein step II is conducted in the presence of a catalyst composition containing a synthetic zeolite characterized by an X-ray diffraction pattern including interplanar d-spacing (.ANG.)12.36.+-.10.411.03.+-.0.28.83.+-.10.146.18.+-.0.126.00.+-.0.104.06.+-.0.073.91.+-.0.013.42.+-.0.06,wherein the purification includes crystallization under pressure.

    摘要翻译: 本发明涉及从含有二甲基萘异构体的烃的进料流中制备2,6-二甲基萘的方法。 该方法包括以下步骤:I.从进料流中蒸馏并浓缩二甲基萘异构体,形成二甲基萘馏分。 二甲基萘馏分的异构化以富集2,6-二甲基萘中的二甲基萘馏分,形成富2,6-二甲基萘馏分。 从2,6-富二甲基萘馏分中纯化2,6-二甲基萘,其中步骤II在含有合成沸石的催化剂组合物的存在下进行,该催化剂组合物的特征在于包括平面d间距(ANGSTROM)12.36的X射线衍射图 +/- 10.4 11.03 +/- 0.2 8.83 +/- 10.14 6.18 +/- 0.12 6.00 +/- 0.10 4.06 +/- 0.07 3.91 +/- 0.01 3.42 +/- 0.06,其中纯化包括在压力下的结晶。