Isomerization of dimethylnaphthalene to produce 2,6-dimethylnaphthalene
    3.
    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。

    Process for preparing dialkylnaphthalene
    6.
    发明授权
    Process for preparing dialkylnaphthalene 失效
    制备二烷基萘的方法

    公开(公告)号:US6011190A

    公开(公告)日:2000-01-04

    申请号:US887052

    申请日:1997-07-02

    摘要: 2,6-Dialkylnaphthalene is prepared from a feedstock comprising naphthalene and an alkylating agent, by a process comprising the steps:(I) transalkylating isomers of dialkylnaphthalene and naphthalene to produce monoalkylnaphthalene and isomers of dialkylnaphthalene;(II) separating the product obtained in step (I) into naphthalene, monoalkylnaphthalene, dialkylnaphthalene and other components;(III) alkylating the monoalkylnaphthalene fraction from step (II) with an alkylating agent to produce dialkylnaphthalene; and(IV) separating 2,6-dialkylnaphthalene from the dialkylnaphthalene fraction in step (II),wherein at least step (I) or step (III) is conducted in the presence of a catalyst having a composition comprising a synthetic zeolite having an X-ray diffraction pattern with an interplanar d-spacing (.ANG.)______________________________________ 12.36 .+-. 0.4 11.03 .+-. 0.2 8.83 .+-. 0.14 6.18 .+-. 0.12 6.00 .+-. 0.10 4.06 .+-. 0.07 3.91 .+-. 0.07 3.42 .+-. 0.06. ______________________________________

    摘要翻译: 2,6-二烷基萘由包含萘和烷基化剂的原料制备,通过包括以下步骤的方法制备:(I)将烷基萘和萘的异构体转烷基化以产生单烷基萘和二烷基萘的异构体; (II)将步骤(I)中获得的产物分离成萘,单烷基萘,二烷基萘等组分; (III)用烷基化剂烷基化来自步骤(II)的单烷基萘馏分以制备二烷基萘; 和(IV)在步骤(II)中从二烷基萘馏分中分离2,6-二烷基萘,其中至少步骤(I)或步骤(III)在具有包含具有X 具有面间d间距(ANGSTROM)的-ray衍射图 - 12.36 +/- 0.4-11.03 +/- 0.2-8.83 +/- 0.14-6.18 +/- 0.12- 6.00 +/- 0.10-4.06 +/- 0.07- 3.91 +/- 0.07 - 3.42 +/- 0.06。 -

    Method for concentrating 2,6-dimethylnaphthalene
    10.
    发明授权
    Method for concentrating 2,6-dimethylnaphthalene 有权
    浓缩2,6-二甲基萘的方法

    公开(公告)号:US06706939B2

    公开(公告)日:2004-03-16

    申请号:US10193228

    申请日:2002-07-12

    IPC分类号: C07C712

    CPC分类号: C07C7/13 C07C15/24

    摘要: A method for concentrating 2,6-dimethylnaphthalene in a dimethylnaphthalene isomer mixture includes supplying the dimethylnaphthalene isomer mixture to an adsorption column packed with Y-type zeolite. In this instance, by setting the value derived from the expression (u1/3/&egr;)d−5/3 at 14 (m5/3 s−1/3 kg−1) or more, the concentration ratio of 2,6-dimethylnaphthalene to 2,7-dimethylnaphthalene can be 2.0 or more. u here represents the linear velocity (m/s) of the dimethylnaphthalene isomer mixture supplied to an adsorption column, &egr; represents the packing density (kg/m3) of Y-type zeolite, and d represents the grain size (m) of the Y-type zeolite.

    摘要翻译: 将2,6-二甲基萘浓缩在二甲基萘异构体混合物中的方法包括将二甲基萘异构体混合物供应到填充有Y型沸石的吸附塔上。 在这种情况下,通过在14(m <5/3> s <-1 / 3> kg -1)处设定从表达式(u <1/3 /ε)d <-5/3>导出的值 )以上时,2,6-二甲基萘与2,7-二甲基萘的浓度比可以为2.0以上。 这里表示供给吸附塔的二甲基萘异构体混合物的线速度(m / s),ε表示Y型沸石的填充密度(kg / m 3),d表示粒径(μm) 的Y型沸石。