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    Method for concentrating 2,6-dimethylnaphthalene
    1.
    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

    申请人： Noboru Nakao ,  Koji Yamamoto ,  Masahiro Motoyuki

    发明人： Noboru Nakao ,  Koji Yamamoto ,  Masahiro Motoyuki

    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。

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

    申请人： Masahiro Motoyuki ,  Koji Yamamoto ,  Shingo Yoshida ,  Seiichi Yamamoto ,  Ajit Vishwanath Sapre ,  John Paul Mc Williams ,  Susan Patricia Donnelly ,  Stuart Damon Hellring

    发明人： Masahiro Motoyuki ,  Koji Yamamoto ,  Shingo Yoshida ,  Seiichi Yamamoto ,  Ajit Vishwanath Sapre ,  John Paul Mc Williams ,  Susan Patricia Donnelly ,  Stuart Damon Hellring

    IPC分类号： C07C15/24 ,  C08G63/189 ,  C07C5/22 ,  C08G63/06

    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
    4.
    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

    申请人： Masahiro Motoyuki ,  Koji Yamamoto ,  Ajit Vishwanath Sapre ,  John Paul McWilliams

    发明人： Masahiro Motoyuki ,  Koji Yamamoto ,  Ajit Vishwanath Sapre ,  John Paul McWilliams

    IPC分类号： B01J29/04 ,  C07B61/00 ,  C07C2/66 ,  C07C6/12 ,  C07C15/24 ,  C07C1/01 ,  C07C2/64 ,  C07C2/68 ,  C07C5/22

    CPC分类号： C07C15/24 ,  C07C2/66 ,  C07C6/126 ,  C07C2529/70

    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 producing 2,6-dimethylnaphthalene
    7.
    发明授权
    Method for producing 2,6-dimethylnaphthalene 有权
    2,6-二甲基萘的制备方法

    公开(公告)号：US06894202B1

    公开(公告)日：2005-05-17

    申请号：US10069502

    申请日：2000-08-30

    申请人： Koji Yamamoto ,  Seiichi Yamamoto ,  Takeharu Tanaka ,  Masahiro Motoyuki ,  Shingo Yoshida

    发明人： Koji Yamamoto ,  Seiichi Yamamoto ,  Takeharu Tanaka ,  Masahiro Motoyuki ,  Shingo Yoshida

    IPC分类号： C07C7/14 ,  C07C15/24

    CPC分类号： C07C7/14 ,  C07C15/24

    摘要： An object of the present invention is to provide a method for manufacturing 2,6-DMN, in which even when a mixture containing DMN isomers which includes 5 wt % or more of 2,7-DMN is used, a highly pure 2,6-DMN can be obtained. The method for manufacturing the highly pure 2,6-dimethylnaphthalene of the present invention comprises performing cooling crystallization of a mixture containing dimethylnaphthalenes which includes 2,6-dimethylnaphthalene, performing solid-liquid separation to obtain a solid component, and washing the solid component using a solvent, wherein the solid-liquid separation performed after the cooling crystallization includes press filtration. In the present invention, the pressure of the press filtration is preferably 10 kg/cm2 or more, and according to the method of the present invention, even when a DMN mixture containing 5 wt % or more of 2,7-DMN is used as a feedstock, a highly pure 2,6-DMN can be manufactured, and in addition, even when a DMN mixture containing less than 25 wt % of 2,6-DMN is processed by cooling crystallization, a highly pure 2,6-DMN can be manufactured.

    摘要翻译： 本发明的目的是提供一种2,6-DMN的制造方法，即使使用含有5重量％以上的2,7- DMN的DMN异构体的混合物，可以使用高纯度的2,6 -DMN可以得到。 制造本发明的高纯度2,6-二甲基萘的方法包括进行包含2,6-二甲基萘的二甲基萘的混合物的冷却结晶，进行固液分离以获得固体成分，并使用 溶剂，其中在冷却结晶后进行的固 - 液分离包括压滤。 在本发明中，压滤机的压力优选为10kg / cm 2以上，根据本发明的方法，即使当含有5重量％以上的DMN混合物 2,7-DMN用作原料，可以制造高纯度的2,6-DMN，此外，即使当通过冷却结晶处理含有少于25重量％的2,6-DMN的DMN混合物时， 可以制造高纯度的2,6-DMN。

    Method for making high-purity naphthalenedicarboxylic acid
    8.
    发明授权
    Method for making high-purity naphthalenedicarboxylic acid 失效
    制备高纯度萘二羧酸的方法

    公开(公告)号：US06717009B2

    公开(公告)日：2004-04-06

    申请号：US10265401

    申请日：2002-10-07

    申请人： Masahiro Motoyuki ,  Tomoki Uemura ,  Koji Yamamoto

    发明人： Masahiro Motoyuki ,  Tomoki Uemura ,  Koji Yamamoto

    IPC分类号： C07C5142

    CPC分类号： C07C51/487 ,  C07C51/265 ,  C07C51/43 ,  C07C51/47 ,  C07C63/26 ,  C07C63/38

    摘要： A high-purity naphthalenedicarboxylic acid is produced by a method including Steps [1] and [2]: In Step [I], a raw mixture of crude terephthalic acid and crude naphthalenedicarboxylic acid is dissolved into high-temperature high-pressure water to form a dibasic acid solution wherein the crude naphthalenedicarboxylic acid content is 0.1 to 10 mass percent of the crude terephthalic acid content, the dibasic acid solution is brought into contact with hydrogen in the presence of a catalyst. In Step [II], the resultant in the dibasic acid solution is crystallized by multiple stages while the temperature and the pressure are reduced for each stage, and acid mixtures containing enriched naphthalenedicarboxylic acid or enriched terephthalic acid are obtained by solid-liquid separation.

    摘要翻译： 通过包括步骤[1]和[2]的方法制备高纯度萘二羧酸：在步骤[I]中，将粗对苯二甲酸和粗萘二甲酸的粗混合物溶解在高温高压水中形成 二萘酸溶液，其中粗萘二羧酸含量为粗对苯二甲酸含量的0.1〜10质量％，二元酸溶液在催化剂存在下与氢接触。 在步骤[II]中，将二元酸溶液中的所得物在多个阶段中结晶，同时每个阶段降低温度和压力，通过固液分离获得含有富含萘二甲酸或富对苯二甲酸的酸混合物。

    Method for manufacturing 2,6-dimethylnaphthalene
    10.
    发明授权
    Method for manufacturing 2,6-dimethylnaphthalene 有权

    公开(公告)号：US06525235B2

    公开(公告)日：2003-02-25

    申请号：US09965822

    申请日：2001-10-01

    申请人： Shingo Yoshida ,  Masahiro Motoyuki ,  Tomoki Uemura ,  Koji Yamamoto

    发明人： Shingo Yoshida ,  Masahiro Motoyuki ,  Tomoki Uemura ,  Koji Yamamoto

    IPC分类号： C07C714

    CPC分类号： C07C7/14 ,  C07C15/24

    摘要： The present invention provides a method for manufacturing a highly pure 2,6-dimethylnaphthalene having a purity of 99% or more even when a mixture of dimethylnaphthalene isomers containing 5 wt % or more of 2,7-dimethylnaphthalate is used as a feedstock. The method for manufacturing 2,6-dimethylnaphthalene comprises a step of performing crystallization and solid-liquid separation of a liquid primarily containing dimethylnaphthalene isomers so that the liquid is separated into a cake containing the dimethylnaphthalene isomers and a mother liquor, and a step of performing separation/purification of the cake. In the method described above, the crystallization and the solid-liquid separation are performed under the condition in which the ratio of the content of 2,6-dimethylnaphthalene in the mother liquor to that of 2,7-dimethylnaphthalene therein is not less than 1 so that the content of 2,6-dimethylnaphthalene in the cake is 60% or more and that the content of 2,7-dimethylnaphthalene therein is 6.5% or less. As a result, a highly pure 2,6-dimethylnaphthalene is obtained by performing the separation/purification of the cake.