Method for the separation of zeolites
    3.
    发明授权
    Method for the separation of zeolites 有权
    沸石分离方法

    公开(公告)号:US06924247B2

    公开(公告)日:2005-08-02

    申请号:US10014853

    申请日:2001-12-14

    摘要: The object of the present invention relates to a simple, rapid and inexpensive process for effecting solid-liquid separations in the case of zeolites, also having small crystals. This process, which is particularly useful for the recovery of zeolite crystals in suspension in the crystallization water, comprises treating this suspension of crystals with an acid or one of its precursors and subjecting the resulting mixture to filtration or decanting.According to a particular aspect of the invention, the crystalline phase is separated in a mixture with oxides which can be used as ligands. Said oxides can be generated by the reagents of the zeolite preparation reagent mixture, not transformed into crystalline phase during the synthesis hydrothermal treatment, or they can be added to the suspension of crystals before the separation treatment, or again they can be generated by precursors suitably added to the crystallization slurry.

    摘要翻译: 本发明的目的涉及在具有小晶体的沸石的情况下实现固液分离的简单,快速和便宜的方法。 对于在结晶水中悬浮的沸石晶体的回收特别有用的该方法包括用酸或其前体之一处理该晶体悬浮液,并将所得混合物过滤或倾析。 根据本发明的特定方面,结晶相与可用作配体的氧化物以混合物分离。 所述氧化物可以通过沸石制备试剂混合物的试剂产生,在合成水热处理期间不转化为结晶相,或者可以在分离处理之前加入到晶体悬浮液中,或者再次由前体合成生成 加入到结晶浆料中。

    Process for the preparation of micro-mesoporous gel
    5.
    发明授权
    Process for the preparation of micro-mesoporous gel 失效
    微孔介孔凝胶的制备工艺

    公开(公告)号:US06204217B1

    公开(公告)日:2001-03-20

    申请号:US09172268

    申请日:1998-10-14

    IPC分类号: B01J2108

    摘要: Process for the preparation of a micro-mesoporous gel consisting of a silica matrix in which one or more metal oxides are possibly dispersed comprising: (a) subjecting to hydrolysis and gelification a tetra-alkylorthosilicate with an alkyl-trimethylammonium hydroxide having the formula R(CH3)3N—OH, wherein R is selected from n-butyl, n-pentyl, n-hexyl and n-heptyl, possibly in the presence of one or more metal compounds, the molar ratios in this mixture being: R—OH/SiO2=0-10; R(CH3)3N—OH/SiO2=0.05-0.4; H2O/SiO2=5-40; metal oxides/SiO2=0-0.02; whereas the ratio H2O/R(CH3)3N—OH varies according to the number of carbon atoms in the alkylic chain R as follows: R=n-butyl, H2O/R(CH3-)3N—OH

    摘要翻译: 用于制备由二氧化硅基质组成的微孔介质凝胶的方法,其中一种或多种金属氧化物可能被分散,包括:(a)使原硅酸四烷基酯与具有式R的烷基 - 三甲基氢氧化铵进行水解和凝胶化 CH3)3N-OH,其中R选自正丁基,正戊基,正己基和正庚基,可能在一种或多种金属化合物存在下,该混合物中的摩尔比为:R-OH / SiO2 = 0-10; R(CH3)3N-OH / SiO2 = 0.05-0.4; H2O / SiO2 = 5-40; 金属氧化物/ SiO2 = 0-0.02; 而H 2 O / R(CH 3)3 N-OH的比例根据烷基链R中的碳原子数按如下方式变化:R =正丁基,H 2 O / R(CH 3)3 N-OH 35; R =正戊基,H 2 O / R(CH 3)3 N-OH <70; R =正己基,H 2 O / R(CH 3)3 N-OH <102; R =正庚基,H 2 O / R(CH 3)3 N-OH <136; (b)使步骤(a)中获得的凝胶或固体进行干燥和煅烧。

    Process for the preparation of 2,6-dimethylnaphthalene
    7.
    发明授权
    Process for the preparation of 2,6-dimethylnaphthalene 失效
    2,6-二甲基萘的制备方法

    公开(公告)号:US07241931B2

    公开(公告)日:2007-07-10

    申请号:US11333201

    申请日:2006-01-18

    IPC分类号: C07C5/22 C07C5/27

    摘要: A highly selective process is described for preparing 2,6-dimethylnaphthalene which comprises reacting a naphthalene hydrocarbon selected from naphthalene, methylnaphthalenes, dimethylnaphthalenes, trimethylnaphthalenes, polymethylnaphthalenes, and/or their mixtures with one or more benzene hydrocarbons selected from benzene, toluene, xylenes, trimethylbenzenes, tetramethylbenzenes, pentamethylbenzene and/or hexamethylbenzene, under at least partially liquid phase conditions and in the presence of a catalytic composition comprising a zeolite belonging to the MTW structural type and at least one element selected from P, B and Si. The process is preferably carried out in the presence of a methylating agent.

    摘要翻译: 描述了用于制备2,6-二甲基萘的高选择性方法,其包括将选自萘,甲基萘,二甲基萘,三甲基萘,聚甲基萘和/或其混合物的萘烃与一种或多种选自苯,甲苯,二甲苯, 三甲基苯,四甲基苯,五甲基苯和/或六甲基苯,在至少部分液相条件下和在包含属于MTW结构类型的沸石和选自P,B和Si中的至少一种元素的催化组合物存在下进行。 该方法优选在甲基化剂的存在下进行。