Process for the preparation of micro-mesoporous gel
    4.
    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
    6.
    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。