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    • 1. 发明授权
    • Process for the selective hydroxymethylation of nitrotoluenes
    • 硝基甲苯选择性羟甲基化方法
    • US4299992A
    • 1981-11-10
    • US151597
    • 1980-05-20
    • Antal TunglerTibor MatheJozsef PetroZoltan Bende
    • Antal TunglerTibor MatheJozsef PetroZoltan Bende
    • C07C67/00C07C201/00C07C201/12C07C205/19C07C205/26C07C205/34C07C205/37C07C29/38C07C41/18
    • C07C201/12
    • The invention relates to a new process for the selective hydroxymethylation of substituted ortho- or paranitrotoluenes of the general formula (I) ##STR1## in order to prepare nitrophenylalkanols of the general formula (II) ##STR2## In the above formulae the nitro group is attached to the benzene ring in ortho or para position related to the methyl group or the hydroxyalkyl side chain, respectively, X stands for hydrogen, fluorine or an alkyl, alkoxy or nitro group, and n is 1, 2 or 3.According to the process of the invention the starting substance is hydroxymethylated with an excess of formaldehyde at a temperature above room temperature in dimethyl formamide and in the presence of a strong base. The reaction is performed in dimethyl formamide containing 0.1 to 1% by weight of water, and the reaction is directed to the formation of the required end-product by properly adjusting the temperature and the amount of formaldehyde and the base with respect to the starting compound of the general formula (I).In this way the required end-products can be prepared selectively also on an industrial scale.
    • 本发明涉及用于制备通式(I)的取代的邻 - 或对硝基甲苯的选择性羟甲基化的新方法(I),以制备通式(II)的硝基苯基链烷醇。(II)在 上述式中,硝基分别在与甲基或羟烷基侧链相关的邻位或对位上与苯环连接,X表示氢,氟或烷基,烷氧基或硝基,n为1,2 或3.根据本发明的方法,在二甲基甲酰胺中和在强碱存在下,在高于室温的温度下,将起始物质用过量的甲醛羟甲基化。 反应在含有0.1〜1重量%水的二甲基甲酰胺中进行,通过适当地调节相对于起始化合物的甲醛和碱的温度和量,反应形成所需的最终产物 的通式(I)。 以这种方式,可以选择性地在工业规模上制备所需的最终产品。
    • 5. 发明授权
    • Process for the preparation of metal oxide catalysts and metal oxide
supported catalysts
    • 制备金属氧化物催化剂和金属氧化物载体催化剂的方法
    • US4021371A
    • 1977-05-03
    • US633171
    • 1975-11-19
    • Jozsef PetroTibor MatheAntal Tungler
    • Jozsef PetroTibor MatheAntal Tungler
    • B01J37/00B01J29/00B01J23/08
    • B01J37/00
    • The invention relates to a novel method of preparing catalysts containing the oxides and/or oxyhydrates of aluminum, silicon, magnesium or zinc either alone or in combination with each other, or catalysts containing a metal or a metal oxide as active component and an above-identified oxide and/or oxyhydrate or a mixture thereof as support. According to the invention catalysts with excellent activities can be prepared with a simple and economic operation.One proceeds, in accordance with the invention, as follows: powdered metallic aluminum, silicon, magnesium or zinc or a fused mixture thereof, or, when a supported catalyst is to be prepared, a fused mixture also containing one or more catalytically active metals, is admixed with an alkali metal hydroxide or carbonate or an alkaline earth metal hydroxide, said alkaline agent being used in an amount of 0.01 to 2 times the stoichiometric amount with respect to the aluminum, silicon, magnesium and/or zinc component, this mixture is wetted with water, stirred in solid phase, while the evaporated water is supplemented continuously, the resulting crude product is suspended in water, and the suspension is neutralized and/or washed until neutral.
    • 本发明涉及一种制备含有单独或彼此组合的铝,硅,镁或锌的氧化物和/或氧化合物的催化剂的新方法,或含有金属或金属氧化物作为活性组分的催化剂, 鉴定的氧化物和/或氧化水合物或其混合物作为载体。 根据本发明,具有优异活性的催化剂可以用简单经济的操作制备。