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5 条记录 (耗时 0.019 秒)

    Process for preparing a sulfonated dispersant from petroleum asphalt fractions
    2.
    发明授权
    Process for preparing a sulfonated dispersant from petroleum asphalt fractions 失效
    从石油沥青馏分制备磺化分散剂的方法

    公开(公告)号：US5322556A

    公开(公告)日：1994-06-21

    申请号：US28728

    申请日：1993-03-08

    申请人： Aldo Prevedello ,  Edoardo Platone ,  Elio Donati

    发明人： Aldo Prevedello ,  Edoardo Platone ,  Elio Donati

    IPC分类号： C07C303/32 ,  B01F17/00 ,  B01F17/08 ,  C07C303/06 ,  C07C309/62 ,  C10L1/32 ,  C10L10/18 ,  C09D195/00 ,  C09C1/28 ,  C09C1/44 ,  C09D1/08

    CPC分类号： B01F17/0057 ,  C07C303/06 ,  Y10S516/03 ,  Y10S516/909

    摘要： A process for preparing a sulfonated dispersant from a petroleum asphalt fraction, comprising:establishing contact between the asphalt fraction dissolved in an inert solvent and liquid or gaseous sulfur trioxide at a temperature equal to or less than 60.degree. C., to obtain a sulfonated asphalt fraction;salifying the sulfonated asphalt fraction thus obtained by contact with an aqueous solution of a hydroxide of an alkaline metal, alkaline earth metal or ammonium and recovering the sulfonated salt from the reaction mixture.This process provides water-soluble sulfonated salts of petroleum asphalt fractions, which can be used as fluidifying and stabilizing agents for aqueous dispersions of solids, such as aqueous dispersions of coal or cement.

    摘要翻译： 一种从石油沥青馏分制备磺化分散剂的方法，包括：在等于或低于60℃的温度下，将溶解在惰性溶剂中的沥青级分与液态或气态三氧化硫之间建立接触，得到磺化沥青 分数; 通过与碱金属，碱土金属或铵的氢氧化物的水溶液接触而使由此获得的磺化沥青馏分成盐，并从反应混合物回收磺化盐。 该方法提供石油沥青馏分的水溶性磺化盐，其可用作固体的水分散体的流化和稳定剂，例如煤或水泥的水分散体。

    Concrete composition containing a superfluidifying additive
    3.
    发明授权
    Concrete composition containing a superfluidifying additive 失效
    含有超流化添加剂的混凝土组合物

    公开(公告)号：US5221344A

    公开(公告)日：1993-06-22

    申请号：US877835

    申请日：1992-05-01

    申请人： Aldo Prevedello ,  Edoardo Platone ,  Dario Ercolani ,  Elio Donati

    发明人： Aldo Prevedello ,  Edoardo Platone ,  Dario Ercolani ,  Elio Donati

    IPC分类号： C04B24/20 ,  C07G99/00

    CPC分类号： C07G17/002 ,  C04B24/20

    摘要： A concrete composition contains hydraulic cement, inerts, water and superfluidifying additive obtained by salifying, in the form of an alkaline metal, alkaline earth metal or ammonium salt, the sulphonated and oxidised products resulting from the reaction between sulphur trioxide and fuel oil deriving from steam cracking. This concrete composition has improved workability characteristics and enables concretes to be obtained generally possessing greater strength and durability.

    摘要翻译： 混凝土组合物包含水硬性水泥，惰性物质，水和超流化添加剂，其通过以碱金属，碱土金属或铵盐的形式盐化，由三氧化硫和源自蒸汽的燃料油之间的反应产生的磺化和氧化产物 开裂 这种混凝土组合物具有改进的可加工性特征，并且能够获得通常具有更大强度和耐久性的混凝土。

    Method for preparing a high-concentration solids suspension in water
    5.
    发明授权
    Method for preparing a high-concentration solids suspension in water 失效
    在水中制备高浓度固体悬浮液的方法

    公开(公告)号：US4983187A

    公开(公告)日：1991-01-08

    申请号：US293092

    申请日：1989-01-03

    申请人： Vincenzo Lagana ,  Dario Ercolani ,  Elio Donati

    发明人： Vincenzo Lagana ,  Dario Ercolani ,  Elio Donati

    IPC分类号： F23K1/02 ,  C10L1/32

    CPC分类号： C10L1/326

    摘要： A method is described for preparing a high-concentration solids suspension, in particular coal or petroleum coke, which can be transported by pipe and be burnt with low emission of harmful substances, comprising crushing the solid to be suspended to a maximum particle size of 6 mm and then grinding it in the presence of additives in aqueous solution to a maximum solid particle size of 300 .mu.m, the method being characterized by adding, either before the crushing or immediately before the grinding, a desulphurizer chosen from CaCo.sub.3, MgCO.sub.3 and dolomite, either alone or in mixture, in a molar ratio to the sulphur contained in the solid of between 1.5 and 3, and adding immediately before or during grinding a desulphurizer also possessing stabilizing and anticorrosive properties and chosen from MgO, Mg(OH).sub.2, CaO and Ca(OH).sub.2, either alone or in mixture, in a quantity of between 0.04 and 0.4% by weight of the final suspension.