会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 21. 发明授权
    • Composition for use in organolithium synthesis reactions
    • 用于有机锂合成反应的组合物
    • US5149889A
    • 1992-09-22
    • US605742
    • 1990-10-30
    • Jurgen DeberitzWilfried Weiss
    • Jurgen DeberitzWilfried Weiss
    • C07F1/02
    • C07F1/02
    • A process is disclosed for the preparation of tertiary alcohols, alpha-alkyl substituted nitriles, alkyl-substituted imines or tertiary amines by alkylation of a starting material that is a carbonyl compound or a nitrile followed by hydrolysis wherein the alkylation is carried out with the aid of a reaction system formed by suspending a mixture of:substantially 15 to 25% by weight of methyllithium or ethyllithium;substantially 35 to 45% by weight of an inorganic compound selected from the group which consists of at least one metal oxide selected from the group which consists of SiO.sub.2, Al.sub.2 O.sub.3, and CaO, and synthetic anhydrous aluminum silicate; andsubstantially 35 to 45% by weight of a paraffin oil or wax; in an organic solvent selected from the group which consists of:C.sub.5 to C.sub.10 saturated aliphatic hydrocarbons, C.sub.5 to C.sub.10 cycloaliphatic hydrocarbons, aromatic hydrocarbons selected from the group which consists of benzene, toluene, and xylene, and aliphatic or cycloaliphatic ethers selected from the group which consists of diisopropyl ether, di-n-butyl ether, tert-butylether, tetrahydrofuran and dioxane.
    • 公开了制备叔醇,α-烷基取代的腈,烷基取代的亚胺或叔胺的方法,该方法是通过羰基化合物或腈的原料烷基化,然后进行水解,其中烷基化是借助于 通过将基本上为15至25重量%的甲基锂或乙基锂的混合物悬浮而形成的反应体系; 基本上为35〜45重量%的选自由选自由SiO 2,Al 2 O 3和CaO组成的组中的至少一种金属氧化物组成的组的无机化合物和合成的无水硅酸铝; 和基本上35至45重量%的石蜡油或蜡; 在选自以下的有机溶剂中:C5至C10饱和脂族烃,C5至C10脂环族烃,选自苯,甲苯和二甲苯组成的组的芳族烃和选自以下的脂族或脂环族醚: 其由二异丙醚,二正丁基醚,叔丁基醚,四氢呋喃和二恶烷组成。
    • 28. 发明授权
    • Dissolved methyllithium-containing composition for use in synthesis
reactions
    • 用于合成反应使用溶解含甲基的组合物
    • US5677543A
    • 1997-10-14
    • US499547
    • 1995-07-07
    • Wilfried WeissPeter RittmeyerUte Emmel
    • Wilfried WeissPeter RittmeyerUte Emmel
    • C07F1/02C09K3/00
    • C07F1/02
    • Disclosed is a dissolved methyllithium-containing composition for use in synthesis reactions (synthesis composition) and processes of preparing the composition. In the sythesis composition the methyllithium is contained in a solvent of the general formula (I) ##STR1## wherein independently R.sup.1 and R.sup.2 are a hydrogen, methyl or ethyl residue and R.sup.3 and R.sup.4 are a methyl or ethyl residue. To prepare the methyllithium-containing synthesis composition of the invention lithium powder or granular lithium is dispersed in a solvent having the general formula I, methyl halide is added at a controlled rate, the reaction temperature is maintained in the range of from 0.degree. to 60.degree. C., and the resulting lithium halide is separated from the methyllithium solution.
    • 公开了用于在合成反应(合成组合物)以及制备所述组合物的过程中使用的溶解含甲基的组合物。 在合成组合物中,甲基锂包含在通式(I)的溶剂中(I),其中独立地R 1和R 2是氢,甲基或乙基残基,且R 3和R 4是甲基或乙基残基。 为了制备本发明的含甲基锂的合成组合物,将锂粉末或颗粒状锂分散在具有通式I的溶剂中,以受控的速率加入甲基卤,反应温度保持在0〜60℃ 并将所得卤化锂与甲基锂溶液分离。
    • 29. 发明授权
    • Twin-wire former for the production of a web of paper
    • 用于生产纸张的双线成型机
    • US5019214A
    • 1991-05-28
    • US451818
    • 1989-12-15
    • Albrecht MeineckeDieter EgelhofWilfried Weiss
    • Albrecht MeineckeDieter EgelhofWilfried Weiss
    • D21F9/00
    • D21F9/003
    • A twin-wire former for the production of a web of paper from a fiber suspension. An upper endless loop of wire belt having a lower horizontal run and a lower endless loop wire belt having an upper horizontal run. Guide rolls support the wire belts to define a twin-wire zone. The upstream inlet wedge of the twin-wire zone is disposed at the outlet from a head box. The initial part of the path of the twin-wire zone has a gradual curvature convexly with respect to the lower wire belt, and in that initial portion are positioned guide tables, suction boxes and dewatering elements. This curved initial part is followed by a forming roll within the loop of the upper wire belt. The twin-wires wrap an arcuate sector of the lower region of the forming roll. A support roll follows the forming roll. The support roll is upraised sufficiently to wrap the twin-wires around the bottom of the forming roll and over an arcuate sector at the top of the support roll. Following the support roll, the upper wire separates from the lower wire. In the continuing generally horizontal, slightly descending path of the lower wire with the web on it are disposed a plurality of suction boxes and a lower wire suction roll to define a final dewatering path after the twin-wire zone.
    • 一种用于从纤维悬浮液生产纸幅的双线成型机。 具有较低水平行程的电线带的上部无限循环和具有上部水平行程的下部无端环线缆带。 导辊支撑钢丝绳带以限定双线区域。 双线区域的上游入口楔设置在头箱的出口处。 双线区域的路径的初始部分相对于下部电缆带呈凸起的渐变曲线,并且在该初始部分中定位有引导台,抽吸箱和脱水元件。 该弯曲的初始部分之后是在上部线带的环内的成形辊。 双丝缠绕成形辊的下部区域的弓形部分。 支撑辊跟随成型辊。 支撑辊被充分地升高以将双网包裹在成形辊的底部周围并且在支撑辊的顶部的弓形部分上方。 在支撑辊之后,上部电线与下部电线分离。 在其上具有腹板的下部丝线的连续大致水平的稍微下降的路径中设置有多个抽吸盒和下部线抽吸辊,以在双网区域之后限定最终脱水路径。