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    • 12. 发明授权
    • Process for producing laurolactam
    • 生产月桂内酰胺的方法
    • US08163899B2
    • 2012-04-24
    • US12526494
    • 2008-02-08
    • Kazuaki IshiharaJunichi KugimotoJoji Kawai
    • Kazuaki IshiharaJunichi KugimotoJoji Kawai
    • C07D201/04
    • C07D201/04C07D225/02Y02P20/582
    • Disclosed is a method for producing laurolactam from cyclododecanone and hydroxylamine in a simple process and with high efficiency. The method comprises the following steps (a) to (e): (a) reacting cyclododecanone with hydroxylamine in an aqueous solution in the presence of an excess amount of cyclododecanone or a solvent to produce cyclododecanone oxime; (b) separating the reaction mixture obtained after the oxime-forming step into an oil and an aqueous phases and collecting a solution of cyclododecanone oxime of the oil phase as; (c) removing dissolved water from the solution of cyclododecanone oxime which is collected as an oily phase in the oil/aqueous phase separation step; (d) producing laurolactam from cyclododecanone oxime by rearrangement reaction using an aromatic-ring containing compound as a rearrangement catalyst; and (e) separating the produced laurolactam from the reaction mixture after the rearrangement step and purifying the laurolactam.
    • 公开了一种以简单的工艺和高效率从环十二酮和羟胺制备月桂内酰胺的方法。 该方法包括以下步骤(a)至(e):(a)在过量的环十二烷酮或溶剂的存在下,使环十二酮与羟胺在水溶液中反应,生成环十二酮肟; (b)将在肟形成步骤后获得的反应混合物分离成油和水相,并收集油相的环十二酮肟溶液; (c)从在油/水相分离步骤中以油相收集的环十二酮肟溶液中除去溶解的水; (d)使用含芳环的化合物作为重排催化剂,通过重排反应从环十二酮肟生产月桂内酰胺; 和(e)在重排步骤之后将所生产的月桂内酰胺与反应混合物分离并纯化十二内酰胺。
    • 16. 发明授权
    • Running speed detector
    • 运行速度检测器
    • US4667297A
    • 1987-05-19
    • US683583
    • 1984-12-19
    • Joji Kawai
    • Joji Kawai
    • G01P3/489G01P3/42G01P3/48G06F15/20G06G7/00
    • G01P3/489
    • The present invention relates to a running speed detector comprising:a pulse encoder which generates pulses of a frequency proportional to the running speed of a rotary member;pulse period counting device for counting the periods of pulses having said frequency relying upon clock signals;memory for storing ounted values of periods counted by said pulse period counting means; andand a calculating device which receives pulses having said frequency, which calculates the sum of n latest counted values that have been counted already after the arrival of each of said pulses or after the arrival of a predetermined number of pulses, and which calculates the running speed that varies in proportion to a ratio of the number n of counted values of periods to said sum of counted values of periods.
    • 运行速度检测器技术领域本发明涉及一种运行速度检测器,包括:脉冲编码器,其生成与旋转部件的运行速度成比例的频率的脉冲; 脉冲周期计数装置,用于根据时钟信号计数具有所述频率的脉冲的周期; 用于存储由所述脉冲周期计数装置计数的周期值的存储器; 以及计算装置,其接收具有所述频率的脉冲,其计算在每个所述脉冲到达之后或在预定脉冲数到达之后已经计数的n个最近计数值的和,并且计算运行 速度与周期的计数值的数量n与周期的计数值的总和的比率成比例地变化。