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
    • 2. 发明授权
    • Continuous production of organic phosphines
    • 连续生产有机膦
    • US4163760A
    • 1979-08-07
    • US872250
    • 1978-01-25
    • Georg ElsnerGero HeymerHans-Werner Stephan
    • Georg ElsnerGero HeymerHans-Werner Stephan
    • C07F9/50C07F9/6568C07F9/54
    • C07F9/5059C07F9/65683
    • Organic phosphines are produced by reacting an alkylene, cycloalkylene or aralkylene in the presence of a free radical-yielding catalyst. More specifically, a pressure reactor, which is provided in its interior with mixing elements, kept free from oxygen, and subdivided so as to comprise an upper cooling zone and a lower reaction zone, is continuously supplied from above with (a) a solution of the alkylene, cycloalkylene or aralkylene and the catalyst in an inert solvent, and (b) a stoichiometric excess of hydrogen phosphide, the said (a) and (b) reactants being supplied jointly with but separately from one another; the (a) and (b) reactants are mixed in the upper cooling zone of the reactor at about 0.degree. to 35.degree. C. and under a PH.sub.3 -pressure of about 80 to 300 bars; the resulting mixture, which travels downwardly in the reactor, is reacted in the lower reaction zone at about 90.degree. to 190.degree. C., the reactants being allowed to remain in the reactor for a period of time about 13 to 15 times longer than the half life period of the catalyst; the reaction mixture is removed through the bottom portion of the reactor and subjected to distillation so as to separate the organic phosphines.
    • 有机膦通过在产生自由基的催化剂存在下使亚烷基,亚环烷基或亚芳烷基反应来制备。 更具体地,在其内部设置有保持无氧的并且被分为包括上部冷却区和下部反应区的混合元件的压力反应器从上方连续地供给(a) 所述(a)和(b)反应物是由彼此共同供应的;(b)化学计量过量的磷酸氢盐,所述(a)和(b) (a)和(b)反应物在反应器的上部冷却区中在约0℃至35℃下混合,并在约80至300巴的PH3压力下混合; 在反应器中向下移动的所得混合物在下部反应区中在约90℃至190℃下反应,使反应物在反应器中保留约13至15倍的时间 催化剂的半衰期; 将反应混合物通过反应器的底部除去并进行蒸馏以分离有机膦。
    • 7. 发明授权
    • Aluminum nitride powder and a process for the preparation thereof
    • 氮化铝粉末及其制备方法
    • US4923691A
    • 1990-05-08
    • US364013
    • 1989-06-09
    • Dieter PetersGero HeymerChristian May
    • Dieter PetersGero HeymerChristian May
    • C01B21/072
    • C01B21/072C01P2002/60C01P2004/62C01P2006/12C01P2006/60
    • An aluminum nitride powder has a crystallite size of 40 to 150 nm, measured by powder diffractometry and evaluated by the method of Scherrer, a primary particle size of 0.1 to 0.5 .mu.m, a specific surface according to BET of 5 to 50 m.sup.2 /g and a degree of whiteness of more than 91%, measured using light of a 400 to 700 nm wavelength against barium sulfate analytical reagent as standard of whitness.To prepare this aluminum nitride powder, metallic aluminum and monoamminealuminum chloride [AlCl.sub.3 (NH.sub.3)] are first molten together in an inert gas atmosphere at temperatures above 125.degree. C. and allowed to react with one another with evolution of hydrogen. 8 to 20 g of ammonia are then introduced per hour per mol of monoamminealuminum chloride into the aluminum-containing monoamminealuminum chloride melt at temperatures between 250.degree. and 400.degree. C., aluminum nitride being precipitated as a solid until the conversion of the aluminum is complete. The temperature of the melt is finally raised to more than 400.degree. C.
    • 氮化铝粉末的微晶尺寸为40〜150nm,用粉末衍射法测定,用Scherrer法评价,一次粒径为0.1〜0.5μm,BET比表面积为5〜50m 2 / g 白度为91%以上,采用400〜700nm波长的光作为白度标准测定硫酸钡分析试剂。 为了制备这种氮化铝粉末,首先在惰性气体气氛中,在高于125℃的温度下将金属铝和一氯化铝[AlCl 3(NH 3)]熔融在一起,并使其彼此发生氢气反应。 然后在250-400℃的温度下将8至20g的氨每小时每摩尔氯化单铝酸铵引入含铝单胺氯化铝熔体中,将氮化铝作为固体沉淀直到铝的转化完全 。 熔体的温度最终升至400℃以上。