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公开(公告)号:US4206191A
公开(公告)日:1980-06-03
申请号:US970531
申请日:1978-12-18
IPC分类号: C01B21/092 , C01D15/00
CPC分类号: C01B21/0926 , C01B3/08 , Y02E60/36
摘要: A low temperature method of preparing finely divided lithium amide. A mixture is first formed of bulk pieces of lithium metal with a catalyst such as active metallic cobalt in an inert liquid aromatic hydrocarbon, such as toluene, at about 0.degree. C. to about -60.degree. C. Anhydrous liquid ammonia is then added, aided by stirring, the lithium metal dissolving, two immiscible phases forming, one a so-called lithium-ammonia bronze solution being the top phase, and the toluene being the bottom phase. The formation of the lithium amide is then effected by raising the temperature under conditions of stirring, hydrogen and excess ammonia being liberated and the lithium amide, generally light grey in color, is formed which separates out in a very finely divided solid state, as a slurry in the toluene, and is recovered.
摘要翻译: 制备细分散的氨基化锂的低温方法。 混合物首先在大约0℃至大约-60℃的惰性液体芳烃(如甲苯)中由大量锂金属与催化剂如活性金属钴形成,然后加入无水液氨, 通过搅拌辅助,锂金属溶解,形成两个不混溶相,一个是所谓的顶级相的氨 - 氨青铜溶液,甲苯是底相。 然后通过在搅拌条件下升高温度,释放氢气和过量的氨来实现氨基化锂的形成,并且形成通常为浅灰色的氨基化锂,其以非常精细分散的固体状态分离出来,作为 在甲苯中淤浆,并回收。
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公开(公告)号:US4049732A
公开(公告)日:1977-09-20
申请号:US725640
申请日:1976-09-22
CPC分类号: C08F2/38 , Y10S585/922 , Y10S585/926 , Y10S585/931
摘要: Continuous process and apparatus for the preparation of normally liquid telomers derived from the reaction of a liquid telogen, such as toluene, with a polymerizable monomeric taxogen in gaseous form, such as 1,3-butadiene monomer, in the presence of an organometal telomerization initiator, such as a mixture or complex of n-butyllithium and potassium t-butoxide, wherein a controlled stream of the gaseous taxogen is continuously passed through fine apertures, as in a screen, into the liquid telogen containing said initiator disposed in a reaction zone in a reaction chamber, whereby to produce the normally liquid telomer, and, thereafter said telomer is continuously passed through a conduit into an additional reaction zone or zones and reacted in similar manner with additional gaseous taxogen until the desired concentration of liquid telomer is produced. The process is most desirably carried out in a controlled manner to prevent any undesirable excess of the taxogen from accumulating during the chain transfer step of the telomerization process. The process also results in the production of novel liquid telomers or liquid telomers having novel and advantageous properties in relation to otherwise generally similar liquid telomers heretofore known to the art.
摘要翻译: 在有机金属调聚引发剂存在下,制备源自液体循环调节剂如甲苯的液体调节剂与气态形式的可聚合单体发酵剂如1,3-丁二烯单体的连续方法和装置 ,例如正丁基锂和叔丁醇钾的混合物或络合物,其中将气态发酵剂的受控流连续地通过如筛网中的细孔,进入包含设置在反应区中的所述引发剂的液体前体 反应室,由此产生正常液体的调聚物,此后,所述调聚物连续地通过导管进入另外的反应区或区域,并以类似的方式与额外的气态紫杉醇反应,直到产生所需浓度的液体调聚物。 该方法最希望以受控的方式进行,以防止在调聚过程的链转移步骤过程中不必要的过量的发酵剂积累。 该方法还导致新型液体调节剂或液体调聚物的生产,其具有与本领域迄今为止已知的其它通用类似的液体调节剂相关的新型和有利的性质。
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