公开(公告)号：US06569962B1

公开(公告)日：2003-05-27

申请号：US09719602

申请日：2001-02-13

申请人： Werner Zschoch ,  Juan M. Mezquita ,  Harald Beer ,  Gerd Lohse ,  Otto Berbee

发明人： Werner Zschoch ,  Juan M. Mezquita ,  Harald Beer ,  Gerd Lohse ,  Otto Berbee

IPC分类号： C08F238

CPC分类号： C08F10/02 ,  C08F110/02 ,  C08F4/28 ,  C08F2/001 ,  C08F2/38 ,  C08F4/34 ,  C08F2500/12 ,  C08F2500/17

摘要： The invention pertains to a method for producing ethylene homopolymerizates and ethylene copolymerizates exhibiting a lower mass density of up to 0.930 g/cm3 and a melt index ranging from 0.15 to 25 g/10 min (2.16 kg; 463 K). Said polymerizates exhibit an improved processing stability and improved availability in the installation at pressures greater than 1000 bar and at temperatures of up to 603 K. The polymerizates are produced in tubular reactors in the presence of radical-forming initiators, oxygen thereunder and chain transfer agents, of which at least one comprises an aldehydic structure. According to the inventive method, chemokinetic characteristics of the reactive feed materials (thermal half-life periods, concentrations, dosing quantities) are coupled with fluidically relevant characteristics of the tubular reactor (flow rate) while taking the target product quality (melt index, flow figure) into consideration. This coupling is carried out such that the interfering secondary reactions, especially polar-inductive substitution effects, which can lead to the formation and the enrichment of organic hydroperoxides are reduced to a minimum and, as a result, extraordinarily stable processing conditions can be obtained.

摘要翻译： 本发明涉及生产乙烯均聚物和乙烯共聚物的方法，其表现出最高0.930g / cm 3的较低质量密度和0.15-25g / 10min（2.16kg; 463K）的熔体指数。 所述聚合物在高于1000巴的压力和高达603K的温度下表现出改进的加工稳定性和改进的可用性。聚合物在管状反应器中在自由基形成引发剂，其下的链和链转移剂 ，其中至少一个包含醛结构。 根据本发明的方法，反应性进料的趋化因子特征（热半衰期，浓度，给药量）与管状反应器的流体相关特征（流速）相结合，同时获得目标产物质量（熔体指数，流量 图）考虑。 进行这种耦合使得能够将导致有机氢过氧化物的形成和富集的干扰性二次反应，特别是极性诱发取代效应降低到最小，结果可以获得非常稳定的加工条件。