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
    • 5. 发明公开
    • POLYMERIZATION PROCESSES WITH FRESH ETHYLENE DISTRIBUTIONS FOR PREPARATION OF LOW DENSITY ETHYLENE-BASED POLYMERS
    • 用新鲜乙烯分布制备低密度乙烯基聚合物的聚合工艺
    • EP3243849A3
    • 2018-02-21
    • EP17175785.9
    • 2012-10-10
    • Dow Global Technologies Llc
    • ZSCHOCH, WernerBERBEE, Otto J.HOSMAN, Cornelis J.
    • C08F10/02C08F2/34
    • C08F110/02C08F10/02C08F2/00C08F2/38C08F2500/08C08F2500/11C08F2500/12C08F2500/26
    • The present invention relates to a high pressure polymerization process to form an ethylene-based polymer, the process comprising at least the following steps:
      feeding ethylene to a first reaction zone and to one or more subsequent reaction zones, and wherein for each subsequent reaction zone that receives fresh ethylene, the ratio, Rn (n = reaction zone number, n>1), of "mass fraction of fresh ethylene fed to the first reaction zone (RZ1)" to "mass fraction of fresh ethylene fed to the nth reaction zone (RZn)" is (Rn = RZl/RZn) greater than 1, or is from 0 to 0.30, and
      wherein the "total amount of ethylene fed to the polymerization process" derives from at least one fresh ethylene stream and at least one recycled ethylene stream, and wherein the at least one recycled ethylene stream comprises at least one chain transfer agent and/or comprises at greater than, or equal to, 1 weight %, based on total amount of components in recycled ethylene stream, of one or more non-ethylene components and/or CTA(s);
      wherein the inlet stream to each reaction zone comprises less than, or equal to, 5 weight ppm oxygen, based on the total weight of mass flows fed to the reaction zone; and wherein each CTA is independently selected from an olefin, an aldehyde, a ketone, an alcohol, a saturated hydrocarbon, an ether, a thiol, a phosphine, an amino, an amine, an amide, an ester, or an isocyanate.
    • 本发明涉及形成基于乙烯的聚合物的高压聚合方法,所述方法至少包括以下步骤:将乙烯加料至第一反应区和一个或多个后续反应区,并且其中对于每个后续反应区 接收新鲜乙烯时,“供给第一反应区的新鲜乙烯的质量分数(RZ1)”与供给第n个反应的新鲜乙烯的质量分数之比Rn(n =反应区数n> 1) (RZn)“是(Rn = RZl / RZn)大于1,或者是从0至0.30,并且其中”送入聚合过程的乙烯的总量“来自至少一种新鲜乙烯流和至少一种 再循环的乙烯流,并且其中所述至少一种再循环的乙烯流包含至少一种链转移剂和/或包含大于或等于1重量%,基于再循环的乙烯流中的组分的总量,一种或多种 更多的非乙烯成分 s和/或CTA; 其中基于进料到反应区的质量流的总重量,到每个反应区的进料流包含小于或等于5重量ppm的氧; 并且其中每个CTA独立地选自烯烃,醛,酮,醇,饱和烃,醚,硫醇,膦,氨基,胺,酰胺,酯或异氰酸酯。