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
    • 1. 发明授权
    • Continuous preparation of ethylene homopolymers or copolymers
    • 连续制备乙烯均聚物或共聚物
    • US07737229B2
    • 2010-06-15
    • US10577695
    • 2004-10-27
    • Andrei GonioukhGernot KöhlerTheo TeuberThomas Dröge
    • Andrei GonioukhGernot KöhlerTheo TeuberThomas Dröge
    • C08F2/00C08F10/14
    • C08F10/02C08F10/00C08F110/02C08F2/06C08F4/32C08F2/00C08F4/34C08F2/38C08F2500/12
    • The invention relates to a process for the continuous preparation of ethylene homopolymers or copolymers in the presence of free-radical polymerization initiators and, if desired, molecular weight regulators at from 120° C. to 350° C. and pressures in the range from 100 to 4000 bar, in which the polymer is separated from unpolymerized ethylene in a high-pressure stage at a pressure of from 100 to 500 bar and at least one low-pressure stage at a pressure of from 1 to 100 bar and the ethylene separated off in the high-pressure stage is separated from remaining monomeric, oligomeric and/or polymeric constituents and recirculated to the inlet of the tube reactor in a high-pressure circuit and the ethylene separated off in the low-pressure stage is separated from remaining monomeric, oligomeric and/or polymeric constituents and recirculated to the inlet of the tube reactor in a low-pressure circuit. The initiator is used as a solution in an isoparaffinic solvent having a boiling point of not more than 160° C. and the solvent is separated from the other monomeric, oligomeric and/or polymeric constituents in the low-pressure circuit. The solvent is then, if appropriate after being admixed with fresh solvent, reused for dissolving initiator.
    • 本发明涉及一种在自由基聚合引发剂存在下连续制备乙烯均聚物或共聚物的方法,如果需要,本发明涉及120℃至350℃的分子量调节剂,并且在100 至4000巴,其中聚合物在100至500巴的压力和至少一个压力为1至100巴的压力下的高压阶段中与未聚合的乙烯分离,乙烯分离 在高压阶段与剩余的单体,低聚物和/或聚合物组分分离,并在高压回路中再循环到管式反应器的入口,并将在低压级分离的乙烯与剩余的单体, 低聚物和/或聚合物组分,并在低压回路中再循环到管式反应器的入口。 引发剂用作沸点不超过160℃的异链烷烃溶剂中的溶液,并将溶剂与低压回路中的其它单体,低聚物和/或聚合物成分分离。 如果在与新鲜溶剂混合后适当,溶剂再次用于溶解引发剂。