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    • 5. 发明申请
    • PROCESS FOR MONITORING THE POLYMERIZATION OF ETHYLENE OR ETHYLENE AND COMONOMERS IN A TUBULAR-REACTOR AT HIGH-PRESSURES
    • 用于监测高压管状反应器中乙烯或乙烯和共聚物聚合的方法
    • US20130274424A1
    • 2013-10-17
    • US13995829
    • 2011-12-19
    • Sebastian WeiandWolfgang GsellaVictor KuhneChristian-Ulrich SchmidtTom Zimmermann
    • Sebastian WeiandWolfgang GsellaVictor KuhneChristian-Ulrich SchmidtTom Zimmermann
    • C08F10/02G01N7/00
    • C08F10/02C08F110/02C08F210/02C08F210/16C08F2400/02G01N7/00C08F210/06C08F220/14C08F2/00C08F2/001
    • Process for monitoring the polymerization of ethylene or ethylene and comonomers in the presence of free-radical polymerization initiator at pressures in the range of from 160 MPa to 350 MPa and temperatures in the range of from 100° C. to 350° C. in a tubular reactor with one or more reaction zones, which is equipped with cooling jackets for cooling the tubular reactor with a cooling medium, comprising the steps of a) measuring as process parameters the temperature profile and the pressure of the reaction medium and the flow and temperature profile of the cooling medium along the reactor, b) monitoring the feeds of ethylene, if present comonomer, free-radical polymerization initiator and chain-transfer agent to all reaction zones, c) calculating, based on the measured process parameters and on a model for the polymerization process, concentrations for free-radical polymerization initiator, chain-transfer agent, ethylene and, if present, comonomers at at least so many positions along the reactor, that at least one calculation is carried out all 10 s for a volume unit flowing through the reactor, d) calculating, based on the measured process parameters and the calculated concentrations, the cooling power, the generation of heat, and the concentration of radicals, e) calculating, based on the calculated data of the cooling power, of the generation of heat, and of the concentration of radicals, the potential of a thermal runaway of the reaction mixture at the positions along the reactor which have the highest temperatures, and f) outputting an alarm signal if the calculated value for the potential of a thermal runaway exceeds a predefined value and process for polymerizing ethylene or ethylene and comonomers comprising such a monitoring process.
    • 在自由基聚合引发剂的存在下,在160MPa至350MPa的压力和100℃至350℃的温度范围内,监测乙烯或乙烯和共聚单体的聚合反应的方法, 具有一个或多个反应区的管式反应器,其配备有用于用冷却介质冷却管式反应器的冷却夹套,包括以下步骤:a)测量作为工艺参数的温度分布和反应介质的压力以及流动和温度 b)监测乙烯(如果存在的共聚单体,自由基聚合引发剂和链转移剂)进料到所有反应区的进料,c)根据测量的工艺参数和模型计算 对于聚合过程,自由基聚合引发剂,链转移剂,乙烯和(如果存在)共聚单体在至少这么多位置的浓度 反应器,对于流过反应堆的体积单位进行至少一次计算10秒,d)基于测量的过程参数和计算的浓度,计算冷却功率,产生热量和浓度 的自由基,e)基于计算的冷却功率的数据,计算出热的产生和自由基的浓度,反应混合物在沿着反应器的位置处的热失控的可能性为最高 温度,以及f)如果热失控潜力的计算值超过预定值,则输出报警信号,并且包括这样的监测过程的聚合乙烯或乙烯和共聚单体的方法。