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    • 1. 发明公开
    • PROCESS FOR SEPARATING VINYL ESTERS FROM A GAS STREAM COMPRISING ETHYLENE AND VINYL ESTERS
    • VERFAHREN ZUM TRENNEN VON VINYLESTERN AUS EINEM GASSTROM MIT ETHYLEN- UND VINYLESTERN
    • EP2935366A1
    • 2015-10-28
    • EP13818709.1
    • 2013-12-16
    • Basell Polyolefine GmbH
    • NEUMANN, ErichWOLF, ChristophLITTMANN, Dieter
    • C08F210/02C08F2/00C07C67/54
    • C07C67/52C08F210/02Y02P20/582C08F2/00C08F218/08C07C69/15
    • Process for separating esters of vinyl alcohol from a gas stream comprising from 70 to 99.5% by weight of ethylene and from 0.5 to 30% by weight of esters of vinyl alcohol being at a pressure in the range of from 0.5 MPa to 10 MPa and a temperature in the range of from 5°C to 50°C comprising the steps of a) cooling the gas stream in a first heat exchanger by means of a cooling medium to a temperature of from -5°C to 40°C; b) withdrawing the not condensed part of the gas stream from the first heat exchanger and transferring it to a second heat exchanger; c) cooling the gas stream in the second heat exchanger to a temperature of from -20°C to 5°C; d) withdrawing the not condensed part of the gas stream from the second heat exchanger, reducing the pressure of the gas stream to from 0.5 MPa to 3 MPa and transferring it to a separation vessel; e) withdrawing the not condensed part of the gas stream from the separation vessel and transferring it as cooling medium to the second heat exchanger; and f) withdrawing the cooling medium as ethylene gas stream with a reduced content of esters of vinyl alcohol from the second heat exchanger, and process for copolymerizing ethylene and esters of vinyl alcohol in the presence of free-radical polymerization initiators at pressures in the range of from 110 MPa to 500 MPa and temperatures in the range of from 100°C to 350°C in a continuously operated polymerization apparatus comprising such a process for separating esters of vinyl alcohol from a gas stream comprising from 70 to 99.5% by weight of ethylene and from 0.5 to 30% by weight of esters of vinyl alcohol.
    • 从乙烯醇的70〜99.5重量%的乙烯和0.5〜30重量%的乙烯醇的酯的压力为0.5MPa〜10MPa的范围内分离乙烯醇的酯的方法, 包括以下步骤:a)通过冷却介质将第一热交换器中的气流冷却至-5℃至40℃的温度; b)将来自第一热交换器的气流的未冷凝部分排出并将其转移到第二热交换器; c)将第二热交换器中的气流冷却至-20℃至5℃的温度; d)从第二热交换器排出气流的未冷凝部分,将气流的压力降低至0.5MPa至3MPa并将其转移至分离容器; e)从分离容器中取出气流的未冷凝部分并将其作为冷却介质转移到第二热交换器; 以及f)将来自第二热交换器的乙烯醇酯含量降低的乙烯气流作为乙烯气流排出,以及在自由基聚合引发剂存在下在乙烯醇和乙烯醇酯的存在下共聚乙烯醇的方法 在连续操作的聚合装置中,从110MPa至500MPa的温度范围为100℃至350℃,该聚合装置包括将乙烯醇的酯从气流中分离的方法,该气流包含70至99.5重量% 乙烯和0.5至30重量%的乙烯醇的酯。