工业流化床乙烯气相共聚合过程的研究 Ⅰ.产品分子量的稳态模拟

通过对Ｕｎｉｐｏｌ聚乙烯生产过程中影响聚合物分子量诸因素的分析，建立了包含乙烯分压和催化剂加料速率两个新变量的、用于表征聚合物分子量（ＭＩ）的稳态模型：ｌｎＭＩ＝Ａ０＋Ａ１／Ｔ＋Ａ２ｌｎ（Ａ３＋∑ｉｊＡｉｘｊ）利用工业装置上的操作数据对模型中诸参数进行估值。将该模型用于实际产品ＭＩ值的预测，计算值与分析结果的平均相对误差为４．６７％。表明该模型可以很好地模拟工业生产过程。

Study on Gas Phase Ethylene Copolymerization in Fluidized Bed Reactor

On the basis of the mechanism of ethylene copolymerization in a commercial polyethylene production process, a novel stationary model of polymer molecular weight(MI), taking into consideration of the two additional variables of partial ethylene pressure and catalyst feed rate, was established as follows: lnMI =A 0+A 1/T+A 2 ln (A 3+∑ijA i x j ),i=4, ,9;j=1, ,6 where, A 1～A 9 are constants, x 1～x 6 are operational variables The prediction results are satisfactorily consistent with the data from industrial plant