三组分共聚高性能聚乙烯的质量预测模型  

Quality Predicting Models for Ethylene Terpolymerization to High-Performance Polyethylene

作　　者：徐怡[1] 王芳[1] 王靖岱[1] 阳永荣[1] 王海平[2] 石志俭[2] 

机构地区：[1]浙江大学化学工程与生物工程学系 [2]中国石油化工股份有限公司齐鲁分公司,山东淄博255414

出　　处：《石油化工》2008年第3期247-252,共6页Petrochemical Technology

基　　金：国家自然科学基金项目(20676114);国家自然科学基金重大项目资助(20490205);国家“863”高技术研究发展计划资助项目(G20070040);中国石油化工股份有限公司资助项目(404040)

摘　　要：以Unipol聚乙烯气相流化床为研究对象,基于铬系催化剂多活性中心聚合机理,建立了乙烯-1-丁烯-1-己烯三组分共聚制备高性能聚乙烯的熔体流动指数和密度的预测模型,并采用生产过程中的动态响应数据进行了模型参数的优化求解。实验结果表明,熔体流动指数和密度的计算值与测量值的最大相对误差分别为4.37%和0.86%,精度满足工业要求,可结合先进控制策略用于聚乙烯质量的在线测控。To meet the need of suitable on-line polymer property measurements in polymerization reactor, theoretically-based models were developed to predict melt index and density of high- performance ethylene-1-butene-1-hexene terpolymer prepared in a Unipol gas-phase fluidized bed reactor on chromium catalyst with multiple active sites. Parameters of these models were estimated from on-line temperature and gas composition measurements, together with laboratory measurements from an industrial pilot reactor and by using SQP algorithm. With the aid of established models both melt index and density can be predicted with mean relative errors 4.37% and 0.86%, respectively. The models can be applied to one-line polyethylene quality measurements and control of systems combined with advanced control strategies.

关 键 词：乙烯1-丁烯 1-己烯 三组分共聚 高性能聚乙烯 熔体流动指数 密度 质量模型 

分 类 号：TQ021.8[化学工程]