双金属中心双峰聚乙烯催化剂研究进展

2017年2月 CIESC Journal ·485· February 2017第68卷 第2期 化 工 学 报 V ol.68 No.2

DOI :10.11949/j.issn.0438-1157.20161172

双金属中心双峰聚乙烯催化剂研究进展

金玉龙,赵柠,程瑞华,刘柏平

(化学工程联合国家重点实验室,华东理工大学化工学院,上海 200237)

摘要:双峰聚乙烯因兼具优良的加工性能和优异的力学性能,被广泛应用于PE100、PE100RC 等高等级管材的生

产,其在聚乙烯市场中的地位越来越重要。目前工业上基本采用双釜串联工艺生产双峰聚乙烯,该工艺设备投资

及能耗较高,且均被国外公司垄断。相比之下,单釜双峰工艺因采用双金属中心催化剂在单一反应器中生产双峰

聚乙烯,其设备投资和操作费用更低,且更加绿色环保,因而成为近年来国内外研究的热点。综述了本课题组近

期基于铬系催化剂开发的新型双金属中心双峰聚乙烯催化剂,同时对其他双金属中心聚乙烯催化剂进行了介绍,

并对该领域的未来发展进行了展望。

关键词:催化剂;反应工程;聚合物;双金属中心催化剂;双峰聚乙烯

中图分类号:TQ 322.3 文献标志码:A

文章编号:0438—1157(2017)02—0485—11

Research progress of bimetallic catalysts for bimodal polyethylene synthesis

JIN Yulong, ZHAO Ning, CHENG Ruihua, LIU Boping

(State Key Laboratory of Chemical Engineering , School of Chemical Engineering , East China University of Science and Technology ,

Shanghai 200237, China )

Abstract : Bimodal polyethylene are widely used to produce high performance pipes, such as PE100 and PE100RC, and shows increasing importance in polyethylene market because of their excellent mechanical and processing properties. Nowadays, commercialized bimodal polyethylene is synthesized primarily in tandem-reactor process, which needs high energy consumption and capital investment in equipment, beside, the technology is under monopoly of foreign companies. By contrast, bimodal polyethylene synthesis using bimetallic catalyst in single reactor process is becoming research hotspot in domestic and abroad, because this process is more environment friendly and needs much lower cost in equipment investment and operation. Recent work in this group on Cr-based bimetallic catalysts is reviewed. Development on other bimetallic catalysts is also introduced and future trend is prospected.

Key words : catalyst; reaction engineering; polymer; bimetallic catalysts; bimodal polyethylene

引 言 尽管全球聚乙烯产量巨大,在2015年已达到

8850万吨,但是受全球经济不景气的影响,聚乙烯

产量的年均增长率正经历一个缓慢下降的过程,已

从1980~2000年的5.5%下降到2000~2015年的3.9%。同时,全球聚乙烯市场的竞争加剧,中东国

家以其低廉的原料优势正占据中低端聚乙烯市场,欧美日等国石化企业则加速开发聚乙烯高档料和专用料,其中分子量分布曲线呈现两个峰值的双峰聚 2016-08-22收到初稿,2016-10-20收到修改稿。

联系人:刘柏平。第一作者:金玉龙(1988—),男,博士研究生。基金项目:国家自然科学基金项目(21644011,21274040)。 Received date :2016-08-22. Corresponding author : Prof. LIU Boping, boping@https://www.360docs.net/doc/7b16338762.html, Foundation item : supported by the National Natural Science Foundation

of China (21644011, 21274040).

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