BMC-200催化剂生产聚乙烯研究
2020-08-23王勇



摘 要:由于近些年来全国乙烯项目陆续投产和产能释放,造成全国低端聚乙烯产品市场竞争日益激烈,UNIPOL工艺聚乙烯装置生产的DJM1820系列常规产品价格已很难形成可观的盈利,为追求效益,开发生产高端产品势在必行,而用BMC-200双峰催化剂生产的PE-100管材无疑是高端产品中的一个较优选择。PE-100管材的生产操作与UCAT-J催化剂产品生产操作有较大区别,旨在研究BMC-200双峰催化剂生产操作,为实际生产提供理论依据。
关 键 词:聚乙烯;催化剂;反应;操作
中图分类号:TQ062 文献标识码: A 文章编号: 1671-0460(2020)07-1505-05
Study on Polyethylene Production With BMC-200 Catalyst
WANG Yong
(PetroChina Fushun Petrochemical Company, Fushun Liaoning 113004, China)
Abstract: Because the national ethylene projects start to product in recent years and the production capacity increases, the low grade polyethylene product market competition is increasingly fierce, the UNIPOL process PE production DJM1820 series normal product price has been difficult to form a considerable profit, in the pursuit of benefits, development and production of high grade products are imperative, and producing high grade product PE-100 pipe with bimodal BMC-200 catalyst is an undoubted choice. The production operation of PE-100 pipe is quite different from that of UCAT-J catalyst products. In this paper, the production operation of PE-100 pipe with BMC-200 bimodal catalyst was studied, which could provide theoretical basis for the actual production.
Key words: Polyethylene; Catalyst; Reaction; Operation
BMC-200催化劑基本依靠从专利商进口,所以本文并不关注催化剂的制备原理,但是我们对BMC-200催化剂以及与其配套的D3和Trim调整液的特性需要有一定了解,以便生产中的操作调整。
1 催化剂的基本特性及作用
1.1 BMC-200双峰催化剂
常规催化剂生产的树脂产品的分子量呈现正态分布,只有一个峰值,或通过多个反应器操作后才能生产出两个峰值的树脂产品,但是BMC-200双峰催化剂不同,仅通过单反应器反应就能够产生两个峰值的树脂产品,这主要是由于BMC-200双峰催化剂特殊构成决定的,它含有一种能产生高分子量聚乙烯的催化剂和一种能产生低分子量聚乙烯的催化剂,这两种催化剂通过附着在活性中心上从而具备活性[1-2]。
1.2 Trim调整液
Trim调整液与BMC-200催化剂混合后,会使产生低分子量聚乙烯的催化剂与活性中心附着的量增加,从而产生更多的低分子量聚乙烯分子,使低分子量聚乙烯分子与高分子量聚乙烯分子的比例改变,影响熔融指数FI。……
