Preparation of high impact polypropylene with high ethylene content by gas phase process

DA Wenzhong; XIAO Zhixian; XU Hongbin; TU Yuxia; MEI Li; YAO Zhen; CAO Kun

doi:10.11949/j.issn.0438-1157.20151354

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Preparation of high impact polypropylene with high ethylene content by gas phase process

更新时间：2025-12-10

- Preparation of high impact polypropylene with high ethylene content by gas phase process
- CIESC Journal Issue 2, Pages: 667-671(2016)
- 作者机构：
  
  1. 中国石化扬子石油化工有限公司南京研究院,江苏,南京,210047
  2. 浙江大学化学工程与生物工程学院, 化学工程联合国家重点实验室,浙江,杭州,310027
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20151354
  CLC： Q033
- Online First：05 February 2016，
  
  Published：05 February 2016
- 稿件说明：
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DA Wenzhong, XIAO Zhixian, XU Hongbin, et al. Preparation of high impact polypropylene with high ethylene content by gas phase process[J]. CIESC Journal, 2016, (2): 667-671.
DOI：

DA Wenzhong, XIAO Zhixian, XU Hongbin, et al. Preparation of high impact polypropylene with high ethylene content by gas phase process[J]. CIESC Journal, 2016, (2): 667-671. DOI： 10.11949/j.issn.0438-1157.20151354.

摘要

反应器内合金化技术生产高抗冲聚丙烯(hiPP)过程中

目前工业上普遍采用加入低纯氮(LPN)的方式阻止聚丙烯颗粒表面生成乙丙橡胶的防粘策略

限制了乙烯含量的提高

使得其抗冲性能受到一定的制约。提出了一种在共聚气相釜中原位添加极少量(<0.1%)超细粉体的方法

通过局载化于聚丙烯颗粒表面

从而起到替代低纯氮的作用

并能通过物理阻隔的方式进一步防止颗粒间发黏聚并

成功将其运用于Hypol 工艺

制得高乙烯含量(>20%)且流动性良好的hiPP。同时

将产物与传统低纯氮体系的进行比较

其常温抗冲性能由36.44 kJ·m-2升至60.56 kJ·m-2

低温抗冲性能由14.78 kJ·m-2 升至35.12 kJ·m-2

体现出其优异的常温和低温抗冲性能。

Abstract

In the production of high impact polypropylene (hiPP) by in-reactor processes

the ethylene content of hiPP was limited at a low level for the lack of a suitable antisticking method and that by now a deficient antisticking method with low purity nitrogen (LPN) was commonly adopted. A new antisticking method by in-situ adding tiny (<0.1%) superfines was adopted in Hypol process to produce hiPP with high ethylene content (>20%) and good flowability

showing the possibility to take the place of LPN method. Moreover

the comparison of the product with hiPP prepared by LPN method showed that the anti-impact performance rose from 36.44 kJ·m-2 to 60.56 kJ·m-2 at 23℃ and from 14.78 kJ·m-2 to 35.12 kJ·m-2 at -20℃

respectively. It was found that hiPP with high ethylene content presented excellent anti-impact performance at both 23℃ and -20℃.

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Related Author

CHEN Wei

WU Yan

YAO Zhen

CAO Kun

DA Wenzhong

TU Yuxia

XU Hongbin

MEI Li

Related Institution

State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University

Nanjing Research Institute of SINOPEC Yangzi Petrochemical Co. Ltd.

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