Title:
POLYMERIZATION PROCESS OF IMPACT POLYPROPYLENE
Document Type and Number:
WIPO Patent Application WO/2019/090884
Kind Code:
A1
Abstract:
A method for preparing an impact polypropylene, comprising: (1) performing propylene prepolymerization of a liquid phase propylene with a polymerization catalyst, to be a feedstock slurry containing a propylene prepolymer, wherein the prepolymerization temperature is 40ºC-45ºC, the prepolymerization pressure is 3.2-3.9 MPaG, and the main catalyst is 0.02 weight %-0.05 weight % of the liquid phase propylene; (2) mixing the feedstock slurry, a recovered liquid phase propylene and hydrogen gas into a liquid phase polymeric raw material; and then successively carrying out a liquid phase homopolymerization of propylene and a gas phase homopolymerization of propylene, to obtain a product containing polypropylene; (3) separating the product containing polypropylene, and subjecting the separated polypropylene to a copolymerization reaction with ethylene and a second propylene to obtain an impact polypropylene. The present method reduces energy consumption per unit product, and propylene loss.
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Inventors:
LIU LIXIN (CN)
LI ZEMIN (CN)
ZHANG YI (CN)
LIU LIYAN (CN)
WU XIA (CN)
LI ZEMIN (CN)
ZHANG YI (CN)
LIU LIYAN (CN)
WU XIA (CN)
Application Number:
PCT/CN2017/115400
Publication Date:
May 16, 2019
Filing Date:
December 11, 2017
Export Citation:
Assignee:
BEIJING HUAFU ENG CO LTD (CN)
International Classes:
C08F110/06; C08F2/02; C08F2/34; C08F4/646; C08F6/28; C08F210/02; C08F210/06; C08F255/02; C08F285/00
Foreign References:
| CN106543330A | 2017-03-29 | |||
| CN102020733A | 2011-04-20 | |||
| CN102030841A | 2011-04-27 | |||
| CN106832583A | 2017-06-13 |
Attorney, Agent or Firm:
RUNPING&PARTNERS (CN)
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