Production method of bimodal polyethylene

• Main Authors: ZHU GUANNAN, GAO BIYA, HE KUN, ZHANG BIN, LI YONG, XIANG HAIDING, CUI CHUNXIA, ZHU YANBO, ZHANG XIAN, LIU XINGBING, PAN JIONGBIN, LYU SHIJUN, NI QIONG
• Format: Patent
• Language: Chinese; English
• Published: 02.10.2018
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to a production method of bimodal polyethylene, and mainly solves the problems of narrow polyethylene molecular weight range, long technological process, large equipment investment and high operation cost in the prior art. The problems are well solved by adopting the production method of bimodal polyethylene, ethylene raw materials enter a first polymerization reaction kettleand are subjected to macromolecular polymerization reaction firstly under technological operation conditions of different hydrogen/ethylene volume ratios; then a part of a slurry discharge material of the first polymerization reaction kettle enters a second polymerization reaction kettle and is subjected to low molecular polymerization reaction; and finally, the other part of the slurry dischargematerial of the first polymerization reaction kettle is mixed with all slurry discharge material of the second polymerization reaction kettle to form the polyethylene product with bimodal molecular weight distribution; the pr