Preparation method of slurry polyethylene

• Main Authors: LI YINUO, HE KUN, LIU XIAOXIAO, ZHANG BIN, SHI SIHUI, LYU SHIJUN, BAI MEI, CUI CHUNXIA, CHEN YONGQIANG
• Format: Patent
• Language: Chinese; English
• Published: 24.03.2023
• 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 discloses a preparation method for slurry polyethylene. The method comprises the following steps: feeding an ethylene monomer, a catalyst and a solvent into a first slurry reactor; dividing the first slurry mixed solution into a first branch slurry mixed solution, a second branch slurry mixed solution and a third branch slurry mixed solution; the branch slurry mixed liquid is subjected to different reaction processes, the finally gathered slurry mixed liquid is reacted and then passes through a second devolatilization device and a second axial flow pump, and a polyethylene product is obtained. According to the invention, the slurry mixed liquid is shunted, so that each branch slurry mixed liquid is subjected to different reaction processes and different numbers of slurry reactors, the problem of poor flexibility of slurry polyethylene reaction equipment is effectively solved, and various polyethylene products can be produced by using one set of equipment. 本发明公开了一种用于淤浆聚乙烯的制备方法，所述方法包括步骤：将乙烯单体、催化剂、