Réaction #79447

Équation de réaction

ethanol

triisobutylaluminum

ethylene

methanol

ethylene

→

ethylene/1-octene

Conditions de réaction

Traitement

1. 1
   AutreTo a 2 liter-stainless steel autoclave thoroughly purged with nitrogen, 600 ml of hexane and 300 ml of 1-octene
2. 2
   workup.ADDITIONwere introduced
3. 3
   Autrewas elevated to 60° C
4. 4
   Autrepolymerization
5. 5
   Températureto maintain the total pressure at 3.0 Kg/cm2-G
6. 6
   Autreto terminate
7. 7
   Autrethe polymerization
8. 8
   Autrethe unreacted ethylene was purged out
9. 9
   AutreThe resulting reaction solution
10. 10
    Autreto precipitate a polymer
11. 11
    AutreThe polymer was separated by filtration
12. 12
    Autredried overnight under reduced pressure

Mode opératoire

To a 2 liter-stainless steel autoclave thoroughly purged with nitrogen, 600 ml of hexane and 300 ml of 1-octene were introduced, and the temperature of the system was elevated to 60° C. Then, 1 mmol of triisobutylaluminum and 0.5 ml (0.001 mmol in terms of Zr) of the catalyst solution prepared above were injected into the autoclave together with ethylene to initiate polymerization. Thereafter, only ethylene was continuously fed to maintain the total pressure at 3.0 Kg/cm2-G, and the polymerization was performed at 70° C. for 60 minutes. Then, a small amount of ethanol was fed to the system to terminate the polymerization, and the unreacted ethylene was purged out. The resulting reaction solution was introduced into a large excess of methanol to precipitate a polymer. The polymer was separated by filtration and dried overnight under reduced pressure, to obtain a long-chain branched ethylene/1-octene random copolymer.

Source