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HDPE Pellets: Ethylene Polymerised in a Fluidised Bed
High-density polyethylene is made at low pressure on a Ziegler catalyst (a titanium halide with an aluminium compound). In the gas-phase process, ethylene flows up through a fluidised bed of fine catalyst at 85–100 °C and 20 bar and grows into polymer powder, which is melted and cut into pellets.
The picture: our diagram of the bed reactor and extruder.
Juu
Continuous
Maagizo
1
1
Polymerise in a fluidised bed
Polymerise in a fluidised bed
Feed fine catalyst into the bed reactor and blow ethylene up through it at 85–100 °C and 20 bar. The polymer grows on the catalyst grains.
Vifaa kwa hatua hii:
Ethilini1 tZana zinazohitajika:
Kinu cha tabaka lililoelea
Kichocheo cha Ziegler-Natta (TiCl4 kwenye MgCl2)
Kibana gesi2
2
Take off the powder
Take off the powder
Draw the polyethylene powder off the bed; compress the unreacted ethylene and send it round again.
Zana zinazohitajika:
Kinu cha tabaka lililoeleaKibana gesi3
3
Pelletise
Pelletise
Melt the powder in the extruder and cut the strand into pellets.
Zana zinazohitajika:
Kitoaji cha plastiki4
4
Ethylene gas per kilogram of polymer
Ethylene gas per kilogram of polymer
Inapakia daftari la Jupyter…
Zana Zinazohitajika
4- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
Mchoro huu unatengeneza
Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.