Polyethylene base resin powder and preparation method thereof
A basic resin and polyethylene technology, applied in the field of special materials for hollow blow molding, to achieve the effects of excellent environmental stress crack resistance, low melt index and high mechanical strength
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Embodiment 1
[0037] Raw materials for ethylene hexene copolymerized polyethylene base resin:
[0038] 1) The feed rate of polymer grade ethylene is 29.5 tons / hour;
[0039] 2) Catalyst: Titanium modification, silica gel as carrier, chromium catalyst with a particle size of 5-10 μm added at an amount of 1.5kg / hour; the catalyst activity is 15000gPE / gCat;
[0040] 3) 1-hexene addition 260kg / hour;
[0041] 4) The amount of oxygen added is 0.067kg / h;
[0042] 5) The amount of hydrogen added is 0.00kg / h;
[0043] The mixed gas is always in a circulating state, the refined raw materials ethylene and 1-hexene are placed in the raw material tank, and added to the reactor in proportion to establish a reaction system, and the activated catalyst is added to adjust the reaction temperature in the reactor 104±1°C, the reaction pressure in the reaction gas is 2.0±0.02MPa, the melt flow rate to the reaction product is 6.5g / 10min, and the density is 0.947g / cm 3, to obtain ethylene, 1-hexene copolymeri...
Embodiment 2
[0046] Ethylene, 1-hexene copolymerized polyethylene base resin powder raw materials:
[0047] 1) The feed rate of polymer grade ethylene is 30.0 tons / hour;
[0048] 2) Catalyst: Titanium modification, silica gel as carrier, chromium catalyst with a particle size of 5-10 μm added at an amount of 1.5kg / hour; the catalyst activity is 16000gPE / gCat;
[0049] 3) The amount of 1-hexene added is 270kg / hour;
[0050] 4) The amount of oxygen added is 0.067kg / h;
[0051] 5) The amount of hydrogen added is 1.1kg / h;
[0052] The mixed gas is always in a circulating state, the refined raw material ethylene and 1-hexene are placed in the raw material tank, added in proportion to the reactor, the reaction system is established, and the activated catalyst is added (pre-activation treatment and embodiment 1 Same), adjust the reaction temperature in the reactor to 104±1°C, the reaction pressure in the reaction gas is 2.0±0.02MPa, until the melt flow rate of the reaction product is 6.5g / 10mi...
Embodiment 3
[0054] Ethylene, 1-hexene copolymerized polyethylene base resin powder raw materials:
[0055] 1) The feed rate of polymer grade ethylene is 29.0 tons / hour;
[0056] 2) Catalyst: Titanium modification, silica gel as carrier, chromium-based catalyst with a particle size of 5-10 μm added at an amount of 1.45kg / hour; the catalyst activity is 17000gPE / gCat;
[0057] 3) The amount of 1-hexene added is 250kg / hour;
[0058] 4) The amount of oxygen added is 0.065kg / h;
[0059] 5) The amount of hydrogen added is 1.0kg / h;
[0060] The mixed gas is always in a circulating state, the refined raw material ethylene and 1-hexene are placed in the raw material tank, added in proportion to the reactor, the reaction system is established, and the activated catalyst is added (pre-activation treatment and embodiment 1 Same), adjust the reaction temperature in the reactor to 104±1°C, the reaction pressure in the reaction gas is 2.0±0.02MPa, until the melt flow rate of the reaction product is 6....
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