Catalyst component for vinyl polymerization and catalyst comprising the same
A technology of ethylene polymerization and catalyst, which is applied in the field of catalyst components, can solve the problem of unsatisfactory hydrogen adjustment sensitivity, etc., and achieve the effect of less subdivision content and high catalytic activity
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Embodiment 1
[0042] (1) Preparation of catalyst components: In a reactor fully replaced by high-purity nitrogen, 4.0g magnesium dichloride (0.042mol), 60ml toluene, 19.2g (0.084mol) tetraethoxytitanium, 6.9ml (0.1176mol) ethanol, 2.1ml (0.0126mol) triethoxyborane, heated to 70°C for reaction under stirring, and reacted at 70°C for 1 hour after the solid was completely dissolved to form a uniform solution. Cool down to 65°C, slowly add 21ml of 2M monochlorodiethylaluminum heptane solution dropwise, and maintain the reaction at 65°C for 1 hour, then raise the temperature to 90°C and continue the reaction for 1 hour. Cool the system to 30°C, let the solid precipitate, filter the filtrate, and wash the solid twice with 60ml hexane, add 60ml hexane to the solid and stir, slowly add 60ml titanium tetrachloride dropwise, and react at 30°C for 1 hour. Stirring was stopped, and the suspension was left to stand, the suspension was quickly separated into layers, the upper clear layer was removed, was...
Embodiment 2
[0046] (1) The synthesis of catalyst is the same as in Example 1. Only the amount of ethanol was changed from 6.9ml to 4.9ml.
[0047] (2) Ethylene polymerization is with embodiment 1. The catalyst composition and polymerization results are shown in Table 1.
Embodiment 3
[0049] (1) The synthesis of catalyst is the same as in Example 2. Just change diethylaluminum chloride to isobutylaluminum dichloride.
[0050] (2) Ethylene polymerization is with embodiment 1. The catalyst composition and polymerization results are shown in Table 1.
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