Process for producing catalyst for olefin polymerization and process for producing olefin polymer
A technology for olefin polymers and olefin polymerization, applied in the field of preparation of catalysts for olefin polymerization, capable of solving unsatisfactory problems
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[0045] With regard to the preparation method of the solid catalyst component, as examples, the following methods (1)-(5) can be enumerated:
[0046] method (1), comprising the step of bringing a magnesium halide compound and a titanium compound into contact with each other;
[0047] method (2), comprising the step of bringing a magnesium halide compound, an electron donor and a titanium compound into contact with each other;
[0048] method (3), comprising the steps of dissolving a magnesium halide compound and a titanium compound in an electron donor solvent to obtain a solution, and impregnating the carrier with the solution;
[0049] method (4), comprising the step of bringing a dialkoxymagnesium compound and a titanium halide compound into contact with each other; and
[0050] Method (5), comprising making (a) a solid catalyst component precursor containing a magnesium atom, a titanium atom and an alkoxy group, (b) a halogenated compound having halogenation ability, and (...
Embodiment 1
[0188] (1) Preparation of solid catalyst component precursor
[0189] A reactor equipped with a stirrer was purged with nitrogen, and thereafter, 800 liters of hexane, 349 kg of tetraethoxysilane and 38 kg of tetrabutoxytitanium were fed thereinto and stirred to obtain a mixture. Next, 852 l (concentration = 2.1 mol / l) of a dibutyl magnesium chloride solution in dibutyl ether was added dropwise to the mixture over 5 hours while maintaining the reactor temperature at 5°C. When the dropwise addition was complete, the mixture was stirred at 8°C for 1 hour and at 20°C for an additional 1 hour. Afterwards, the reaction mixture was filtered and the solid obtained was washed 3 times with 1100 1 of toluene each time. Toluene was added to the washed solid to obtain a slurry. A 50 ml sample of this slurry was withdrawn, and the solvent was removed to obtain 8.15 g of a solid catalyst component precursor.
[0190] It is determined that the solid catalyst component precursor contains T...
Embodiment 2
[0199] Repeat embodiment 1, difference is to change the 2,2-dimethoxypropane of 0.57mmol into 3,3-dimethoxyhexane in embodiment 1 (3), and, embodiment 1 ( 3) The amount of the solid catalyst component was changed to 14.1 mg, so that 24 g of polymer with satisfactory powder properties were obtained. The polymer was found to exhibit little sticking to the inner walls of the autoclave and the stirrer.
[0200] The polymer yield (polymerization activity) per unit amount of catalyst was 1700 g polymer / g solid catalyst component. The polymer was found to have SCB: 21.1, FR: 0.36, FRR: 24.3 and CXS: 9.0 wt%.
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