A preparation method and application of a catalyst for preparing polyolefin particles with high sphericity and low particle size
A high sphericity, polyolefin technology, applied in the field of olefin polymerization, can solve the problems of increased processing cost, unfavorable processing, damage to polymer chain integrity, etc., and achieves the effect of reducing bulk density, simple method and particle size.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0045] As mentioned above, the present invention discloses a method for preparing a catalyst for preparing polyolefin particles with high sphericity and low particle size, which comprises the following steps:
[0046] (a) magnesium halide, alcohol compound, auxiliary agent, part of the internal electron donor and solvent are mixed to prepare mixture I;
[0047] (b) Add the above-mentioned mixture I into the reactor, preheat it to -30°C-30°C, and add the titanium compound dropwise; or,
[0048]Add a titanium compound into the reactor, preheat it to -30°C-30°C, and add the above-mentioned mixture I dropwise;
[0049] (c) After the dropwise addition is completed, the temperature of the reaction system is raised to 90°C-130°C after 30 minutes to 3 hours, and the remaining internal electron donor is added to continue the reaction;
[0050] (d) filter out the liquid in the reaction system, add the remaining titanium compound, and continue the reaction;
[0051] (e) After the react...
Embodiment 1
[0063] In the reactor fully replaced by high-purity nitrogen, add 4.94g of anhydrous magnesium chloride, 18.9g of isooctyl alcohol, and 30ml of decane in sequence, raise the temperature to 130°C under stirring, and maintain it for 2 hours, then add 2.65g of tetrabutyl titanate The ester and 2.05g of diisobutyl phthalate were reacted at 130°C for 1 hour, and finally cooled to room temperature to form a homogeneous transparent solution, namely mixture I.
[0064] Add 200ml of titanium tetrachloride to the reaction kettle, stir and preheat to 0°C, add the mixture I dropwise to the titanium tetrachloride in about 2 hours. After the dropwise addition was completed, the temperature was raised to 110° C. within 2 hours. 1.23 g of internal electron donor diisobutyl phthalate was added. After reacting at this temperature for 2 hours, remove the reaction liquid, add 200ml of titanium tetrachloride again, and react for 2 hours. Finally, the reaction liquid was removed, and the remainin...
Embodiment 2
[0067] In the reactor fully replaced by high-purity nitrogen, add 4.94g of anhydrous magnesium chloride, 18.9g of isooctyl alcohol, and 30ml of decane in sequence, raise the temperature to 130°C under stirring, and maintain it for 2 hours, then add 2.65g of tetrabutyl titanate The ester and 2.05g of diisobutyl phthalate were reacted at 130°C for 1 hour, and finally cooled to room temperature to form a homogeneous transparent solution, namely mixture I.
[0068] Add the mixture I to the reaction kettle, stir and preheat to 0°C, and add 100 mL of titanium tetrachloride dropwise into the reaction kettle for about 1 hour. After the dropwise addition was completed, the temperature was raised to 110° C. within 2 hours. 1.23 g of internal electron donor diisobutyl phthalate was added. After reacting at this temperature for 2 hours, remove the reaction liquid, add 200ml of titanium tetrachloride again, and react for 2 hours. Finally, the reaction liquid was removed, and the remainin...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More