A kind of production method of impact-resistant polypropylene
A production method and polypropylene technology, which can be applied in the production of bulk chemicals and other directions, can solve problems such as increased production costs and reduced activity.
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preparation example 1
[0048] The component (a) in the catalyst used in the preparation method of the present invention is the titanium-containing solid catalyst component.
[0049] A 16L pressure-resistant reactor with a stirrer was fully replaced with nitrogen, and then 10L of ethanol, 300mL of 2-ethylhexanol, 11.2g of iodine, 8g of magnesium chloride and 640g of magnesium powder were added to the reactor. While stirring, the system was refluxed until no more hydrogen was emitted. Stop the reaction, wash with 3L ethanol, filter and dry. The resulting dialkoxymagnesium support. The obtained dialkoxymagnesium carrier has a D50 of 30.2 μm, a span value of 0.81, and an m value of 0.015. Take 650 g of the above-mentioned dialkoxymagnesium carrier and 3250 mL of toluene to prepare a suspension. In a 16L pressure-resistant reactor that has been repeatedly replaced by high-purity nitrogen, add 2600 mL of toluene and 3900 mL of titanium tetrachloride, raise the temperature to 80 ° C, then add the prepar...
preparation example 2
[0051] The component (a) in the catalyst used in the preparation method of the present invention is the titanium-containing solid catalyst component.
[0052] Take 650 g of the dialkoxymagnesium carrier in Preparation Example 1, 3250 mL of toluene and 65 mL of 2-isopropyl-2-isopentyl-1,3-dimethoxypropane to prepare a suspension. In a 16L pressure-resistant reaction kettle that has been repeatedly replaced by high-purity nitrogen, add 2600mL of toluene and 3900mL of titanium tetrachloride, raise the temperature to 80°C, then add the prepared suspension into the kettle, keep the temperature for 1 hour, and add 2-isopropyl Base-2-isoamyl-1,3-dimethoxypropane (1# ether) 65mL, slowly heated to 110°C, kept at constant temperature for 2 hours, and press-filtered to obtain a solid. The resulting solid was added to a mixed solution of 5070 mL of toluene and 3380 mL of titanium tetrachloride and stirred at 110° C. for 1 hour, and treated like this three times. Pressure filtration, the ...
Embodiment 1
[0053] The preparation of embodiment 1 impact polypropylene
[0054] The preparation of impact polypropylene in the present invention is all in figure 1completed on the device shown. The device is a set of pilot scale propylene polymerization gas phase reaction device with an output of 40kg / hr, of which 9 and 17 are horizontal stirred bed reactors. The horizontal stirred bed reactor is well known in the industry. It is a horizontally placed reactor with agitation. The polymerization catalyst and part of the reaction raw materials are added from one end of the reactor. The reactor is discharged from the end, and the function of stirring in the reactor is to cause the material to mix in the radial direction, without the effect of axial pushing or back mixing. Catalyst component (a) is as feed stream 1, and catalyst component (b) and component (c) are as feed stream 2, are respectively carried into the first reactor 9 by fresh propylene, carry out in the first reactor 9 Homop...
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Abstract
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