2008
DOI: 10.1016/j.apcata.2008.08.016
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Particle growth of magnesium alkoxide as a carrier material for polypropylene polymerization catalyst

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Cited by 18 publications
(12 citation statements)
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“…Magnified images revealed that these particles were composed by the agglomeration of thin plate‐like building units, whose lateral dimension varied in the range of 500–1 000 nm with the thickness about 100 nm. These morphological characteristics are typical for Mg(OEt) 2 synthesized as a support of Ziegler–Natta catalysts . By increasing the i ‐propanol ratio ≥5 mol%, macroparticles deviated from the spherical shape.…”
Section: Resultsmentioning
confidence: 73%
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“…Magnified images revealed that these particles were composed by the agglomeration of thin plate‐like building units, whose lateral dimension varied in the range of 500–1 000 nm with the thickness about 100 nm. These morphological characteristics are typical for Mg(OEt) 2 synthesized as a support of Ziegler–Natta catalysts . By increasing the i ‐propanol ratio ≥5 mol%, macroparticles deviated from the spherical shape.…”
Section: Resultsmentioning
confidence: 73%
“…The observed XRD patterns for Mg(OR) 2 containing i-propoxide 3 mol% were quite similar to those reported in previous literature, exhibiting three characteristic diffractions between 8 and 118 (denoted as Peaks I-III from the small-angle side). [23,24] On the other hand, the Mg(OR) 2 samples containing ipropoxide !5 mol% exhibited totally different XRD patterns with two characteristic diffractions located at 10.6 and 23.38 (denoted as Peaks IV,V, respectively). The transition of the crystalline phases across 5 mol% of ipropoxide coincided well with the substantial changes of the bulk density and morphologies at both macro and microscopic scales.…”
mentioning
confidence: 99%
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“…The controlled morphology catalyst resulted in synthesis of PP resin in reactor with an advantage uniform and spherical morphology [24][25][26][27][28] , which in turn enhanced the throughput of the reactor and down the line extruder. This resulted in significant increase in production capacity of PP in the same reactor setup as, first, the catalytic productivity increased and, second, the processing rate of the resin increased.…”
Section: Introductionmentioning
confidence: 98%
“…Authors have studied in detail the morphology of MGE and the mechanism of reaction precipitation in the MGE synthesis;10 plate crystals (secondary particles), which consist of a great number of minute crystalline (primary) particles continuously grow and combine with each other to form round MGE (tertiary) particles and the unique self‐organized layer structure is completed. Moreover, in order to obtain spherical MGE particles having smooth surfaces, it was thought that it would be effective to lower and make more uniform the sizes of plate crystals and to constant make the MGE reaction rate, because the solubility of MGE was much smaller than the amount of MGE generated and the MGE crystallization rate was almost the same as the MGE generation rate;11 however, it seemed that there was a limit to the optimization of reaction conditions (a reaction temperature, a diameter of Mg particle, times of division injection of Mg, etc.)…”
Section: Introductionmentioning
confidence: 99%