Research output: Contribution to journal › Article › peer-review
Titanium-magnesium Ziegler-Natta catalysts : new insight on the active sites precursor. / Potapov, A. G.
In: Molecular Catalysis, Vol. 432, 05.2017, p. 155-159.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Titanium-magnesium Ziegler-Natta catalysts
T2 - new insight on the active sites precursor
AU - Potapov, A. G.
PY - 2017/5
Y1 - 2017/5
N2 - Titanium-magnesium Ziegler-Natta catalysts are the basis of the modern processes for polypropylene production. These catalysts have been the object of numerous studies for many decades. Nevertheless, the structure of the catalysts remains a significant research focus. One of the major questions to be answered is the nature of the active sites precursor − the titanium compound, its form and structure on the surface of the catalysts. In the present study, the experimental data show that the precursor of the catalyst active site is TiCl4, which is weakly bound to the surface of the catalyst. This TiCl4 is able to migrate outside the catalyst particles and to adsorb on activated MgCl2, giving rise to new precursors of the active sites. The quantity of TiCl4, which is able to migrate easily, amounts to about half the total amount of titanium compounds in the catalysts. At the same time, the rest of titanium is tightly bound to the catalyst surface and does not produce the active sites.
AB - Titanium-magnesium Ziegler-Natta catalysts are the basis of the modern processes for polypropylene production. These catalysts have been the object of numerous studies for many decades. Nevertheless, the structure of the catalysts remains a significant research focus. One of the major questions to be answered is the nature of the active sites precursor − the titanium compound, its form and structure on the surface of the catalysts. In the present study, the experimental data show that the precursor of the catalyst active site is TiCl4, which is weakly bound to the surface of the catalyst. This TiCl4 is able to migrate outside the catalyst particles and to adsorb on activated MgCl2, giving rise to new precursors of the active sites. The quantity of TiCl4, which is able to migrate easily, amounts to about half the total amount of titanium compounds in the catalysts. At the same time, the rest of titanium is tightly bound to the catalyst surface and does not produce the active sites.
KW - Active sites
KW - MgCl surface
KW - Polypropylene
KW - Precursor
KW - Ziegler-Natta catalysts
KW - SURFACE SCIENCE
KW - AFM
KW - POLYMERIZATION
KW - MODEL
KW - OLEFINS
KW - MgCl2 surface
KW - SEM
KW - CHLORIDE
UR - http://www.scopus.com/inward/record.url?scp=85029650373&partnerID=8YFLogxK
U2 - 10.1016/j.mcat.2017.02.007
DO - 10.1016/j.mcat.2017.02.007
M3 - Article
AN - SCOPUS:85029650373
VL - 432
SP - 155
EP - 159
JO - Molecular Catalysis
JF - Molecular Catalysis
SN - 2468-8231
ER -
ID: 10068744