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Your search keyword '"A. Monoi"' showing total 4 results
Start Over Author "A. Monoi" Publisher american chemical society
4 results on '"A. Monoi"'

1. Polymerization of ethylene molecules chemisorbed on CrOH(super +) as a model system of chromium-containing catalyst

Author

Hanmura, Tetsu, Ichihashi, Masahiko, Monoi, Takashi, Matsuura, Kazuo, and Kondow, Tamotsu

Subjects
Chromium -- Chemical properties, Ethylene -- Chemical properties, Polymerization -- Research, Chemicals, plastics and rubber industries
Abstract

The reaction process of the production of CrOH(C2H4)2(super +) is studied in connection with the ethylene polymerization on a silica-supported chromium oxide catalyst. The calculation shows that the dimerization proceeds through CrOH(C2H4)(super +) (ethylene complex) and CrOH-(C2H4)2(super +) (ethylene complex), in which the ethylene molecules bind with CrOH(super +) through a pi-bonding.

Published
2005

3. Gas-phase reactions of O- and OH-containing Cr cluster ions with ethylene molecules: Isolation of reaction sites of Cr- containing catalysts for ethylene polymerization

Author

Hanmura, Tetsu, Ichihashi, Masahiko, Monoi, Takashi, Matsuura, Kazuo, and Kondow, Tamotsu

Subjects
Chromium -- Chemical properties, Polymerization -- Analysis, Ethylene -- Chemical properties, Chemicals, plastics and rubber industries
Abstract

The investigations of the reactions of ethylene on chromium cluster ions and their monoxides and hydroxides in the gas phase gave rise to the fact that only chromium monoxide and hydroxide ions are able to catalyze ethylene dimerization. These results indicate that in the Phillips catalyst, an atomic chromium bonded to O and OH of its substrate is the active center for ethylene polymerization.

Published
2004

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