Progress in Development of Catalyst Systems for Coordinated Polymerization of Olefins

2014 ◽  
Vol 900 ◽  
pp. 11-14 ◽  
Author(s):  
Wei Zhou ◽  
Lei Zhong ◽  
Wei Dong Li
Keyword(s):  
Transition Metal ◽  
Olefin Polymerization ◽  
Catalyst System ◽  
Metal Catalyst ◽  
Metallocene Catalysts ◽  
Catalytic Polymerization ◽  
Transition Metal Catalyst ◽  
Polymerization Catalyst ◽  
Catalyst Systems ◽  
Ziegler Natta Catalysts

The research progresses about polyolefin catalyst systems in recent years are summarized. Focusing on the type and properties of the catalytic polymerization of the olefin polymerization catalyst, including typical Ziegler-Natta catalysts, metallocene catalysts and post-transition metal catalyst system. Then the new post-transition metal catalyst is introduced.

scholarly journals Research Progress of Pre - transition Metal Olefin Polymerization Catalyst for Salicylaldehyde Imine

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Lulu Hou ◽  
Hongyu Ren ◽  
Baoli Guo
Keyword(s):  
Transition Metal ◽  
Active Sites ◽  
Olefin Polymerization ◽  
Product Distribution ◽  
Catalytic Performance ◽  
Industrial Applications ◽  
Research Progress ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Polymerization Catalyst

Salicylaldehyde imine transition metal catalyst is a kind of olefin polymerization catalyst which is widely used in the coordination of salicylaldehyde imine ligand and pre-transition metal. Salicylaldehyde imine ligands have the characteristics of easily insert different substituents via organic synthesize. Therefore, the regulation of the polymerization activity, polymerization product and product distribution can be achieved by changing the steric hindrance effect, electronic effect and the number of metal active sites which near the catalytic active center. The development status of the transition metal catalyst of salicylaldehyde imide was summarized in this paper. The influence of the ligand structure of salicylaldehyde imide transition metal catalyst on the catalytic performance which involved the high selectivity ethylene trimerization, ethylene / α-olefin, / Polar monomer copolymerization, ethylene polymerization production of ultra-high molecular weight polyethylene and many other areas of olefin polymerization was elaborated and providing references for further study and industrial applications of this catalyst.

Pyridine mediated transition-metal-free direct alkylation of anilines using alcohols via borrowing hydrogen conditions

2020 ◽  
Vol 56 (88) ◽  
pp. 13607-13610 ◽  
Author(s):  
Rajagopal Pothikumar ◽  
Venugopal T Bhat ◽  
Kayambu Namitharan
Keyword(s):  
Transition Metal ◽  
Traditional Approach ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Metal Free ◽  
Borrowing Hydrogen ◽  
Activation Of Alcohols ◽  
Catalyst Systems ◽  
Hydrogen Reactions

Herein, we report aza-aromatics based organic mediators as a readily accessible alternative to the traditional approach of using transition metal catalyst systems for the activation of alcohols in borrowing hydrogen reactions.

Accelerated Ambient-Temperature ATRP of Methyl Acrylate in Alcohol-Water Solutions with a Mixed Transition-Metal Catalyst System

2012 ◽  
Vol 213 (16) ◽  
pp. 1677-1687 ◽  
Author(s):  
Carlos M. R. Abreu ◽  
Patrícia V. Mendonça ◽  
Arménio C. Serra ◽  
Jorge F. J. Coelho ◽  
Anatoliy V. Popov ◽  
...  
Keyword(s):  
Transition Metal ◽  
Ambient Temperature ◽  
Methyl Acrylate ◽  
Catalyst System ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Water Solutions ◽  
Alcohol Water ◽  
Mixed Transition

H2O2 in WEB: a highly efficient catalyst system for the Dakin reaction

2015 ◽  
Vol 17 (9) ◽  
pp. 4533-4536 ◽  
Author(s):  
Bishwajit Saikia ◽  
Parinita Borah ◽  
Nabin Chandra Barua
Keyword(s):  
Transition Metal ◽  
Organic Solvent ◽  
Room Temperature ◽  
Reaction Times ◽  
Water Extract ◽  
Catalyst System ◽  
Metal Catalyst ◽  
Efficient Catalyst ◽  
Transition Metal Catalyst ◽  
Neat Water

Without using any transition metal catalyst, ligand, base, toxic or hazardous reagent, additives/promoters and organic solvent, Dakin reactions have been successfully carried out by using H2O2 in neat ‘Water Extract of Banana’ (WEB) at room temperature under aerobic conditions in very short reaction times.

Progress in propylene homo- and copolymers using advance transition metal catalyst system

2021 ◽  
Author(s):  
Anurag Mishra ◽  
Harshad R. Patil ◽  
VirendraKumar Kumar Gupta
Keyword(s):  
Transition Metal ◽  
Catalyst System ◽  
Metal Catalysts ◽  
Transition Metal Catalysts ◽  
Propylene Polymerization ◽  
Metal Catalyst ◽  
Transition Metal Catalyst ◽  
Catalyst Development ◽  
System P ◽  
Homogeneous Media

The transition metal catalysts have evolved dynamically in last few years for propylene polymerization and copolymerization in homogeneous media. The trends in catalyst development have moved from modification of Group...

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