Sustainability 2009, 1(1), 35-42; doi:10.3390/su1010035
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On the Way to Improve the Environmental Benignity of Chemical Processes: Novel Catalysts for a Polymerization Process

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Received: 10 February 2009; Accepted: 14 March 2009 / Published: 19 March 2009
(This article belongs to the Special Issue Green Chemistry for Environment and Health)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: An example for a process that can, in principle, be improved by the application of a catalyst is the synthesis of poly(2-methyl-propene)s (“polyisobutenes”), which are important for numerous industrial applications. Each year several 100,000 t are produced. The production of low-molecular weight polyisobutenes by means of cationic initiation by an excess of Lewis acids is well established. Typically, these initiators require the usage of solvents like chloroform, dichloromethane and ethylene and temperatures far below 0 °C (–100 °C in the case of ethylene as solvent). Solvent stabilized transition metal complexes with weakly coordinating counter anions overcome these drawbacks and thus are not only more efficient, but also more environmentally benign: they can be applied at ambient temperature and in non chlorinated solvents at low concentrations.
Keywords: Solvent ligands; weakly coordinating anions; transition metals; polymerization
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MDPI and ACS Style

Rach, S.F.; Kühn, F.E. On the Way to Improve the Environmental Benignity of Chemical Processes: Novel Catalysts for a Polymerization Process. Sustainability 2009, 1, 35-42.

AMA Style

Rach SF, Kühn FE. On the Way to Improve the Environmental Benignity of Chemical Processes: Novel Catalysts for a Polymerization Process. Sustainability. 2009; 1(1):35-42.

Chicago/Turabian Style

Rach, Silvana F.; Kühn, Fritz E. 2009. "On the Way to Improve the Environmental Benignity of Chemical Processes: Novel Catalysts for a Polymerization Process." Sustainability 1, no. 1: 35-42.

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