पर्यावरणीय जोखिम मूल्यांकन और निवारण


The production of low-molecular weight polyisobutene.

Daniel Archer

A model for a cycle that can, on a fundamental level, be improved by the utilization of an impetus is the blend of poly (2-methyl-propene)s ("polyisobutenes"), which are significant for various modern applications. Every year a few 100,000 t are created. The creation of low-atomic weight polyisobutenes through cationic inception by an abundance of Lewis acids is grounded. Ordinarily, these initiators require the use of solvents like chloroform, dichloromethane and ethylene and temperatures far under 0°C (-100°C on account of ethylene as dissolvable). Dissolvable settled change metal edifices with pitifully planning counter anions beat these downsides and subsequently are more effective, yet in addition all the more ecologically kindhearted: they can be applied at encompassing temperature and in non-chlorinated solvents at low fixations.