November 2015

Catalysts

Remove O2 and CO from monomer and N2 streams in polymer plants

To prevent deactivation, the latest generation of polymerization catalysts requires removal of a wide range of contaminants to ultra-low levels in the monomer, comonomer, solvent and reaction-controlling gas streams in polyolefin production processes.

Smith, D., UOP, a Honeywell company

To prevent deactivation, the latest generation of polymerization catalysts requires removal of a wide range of contaminants to ultra-low levels in the monomer, comonomer, solvent and reaction-controlling gas streams in polyolefin production processes. The catalysts remove two contaminants of particular concern, oxygen (O2) and carbon monoxide (CO), with catalytic processes that use metal-oxide-based adsorbents at ambient or elevated temperatures. This article discusses reactions involved in the removal of these contaminants, as well as “regeneration” (i.e., reduction and oxidation steps) procedures, and reviews performance data from a major polymer plant using these CuO-on-alumina catalysts

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