Olefin-Paraffin Separation

Hear about CMS’ new Olefin Parrafin separation technology at the AIChE meetings in Salt Lake City

Hybrid Distillation – Membrane Process to Increase Capacity and Reduce Costs for Production of Propylene and Ethylene

Tuesday, November 10, 20159:20 AM
155E (Salt Palace Convention Center)

Compact Membrane Systems has developed stable olefin-paraffin customized amorphous fluoropolymer (CAF) separation membranes with superior propylene flux and propylene/propane selectivity.

Ethylene and Propylene are two primary feedstocks for manufacture of petrochemicals.   A hybrid distillation-membrane process efficiently separating and recovering the olefin from the paraffin during these processes, would provide substantial economic benefits, by increasing capacity of existing distillation operations while simultaneously reducing costs.

CMS customized amorphous fluoropolymer (CAF) are a unique and high performing addition to the field, with permeance and selectivity above the industry Robeson curve.  Laboratory results show stability in the face of high levels of conventional foulants (e.g., sulfur containing gases).  Membranes do not need a constant feed stream to remain active over time, showing stable (180+ days) propylene flux and propylene/propane selectivity.

Laboratory experimental propylene-propane separation data and hybrid distillation – membrane system modeling results will be discussed more extensively at the presentation.

Process Intensification of Polyolefin Synthesis Using Novel Stable Perfluoro Based Membranes

Thursday, November 12, 201512:30 PM
155C (Salt Palace Convention Center)

CMS customized amorphous fluoropolymer (CAF) membranes can efficiently separate and recover the olefin from a polypropylene or polyethylene reactor purge stream, providing substantial economic benefit to these polymerization processes.

Ethylene and propylene, the primary feedstocks for the manufacture of polyethylene and polypropylene, represent a major component of the polymer manufacturing cost. Low concentrations of paraffin are present in the feedstock (ethane in the case of ethylene feed and propane in the case of propylene feed). As a part of the polymerization process, some of the reaction mixture is purged in order to limit the buildup of paraffin.  CMS proposes to recover valuable olefin from this purge stream, providing substantial economic benefit.

Analysis shows payback times for propylene plant process intensification to be less than 1 year, and 1-2 years for propylene/propane splitters. The results suggest that olefin flux is more important than olefin-paraffin selectivity for this application. These and other results will be discussed more extensively at the presentation.