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NAMS 2002 Workshop - ICOM 2008

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Pervaporation and Vapor Permeation II – 1 – Keynote<br />

Thursday July 17, 2:15 PM-3:00 PM, Moloka’i<br />

Aromatics Control in Refining with Pervaporation<br />

R. Harding, W.R. Grace & Co.-Conn., Columbia, Maryland, USA<br />

L. White (Speaker), W.R. Grace & Co.-Conn., Columbia, Maryland, USA -<br />

lloyd.s.white@grace.com<br />

Benzene, toluene, and xylenes (BTX) are commodity chemicals produced in<br />

large volumes at refineries. Benzene, however, attracts regulatory interest due to<br />

a carcinogenic nature and also has numerous other unique chemical properties.<br />

We have seen that these aromatics (BTX) can interact strongly with<br />

pervaporation membranes. Given that aromatic selective membranes can<br />

selectively transport even low levels of benzene in pervaporation mode, Grace<br />

has been able to demonstrate that benzene levels can easily be reduced to less<br />

than 0.2% in refinery process streams. These new aromatic selective<br />

membranes, part of the Aromem(TM) class, are being applied to real world<br />

refining streams to selectively control benzene levels. This class of membranes,<br />

built upon the S-Brane(TM) technology platform, is ready for commercial testing.<br />

S-Brane and Aromem are trademarks of W.R. Grace.

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