Consider Dividing Wall Columns

These distillation units often can provide both capital and energy savings.

By John G. Pendergast, David Vickery, Patrick Au-Yeung and Joe Anderson, The Dow Chemical Company

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John G. Pendergast is a Freeport, Texas,-based scientist, senior technical leader in the Engineering and Process Sciences group of The Dow Chemical Co., David Vickery is a senior process engineering associate at Dow’s Engineering Solutions Technology Center in Midland, Mich., Patrick Au-Yeung is a senior research specialist in the Engineering and Process Sciences group in Midland, and Joe Anderson is a senior research specialist at Dow’s Michigan Operations, Midland. E-mail them at,,, and

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