Increasing demand on refinery operations spurred much discussion of refining catalysts and additives at the National Petroleum Refiners Association annual question and answer session on refining and petrochemical technology, held Oct. 16-18, 1991, in Denver. Herbert Bruch, NPRA technical director, moderated the renowned meeting, where representatives of the international refining and petrochemical industries come together from around the world to discuss pertinent and diverse topics. Presubmitted questions are first answered by a select panel of refiners, petrochemical producers, and industry experts (see box). Then the audience is invi...

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