Gasoline volatility reductions expected from passage of the Clean Air Act (CAA) amendments will reduce U.S. demand for normal butane by an estimated 159,000 b/d by 1992. But long term demand for normal butane and isobutane will increase substantially because of gasoline reformulation, a study of natural gas liquids markets by Bonner & Moore Associates Inc., Houston, says. Increasing capacity for dehydrogenating isobutane to produce more isobutylene, a primary feedstock for methyl tertiary butyl ether, will drive up isobutane demand. By 1993, Bonner & Moore said, dehydrogenation of isobutane will produce about 84,000 b/d of isobutylene, ...

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