Revamp of HF alkylation unit employs solid-acid catalyst

Alkylate is in short supply in the US. The renewable fuels standard (RFS) mandates the use of ethanol in gasoline. The high vapor pressure of ethanol requires a reduction in other light gasoline components such as butanes and pentanes in order to meet federal Reid vapor pressure standards. The butane and pentane loss will be about 0.4 gal/1 gal of ethanol added to the gasoline pool.Octane-based alkylate is a thus a key alternative to compensating for the loss of these light components without adding to the aromatic or olefinic content of the gasoline. A severe alkylate shortage contributed to a spike in gasoline prices in summer 2008.1Making matters worse, several hydrogen fluoride alkyla...

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