Discussion
Alkylation combines
Answer: A
Correct answer: isobutane with light olefins
Alkylation reacts isobutane with propylene or butylenes over a strong acid catalyst to give a branched paraffin of high octane and low volatility. Its value is that it converts two low-value light streams into a premium gasoline blendstock with no aromatics and no olefins - which is exactly what tightening fuel specifications have made scarce.
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