Recovery of isobutylene isomers in catalytic cracking liquefied gas
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In catalytic cracking liquefied gas, aside from isobutylene and methanol being used to produce MTBE, why are other isomers such as 1-butene and trans-2-butene not recovered? Is it due to the lower octane rating of the products, or is it because of the significant differences in catalysts, which makes design more difficult?
It is a raw material for alkylation units, used to produce isooctane-based high-octane gasoline components
The other butenes generally proceed directly to the alkylation unit to produce isooctane; some also return to the isomerization unit for further isomerization of the butenes, in order to continue producing MTBE