A methyl tertiary butyl ether (MTBE) unit and a sulfuric acid alkylation unit work well together, producing higher alkylate octanes and reducing the load on the alkylation unit, according to Randy Peterson, senior process engineer at Stratco Inc., Leawood, Kan. Depending on the levels of feed contaminants, the acid consumption per volume of alkylate can decrease as a result of the reduced load, Peterson reported at Stratco's European Alkylation Seminar in Amsterdam last May. Additional propylenes, butylenes, or amylenes can also be alkylated to take advantage of the resulting excess capacity. The flow diagram of a ty...

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