Alkylate Production

Alkylate is an excellent, high-octane blending component for motor gasoline, and is well-accepted in the marketplace. Alkylate is made by reacting light olefins, such as butylenes, from typical refinery sources; fluid catalytic cracking units, or from steam cracking units, with isoparaffins, such as isobutane, in the presence of an acidic catalyst.

The CB&I CDAlky® gasoline alkylation technology is an advanced sulfuric acid alkylation process that operates at significantly lower temperatures than conventional technology—below 0°C—which favors the formation of the desired product isomer, trimethylpentane. Side reactions are greatly minimized, which also reduces acid consumption rates appreciably. 

The CB&I AlkyClean® gasoline alkylation technology employs a true solid alkylation catalyst. For refiners needing or wanting to avoid liquid acid catalyst altogether, the AlkyClean technology offers such a solution. 

Both technologies have been successfully commercialized.


Butanes to Alkylate

There are strong economic incentives for on-purpose upgrading of butanes to alkylate. CB&I offers the only proven scheme to yield the highest alkylate quality (up to 98 RON) in the market place.

Iso-butylene to Alkylate

The presence of high concentrations of isobutylene in alkylation olefin feeds reduces the alkylate product quality and octane value due to its highly reactive nature. CB&I’s CDAlkyPlus® technology couples the CDAlky® alkylation process with a simple olefin pretreatment step when high concentrations of isobutylene are present in the olefin feed.

Recover/Upgrade Refinery C2+

Low Pressure Olefins Recovery is a cost-effective route to recovery ethylene, ethane and other hydrocarbons from FCC, coker and other refinery gas streams.  

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