- Grassroots Alkylation Project
A part of a strategic program, Valero Energy is working with our team to implement a sulfuric acid catalyzed butylene alkylation unit technology package. We are responsible for all portions of the grassroots unit design, including the reaction, compression, effluent treating and fractionation areas. Specific design modifications to the licensor package have been made to reduce capital costs and unit footprint. The project also involves the conversion of an existing alkylation unit from a butylene feedstock to an amylene feedstock and other outside battery limits (OSBL) scope.
- FEP-2 estimate
- FEP-3 estimate
- Detailed design
The grassroots unit will produce 12,800 BPD of alkylate. Fresh butylene and isobutane are fed from the battery limits to reactors with a sulfuric acid catalyst.
An existing butylene sulfuric acid catalyzed, using two reactor technologies, will be reconfigured to operate with amylene feed. The revamped unit will produce 14,000 BPD of high-octane, low-vapor pressure product, of which 8,500 BPD is equivalent to traditional alkylate. Our team is responsible for the design modification within the existing unit, as well intermediate streams that that are transferred between the grassroots and revamped unit.
Limited plot space and capital budget were driving factors in the modification and/or descoping of the technology package recommended equipment. The result is an efficient, economical unit without unnecessary surge capacity, local instrumentation and trim cooling capacity. All heat exchangers are being specified as welded bloc-style to accommodate space requirements. Repurposed equipment from OSBL will replace some equipment from the technology package.
We designed this unit around unique client requests while minimizing the risk of compromising technology performance guarantees — resulting in significant capital savings.
- Fast-track engineering schedule
- Brownfield site
- 12,800 BPD grassroots alkylation unit
- 14,000 BPD (8,500 BPD C6+) alkylation unit revamp
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