When and what exactly is Repsol planning to restart at the Sines site in Portugal?

Repsol plans to restart the Sines cracker plant and its associated butadiene extraction unit in June of this year, according to sources cited in the news. The cracker is a mixed-feedstock facility with annual production capacities of 410,000 tonnes of ethylene and 215,000 tonnes of propylene, while the butadiene unit has a capacity of 50,000 tonnes per year. This facility has been offline since 2023 for extended maintenance.

What new production facilities is Repsol building at the Sines site, and what are their timelines and capacities?

Repsol is constructing two new plants at the Sines site: a linear low-density polyethylene (LLDPE) unit and a polypropylene (PP) unit, each with a designed annual capacity of 300,000 tonnes; the total investment for both projects is €657 million. Originally scheduled to start operations in 2025, their commissioning has been delayed to 2026. Additionally, Repsol already operates a polyethylene plant at the site with an annual capacity of 295,000 tonnes.

Repsol to Restart Portugal's Sines Cracker Plant

May 19, 2026

Repsol plans to restart its Sines cracker and butadiene units this June following long-term maintenance, restoring significant ethylene and propylene capacity. Concurrently, new €657 million LLDPE and PP projects at the site are delayed until 2026.

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