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Brimstone and its one-stop process for making cleaner cement and critical minerals

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Briefings

Brimstone, founded in 2019 in Oakland, California, is a US-based climate tech company transitioning from a cement producer to a critical mineral processor. During the Biden administration, it focused on reducing cement emissions by 60% through silicate rocks, while the Trump administration shifted its strategy to highlight secondary benefits like alumina and steel production. The company secured commercial deals with Amazon and Century Aluminum but faces significant challenges in scaling production, including a 2023 grant revocation and a 2028 operational timeline for its first full-scale factory.

Key points

• Brimstone is a US-based startup founded in 2019 headquartered in Oakland, California, operating in the heavy industry sector.
• The company achieved third-party industry certification for its cement manufacturing process in 2023, qualifying it for standard manufacturing projects.

Context and limitations

Brimstone has not yet produced any commercial-scale materials, and financial and technical challenges remain. The company faces uncertainty regarding economic viability and the ability to extract sufficient quantities of diverse minerals from a single rock type.

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