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

What happened

It achieves this by switching to silicate rocks instead of standard limestone, which releases carbon dioxide when it’s heated. Brimstone is making strides on two industrial problems, reducing the emissions from cement and providing a way to produce more critical minerals within the US.

If the company can do both, with the same rocks in the same plant, it would unlock a cleaner and more efficient process for manufacturing building materials, aluminum, steel, and more. Brimstone is a code-switching climate tech company for these polarized political times.

The US-based startup—part green cement company, part critical mineral producer—is well positioned to sustain its momentum no matter which party is in power. During the more climate-focused Biden administration, the company’s primary pitch was its ability to produce cement while generating about 60% less greenhouse-gas emissions.