Brimstone is transforming industrial manufacturing by co-producing Ordinary Portland Cement (OPC), smelter grade alumina, and supplementary cementitious materials (SCM), along with steel, aluminum, magnesium, titanium, and other critical minerals through a single, energy-agnostic, fully electrifiable process. Using its patented Rock Refinery to elementally separate abundant calcium-silicate rocks, Brimstone avoids the carbon-heavy limestone used in traditional OPC production. This breakthrough yields seven times more product per tonne than conventional processes, securing domestic supply chains for materials essential to defense equipment, batteries, and advanced manufacturing. By integrating these $2.4 trillion markets into one carbon-negative roadmap, Brimstone eliminates the 8% of global CO2 tied to cement while unlocking unprecedented material abundance for global infrastructure.
News & Insights
In a deep-tech twofer, Brimstone aims to secure U.S. aluminum supply
Brimstone's $189 million federal award is a game-changer for cement decarbonization
DCVC 2023 Q2 update
Brimstone receives ASTM certification for its OPC: can now replace 98% of world’s cement
Brimstone: Rock Stars of the Cement Industry
DCVC 2023 Q1 update
DCVC Welcomes 2022
Reinventing Cement for a Zero-Carbon Future
In The Media
How Clean Energy Firms Are Trying to Survive the Trump Era
Silicon Valley Is Racing to Make Critical Minerals—and Blunt China’s Dominance
Climate tech startup Brimstone just lost a $189 million DOE grant—but it’s building its first plant anyway
Amazon to buy low-carbon cement from Brimstone
Clean cement startup Brimstone can make another key material: alumina
Start-ups Trying to (Profitably) Solve the World’s Hardest Problems
Current Climate: Limiting ‘Forever Chemicals’ In Drinking Water
Energy Department awards $6 billion for green industry buildout
To decarbonize cement, the industry needs a full transformation
The Best Inventions of 2023
6 innovative startups that are kicking CO2 out of cement and concrete
This startup CEO claims he can completely decarbonize the cement industry
Green linings & lessons from breakthroughs #159
Cement warms the planet. This green version just got a key nod of approval.
Cement is responsible for 8% of global emissions—but it doesn’t have to be
The Funded: UserTesting raises $140M in downsized IPO that missed its targets
The good times keep rolling for small, e-commerce business owners
Changing up the recipe to make low-carbon cement
Explore Companies
SenseMesh
Unifying cameras, sensors, and drones into one intelligent & actionable network
Atomic Alchemy
Producing essential radioisotopes for healthcare, industry, research, and defense
Alta Resource Technologies
Using advanced biochemistry to create a secure supply of critical minerals from waste and other low-grade sources
Slip Robotics
Automating loading dock operations