The U.S. imports lots of alumina, which is a key component of aluminum. Brimstone says it can produce the ingredient ...

The company has yet to chose a site to produce green cement — and alumina, using a new process. Oakland-based cleantech startup Brimstone is seeking a site for a new factory to produce both ...

California-based startup Brimstone is producing alumina as a byproduct of a low-carbon alternative to cement. A low-carbon concrete company backed by the Department of Energy says that it will ...

The plant will simultaneously produce smelter-grade alumina, along with previously disclosed co-products such as portland cement and supplementary cementitious materials (SCM). The demonstration ...

Brimstone finalizes up-to $189M federal award for efficient and sustainable Rock Refinery™ co-producing portland cement, a second concrete ingredient, and alumina from U.S.-sourced rocks ...