CIRCA SUSTAINABLE CHEMICALS LIMITED

Their core work

CIRCA Sustainable Chemicals is a UK-based SME that develops bio-based chemicals — renewable solvents and functional polymers — derived from biomass feedstocks as drop-in replacements for petroleum-derived products. Their core industrial capability sits at the intersection of green chemistry and materials science: taking biological raw materials and converting them into performance chemicals with improved environmental and toxicity profiles. In both H2020 projects they contributed as an industrial chemistry partner, bringing commercial-scale knowledge of bio-based synthesis routes that academic consortium members typically lack. Their business model is built on making sustainable chemistry economically viable, not just scientifically possible.

What they specialise in

How they've shifted over time

In their first H2020 project (ReSolve, 2017-2020), CIRCA focused on the solvent side of sustainable chemistry — improving the performance and safety profile of renewable solvents for industrial use. By their second project (CHAMPION, 2020-2024), the focus shifted from solvents toward bio-based polymer materials: specifically, using aza-Michael addition chemistry with bio-based diamines to build thermosets and water-soluble polymers from natural feedstocks. This trajectory suggests CIRCA is broadening from a single-product chemistry company into a platform chemistry company — applying their core bio-based synthesis competence to a wider class of functional materials.

CIRCA is moving upstream from bio-based solvents into bio-based functional materials (thermosets, water-soluble polymers), suggesting future consortium relevance for circular materials, bio-composites, and specialty chemical substitution projects.

How they like to work

CIRCA has participated exclusively as a consortium partner — never as coordinator — across both H2020 projects, which is consistent with a focused industrial SME that brings specialist chemistry expertise rather than project management infrastructure. With 25 unique partners across 8 countries from only 2 projects, they connect into relatively large multi-partner consortia, indicating they are sought-after as an industrial chemistry provider rather than a passive participant. Working with them likely means engaging a company that contributes specific synthesis or scale-up capability and expects to be scoped to a defined technical work package.

CIRCA has built a surprisingly broad network for a two-project SME: 25 unique partners across 8 countries, all within European H2020 consortia. Their network is entirely European and concentrated in the bio-based chemicals and materials research ecosystem.

What sets them apart

CIRCA occupies a rare position as an industrial SME that combines proprietary bio-based chemistry know-how with a genuine commercial orientation — making them the kind of partner that can bridge university-led synthesis research and real-world product development. Unlike academic chemistry groups, they bring market awareness and scale-up considerations to consortium work. For projects seeking an industrial partner with credible bio-based chemistry credentials in both solvents and polymer materials, CIRCA is a targeted fit rather than a generic industry presence.

Highlights from their portfolio

• ReSolve
  CIRCA's largest H2020 award (EUR 203,332) and the project most directly aligned with their core business — developing renewable, low-toxicity solvents for industrial application.
• CHAMPION
  Represents a strategic expansion into bio-based polymer materials via aza-Michael chemistry, signalling CIRCA's move beyond solvents into the broader sustainable materials space.