GC, Toray develop bio-based nylon 6,6 using cassava waste

PTT Global Chemical Public Company Limited (GC) and Toray Industries have jointly developed a first-of-its-kind manufacturing technology for producing bio-based adipic acid and 100% bio-based nylon 6,6 using agricultural waste materials.

The new process uses starch residues from cassava production to create bio-muconic acid through fermentation, which is then converted into bio-based adipic acid. This adipic acid is later used to manufacture fully bio-based nylon 6,6.

The development comes as industries around the world continue to focus on reducing greenhouse gas emissions and lowering dependence on fossil fuel-based raw materials. The chemical sector is increasingly exploring renewable biomass resources that do not compete with food production.

Cassava pulp, which is generated as a byproduct during starch extraction from cassava, has been identified as a promising raw material for the process. Since cassava is widely cultivated for food purposes, the residue can be supplied consistently without requiring additional farmland expansion. This also helps reduce the risk of indirect land use change (ILUC), which can occur when new agricultural land is created for industrial raw materials.

Going forward, GC plans to scale up the production of bio-muconic acid and bio-based adipic acid, while Toray will continue building a supply chain for textile applications made from 100% bio-based nylon 6,6.