Process for the production of poliu00d3is liquids of origin renovu00c1vel by liquefau00c7u00c3o biomass agro forestry and agrifoods

摘要

The present invention concerns the process for producing liquid polyols of renewable origin from organic materials such as agro-forestry and agro-food biomass and respective industrial residues, constituting a profitable and bio-friendly alternative to commercial polyols obtained from petrochemical sources. The said process involves two steps in a single reactor: i) the activation of the substrate with an alkaline alcoholic solution (pre-functionalization); ii) the oxypropylation and liquefaction of the activated substrate in heterogeneous conditions. The latter step might also involve the controlled addition of a monomer polyol, also of renewable origin, so as to adjust the properties of the final product, taking the desired applications into account. The present process does not require any specific operations to isolate the end product. The polyols thus obtained can be used in the formulation and preparation of polyurethanes and polyesters being applicable in food, pharmaceutical, furniture, civil engineering, automotive and polymer industries.