Process for hydrogenating non-hormonal unsaturated plant-based steroids and regeneration of a used transition metal catalyst

摘要

A process is described for catalytic hydrogenation of non-hormonal unsaturated plant steroids and unsaturated plant-based fatty acids and triglycerides. The process is characterised by the use of a transition metal catalyst bound to a polymer support containing grafted groups. The catalyst is in the form of separate fibres, felt or wire, and is swollen with water before use. Hydrogenation is carried out at a temperature between room temperature and 200°C, and at an overpressure of 1 to 3 bar. The steroids are hydrogenated in a neutral organic solvent. The process further comprises regeneration of the used catalyst.