- Iso-longifolene (C15H24), an isomeric product of longifolene (C15H24), is extensively used in perfumery, fragrance, food and pharmaceutical industries due to its woody amber odor.
- The existing commercial method for the preparation of iso-longifolene from longifolene involves multi-step homogeneous catalytic process using corrosive liquid acid (e.g. sulfuric acid) that needs neutralization before waste disposal.
- We have prepared iso-longifolene from longifolene in a single step in presence of a solid acid catalyst, which is eco-friendly, easily separable and re-usable.
• Single step, solvent free heterogeneous green catalytic synthesis of iso-longifolene resulting into 90-95% conversion of longifolene with ~100% selectivity of iso-longifolene.
• Use of an eco-friendly, separable and re-usable solid acid catalyst having excellent performance on re-cycling as an alternative to conventionally used homogeneous acid catalyst.
The reaction has been successfully scaled up to 1 kg in liquid phase batch reactor with similar activity as that of lab scale experiments (2 g).
- Reasonable cost
- International market
- Imported largely from China
The process is solvent free and environment friendly using an eco-friendly, easily separable and re-usable solid acid catalyst (and an endeavor to replace conventional liquid acid catalysts (e.g. sulfuric acid))
Non-toxic solvents and reagents for catalyst synthesis and longifolene
Stirred batch reactor, furnace and gas chromatograph (GC)
The price of longifolene is ~₹130/- per kg Isolongifolene is imported mainly from China companies (Zauba.com) with varied price ranging $2 to $120 per kg, probably based on purity on scale of shipment
Green catalytic process for the synthesis of isolongifolene perfumery chemical over eco-friendly, re-usable solid acid catalyst
