Synthesis of azelaic acid from vegetable oil-based feedstocks

摘要

A multitude of synthesis methods for azelaic acid is evaluated in terms of feasibility and sustainability. Up to now, no alternative to industrially employed ozonolysis of oleic acid was developed.Azelaic acid (AA) is industrially used as component in a series of applications such as polyamides, polyesters, pharmaceuticals, plasticizers, lubricants, or hydraulic fluids [1-5]. It is utilized for food packaging (e.g., paper, film, and foil laminates), in electronics (e.g., flexible printed circuit board, coil insulation), textiles (e.g., footwear, interlining for labels, and emblems), and automotive (e.g., coatings, upholstered car seats, construction of sun visors) industries (http:// www.theautochannel.comews/2001/10/03/030506.html, http://www.emeryoleo.com/en/ozone-acids/). For instance, AA has superior solubility in organic solvents and water compared to other even chain C4-C12 dicarboxylic acids, which is advantageous in the formulation of high solids or solvent free systems. Polyamide 6.9 obtained from hexame-thylendiamine and AA is characterized by low water absorption and high-dimensional stability.