Abstract
Terpene epoxides are considered as potential primary intermediates in the synthesis of numerous green polymers including epoxy resins, polycarbonates, nonisocyanate polyurethanes and even some polyamides. In this chapter we describe recent efforts from our group to develop catalytic and noncatalytic processes for terpene epoxidation using a variety of oxidizing agents and process intensification methods. Most experimental tests deal with limonene epoxidation with applicability to some other terpenes also demonstrated.
Highlights
In a more recent contribution, we studied coordination unsaturated titanium catalysts supported on SBA-16 mesoporous silica using anhydrous TBHP as the oxidizing agent for the epoxidation of limonene
A radical mechanism as exhibited in Scheme 3 was proposed for aerobic epoxidation of limonene in the presence of an aldehyde catalyzed by SBA-16 supported Co2+
ACsthe with various morphologies and different higher conversion catalyst prepared by the sol immobilipreparation methods for the aerobic epoxidation of limonene under solvent-free conditions zation (SI) method (40.4%), the one prepared by cation exchange Ru/G60(CE) showed the and without any radical initiator is presented in products
Summary
Monoterpenes are naturally occurring olefinic hydrocarbons comprising ten carbon atoms Their chemical properties are similar to those of significant petroleum derived monomers systematically used today in the production of high tonnage polymers [4]. Oxygen is by far the most desirable oxidant; it has the highest active oxygen content, the obviously lowest cost, and produces essentially no waste product It is directly employed in ethylene epoxidation, the largest epoxidation process (26 Mt global production in 2018) which uses Ag catalysts. The search for metal catalysts effective in activating molecular oxygen is a current goal of industrial research In this text we intend to review the work performed in our laboratory over the last five years, exploring the use of various oxidants in terpenes epoxidation.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
