Journal
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
Volume 92, Issue 5, Pages 1104-1110Publisher
WILEY
DOI: 10.1002/jctb.5104
Keywords
carbonation; epoxidized castor oil; castor oil; kinetics; CO2 fixation
Categories
Funding
- Departamento Administrativo de Ciencia
- Tecnologia e Innovacion-Colciencias
- Convocatoria de Doctorados Nacionales
- Colciencias-Patrimonio Autonomo Fondo Nacional de Financiamiento para la Ciencia, la Tecnologia y la Innovacion
- Francisco Jose de Caldas and Universidad de Antioquia
- Comite para el Desarrollo de la Investigacion-Estrategia para apoyo a los grupos de investigacion en proceso de consolidacion
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BACKGROUNDCyclic fatty carbonates can be obtained from epoxidized vegetable oils and CO2 under mild conditions. The main application of these bio-derivatives is the production of thermoset polymers and non-isocyanate polyurethanes. Castor oil has a different chemical structure from the other oils that have been used for carbonation. In this work, a kinetic model was developed for high CO2 pressure carbonation of epoxidized castor oil. RESULTSThe highest epoxide group conversion (93%) was obtained at 130 degrees C and 480min. However, the highest content of carbonate groups (1.5 carbonates/molecule) was obtained at 115 degrees C and 180min. A kinetic model was proposed which included carbonation of epoxide as well as etherification of the oxirane ring as a competitive reaction. Both reactions were best fitted to pseudo-first-order kinetics. Activation energy of carbonation and etherification of the oxirane ring were estimated as 37.41 and 33.25 kJ mol(-1), respectively. CONCLUSIONCarbonated castor oil was produced from the epoxidized oil at 100-130 degrees C and a constant pressure of CO2 (0.5 MPa). Because of the polyfunctional character of the product, it could find applications as a monomer and as a synthetic building block for other bio-based chemicals. This product and the reaction pathway have not previously been disclosed. (c) 2016 Society of Chemical Industry
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