title: Ion exchange resins as catalyst for the isomerization of alpha-pinene to camphene.
abstract: Camphene is an industrial intermediate compound for commercial chemicals such as isoborneol, isobornyl acetate and camphor. Industrially, the conventional process for camphene production consists of the isomerization of alpha-pinene using acidic TiO2 as catalyst. The use of this catalyst presents problems such as considerable time for preparation, reproducibility and recovery of catalyst from products after the alpha-pinene isomerization. For the first time, a commercial exchange resin was used as catalyst for this reaction. Based on the concentration of product as a function of the reaction time, the path of the alpha-pinene transformation to camphene and byproducts is proposed. Temperature and alpha-pinene/catalyst ratio were studied in order to optimize the yield to camphene production. The obtained results were comparable with those reported for acidic TiO2.
authors.affiliation: Centro de Investigación en Materiales Avanzados, S.C., Miguel de Cervantes 120, Complejo Ind. Chihuahua, Chihuahua, Chih 31109, Mexico.
authors.forename: O
authors.initials: O
authors.lastname: Chimal-Valencia
authors.forename: A
authors.initials: A
authors.lastname: Robau-Sánchez
authors.forename: V
authors.initials: V
authors.lastname: Collins-Martínez
authors.forename: A
authors.initials: A
authors.lastname: Aguilar-Elguézabal
mesh_terms: D000081008:Bicyclic Monoterpenes; D002384:Catalysis; D007474:Ion Exchange; D007475:Ion Exchange Resins / Q000737:chemistry*; D007536:Isomerism; D007700:Kinetics; D039821:Monoterpenes / Q000737:chemistry*; D013696:Temperature; D013729:Terpenes / Q000737:chemistry*; D013997:Time Factors
chemical_list: D000081008:Bicyclic Monoterpenes; D007475:Ion Exchange Resins; D039821:Monoterpenes; D013729:Terpenes; C019286:camphene; C005451:alpha-pinene