Kinetic Modeling of Liquid Phase Alkylation of Guaiacol With Cyclohexene

CRISTINA PADRÓ; NICOLÁS M. BERTERO; MARÍA EUGENIA SAD; M. KATERYNE MONTAÑEZ V.

Puerto Vallarta

Congreso; XXVII Congreso Iberoamericano de Catálisis; 2020

FISOCat

The guaiacol alkylation with cyclohexene can produce cyclohexyl-2-methoxyphenylether (CHMPE) by O-alkylation or cyclohexyl-2-methoxyphenol isomers (CHMP) by C-alkylation. Furthermore, CHMPE can isomerize to CHMP. The C-alkylation products are important intermediaries for the production of resins, antioxidants, drugs, polymeric additives, agrochemicals, etc. In the present work, the kinetics modeling of guaiacol alkylation with cyclohexene on Amberlyst 36 resin was performed. Several kinetic expressions were modeling using Langmuir-Hinshelwood-Hougen-Watson (LHHW) type models and all the expressions were deeply analyzed and interpreted to propose a mechanism that explains the formation of C-alkylation products. The selected kinetic model predicts that the rate limiting steps for both the O-alkylation and C-alkylation was the surface chemical reaction between adsorbed G and adsorbed CH and that the O-alkylated product are converted into C-alkylated products by isomerization with the adsorption of the O-alkylated compound as the rate limiting step. This LHHW model excellently fit the experimental data, from both physical and statistical point of view.