KINETIC MODELING OF LIQUID PHASE ALKYLATION OF GUAIACOL WITH CYCLOHEXENE

NICOLÁS BERTERO; MARDELLY KATERYNE MONTAÑEZ-VALENCIA; CRISTINA LILIANA PADRÓ; MARÍA EUGENIA SAD

Congreso; XXVII CONGRESO IBEROAMERICANO DE CATÁLISIS; 2020

The guaiacol alkylationwith cyclohexene canproduce cyclohexyl-2-methoxyphenylether(CHMPE) by O-alkylation or cyclohexyl-2-methoxyphenol isomers (CHMP) byC-alkylation. Furthermore,CHMPE can isomerize to CHMP. The C-alkylation products areimportant intermediaries for the production of resins, antioxidants, drugs,polymeric additives, agrochemicals, etc. In the present work, the kinetics modeling ofguaiacol alkylation with cyclohexene on Amberlyst36 resin was performed. Several kineticexpressions were modeling using Langmuir-Hinshelwood-Hougen-Watson (LHHW) type models and all the expressions were deeplyanalyzed and interpreted to propose a mechanism that explains the formation ofC-alkylation products. The selected kinetic model predicts that the rate limiting steps for both theO-alkylation and C-alkylation was the surface chemical reaction betweenadsorbed G and adsorbed CHand thatthe O-alkylatedproduct are converted into C-alkylated products by isomerization with theadsorption of theO-alkylated compound as therate limiting step. This LHHW model excellentlyfit theexperimental data, from both physical and statistical point of view.