Journal
PETROLEUM CHEMISTRY
Volume 62, Issue 10, Pages 1195-1203Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0965544122100012
Keywords
guaiacol; isopropanol; cyclohexanol; alkylation; heterogeneous catalysis
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Funding
- Russian Science Foundation [20-19-00380]
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This paper investigates the alkylation of guaiacol with isopropanol and cyclohexanol over sulfonated porous aromatic frameworks. The results show that the composition of alkylate is sensitive to the reaction conditions and catalyst structure.
This paper reports on an investigation of the alkylation of guaiacol with isopropanol and cyclohexanol over sulfonated porous aromatic frameworks, designated as PAF-20-SO3H and PAF-30-SO3H. The catalyst structures were characterized by infrared spectroscopy and low-temperature nitrogen adsorption; the elemental composition and acidity were measured by CHNS analysis and potentiometric titration. The alkylate composition was found to be sensitive to the reaction conditions and catalyst structure. PAF-30-SO3H was demonstrated to achieve 58% guaiacol conversion over 2 h of alkylation with cyclohexanol at 250 & DEG;C and 3 MPa, with the reaction products mostly consisting of benzene ring monoalkylation products. In guaiacol alkylation with isopropanol, the product composition depends on the catalyst structure: after 6 h of reaction, the benzene ring monoalkylation products prevailed (accounting for up to 23% of the total product) in the case of PAF-20-SO3H, whereas PAF-30-SO3H promoted the yield of a mixture of monoalkylates (up to 34%) and dialkylates (up to 35%).
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