Hydroxylation of phenol over ts-2, a titanium silicate molecular sieve |
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| Affiliation: | 1. University of Michigan—Dearborn, 19000 Hubbard Dr. Dearborn, MI 48126, United States;2. University of Ontario Institute of Technology, Faculty of Business and Information Technology, 2000 Simcoe Street North, Oshawa, ON L1H 7K4 Canada;1. Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, 110629, Liaoning, PR China;2. Beijing Key Laboratory of Ionic Liquids Clean Process, Key Laboratory of Green Process and Engineering, Chinese Academy of Sciences, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, PR China;3. Public Technology Center, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences (CAS), Ningbo, 315201, PR China;4. School of Chemical Engineering, Dalian University of Technology, Dalian, 110624, Liaoning, PR China |
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| Abstract: | The influence of different process parameters on the hydroxylation of phenol with H2O2 over the titanium silicate molecular sieve TS-2 has been investigated. Apart from the primary products vis., p- and o-dihydroxybenzenes, the corresponding quinones are also formed. Higher Ti contents in the catalyst (TS-2) and higher catalyst concentrations lower the formation of the secondary oxidation products. Solvents have an influence on the relative amounts of the two dihydroxybenzenes in the product. H2O2 efficiency of up to 74% is obtainable at ∼ 28% phenol conversion to dihydroxybenzenes. |
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