Catalyst development for the selective methylation of catechol

Gas-phase alkylation of catechol with methanol on g-alumina and modified g-alumina catalysts is studied exptl. By limiting the conversion of X < 0.3, the formation of polymethylated species can be avoided and only the three isomers guaiacol, 3-methylcatechol and 4-methylcatechol are obsd. Optimizing the catalyst compn. and the reaction conditions, a selectivity of 0.75 for the industrially most valuable product 3-methylcatechol can be obtained. [on SciFinder (R)]


Published in:
Chemical Engineering Science, 51, 11, 2933-2938
Year:
1996
Keywords:
Note:
CAN 125:85943
22-4
Physical Organic Chemistry
Institut de Genie Chemique,Ecole Polytechnique Federale de Lausanne,Lausanne,Switz.
Journal
0009-2509
written in English.
22537-21-9 (Boron ion(3+) Role: CAT (Catalyst use), USES (Uses) (boron ion/g-alumina catalysts for selective gas-phase methylation of catechol); 16984-48-8 (Fluoride) Role: CAT (Catalyst use), USES (Uses) (fluoride ion/g-alumina catalysts for selective gas-phase methylation of catechol); 22537-22-0 (Magnesium ion(2+) Role: CAT (Catalyst use), USES (Uses) (magnesium ion/g-alumina catalysts for selective gas-phase methylation of catechol); 90-05-1P (Guaiacol); 452-86-8P (4-Methylcatechol) Role: BYP (Byproduct), PREP (Preparation) (selective gas-phase methylation of catechol on g-alumina and modified g-alumina catalysts); 488-17-5P (3-Methylcatechol) Role: SPN (Synthetic preparation), PREP (Preparation) (selective gas-phase methylation of catechol on g-alumina and modified g-alumina catalysts); 120-80-9 (Catechol) Role: RCT (Reactant), RACT (Reactant or reagent) (selective gas-phase methylation of catechol with methanol on g-alumina and modified g-alumina catalysts); 1344-28-1 (g-Alumina) Role: CAT (Catalyst use), USES (Uses) (g-; selective gas-phase methylation of catechol on g-alumina and modified g-alumina catalysts)
Laboratories:




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