Development of environmental benign solid catalysts for the selective alkylation of aromatics
Vapor-phase alkylation of aroms. over environmentally benign solid catalysts is a valuable alternative to the conventional alkylation carried out traditionally over mineral acids and Friedel-Crafts type catalysts. Two examples for the development of new, simple, non-corrosive and environmentally safe processes of the selective methylation were reported: (1) the selective (80%) formation of 4,4'-dimethylbiphenyl over H-ZSM-5 zeolite, and (2) the prodn. of 3-methylcatechol over g-alumina modified with Mg2+ and Li+. Mechanistic considerations for the alkylation reactions were discussed. [on SciFinder (R)]
1999
1
1, Novel Chemical Reaction Engineering for Cleaner Technologies
29
33
CAN 132:323712
51-11
Fossil Fuels, Derivatives, and Related Products
Institute of Chemical Engineering,Swiss Federal Institute of Technology,Lausanne,Switz.
Journal
written in English.
1309-48-4 (Magnesium oxide); 12057-24-8 (Lithium oxide) Role: CAT (Catalyst use), USES (Uses) (alumina modified with; vapor-phase selective alkylation of arom. hydrocarbons over environmentally benign solid acid catalysts); 92-52-4 (1,1'-Biphenyl); 120-80-9 (Catechol) Role: RCT (Reactant), RACT (Reactant or reagent) (methylation of; vapor-phase selective alkylation of arom. hydrocarbons over environmentally benign solid acid catalysts); 1344-28-1 (Alumina) Role: CAT (Catalyst use), USES (Uses) (modified with Mg2+ and Li+, catalysts; vapor-phase selective alkylation of arom. hydrocarbons over environmentally benign solid acid catalysts); 488-17-5P (3-Methylcatechol); 613-33-2P (4,4'-Dimethylbiphenyl) Role: FMU (Formation, unclassified), IMF (Industrial manufacture), FORM (Formation, nonpreparative), PREP (Preparation) (selective formation of; vapor-phase selective alkylation of arom. hydrocarbons over environmentally benign solid acid catalysts)
EPFL