Catalytic process for the selective alkylation of polycyclic aromatic compounds

US5900519A · kind A · utility

Assignee

• Soliton, LLC · US

Inventors

• Patrick Notté · Wavre, BE
• Georges Poncelet · Beauvechain, BE
• Marc Joseph Henri Remy · Louvain-la-Neuve, BE
• Pierre Fernand Marcel Ghislain Lapdinois · Binche, BE
• Marina Jeanne Madeleine Van Hoecke · Brussels, BE

Key dates

• Filing date: Oct 28, 1996
• Grant date: May 4, 1999
• Expiry date: Oct 28, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2529/18
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A catalytic process is described for the selective alkylation of a polycyclic aromatic compound comprising reacting the polycyclic aromatic compound with an alkylating agent in the presence of a catalyst to thereby yield the desired alkyl substituted polycyclic aromatic compound with improved selectivity and improved yield. The process is particularly suitable for the selective dialkylation of polycyclic aromatic compounds in the para-, respectively beta-positions. The catalyst is a protonic form of a mordenite having an atomic Si/Al ratio of at least 5:1, comprising additional metal species in a molar ratio metal (in the metal species)/aluminium of at least 0.10 and having a biphenyl sorption of at least 0.05 g biphenyl per g of catalyst.