Abstract: Method of performing alkylation or acylation reactions of aromatic substrates under supercritical or near-critical reaction conditions. In particular, a method of performing Friedel-Crafts alkylation or acylation reactions is disclosed under those conditions. Friedel-Crafts reactions may be effected using a heterogeneous catalyst in a continuous flow reactor containing a super-critical or near-critical reaction medium. Selectivity of product formation can be achieved by varying one or more of the temperature, pressure, catalyst, flow rates and also by varying the ratios of aromatic substrate to acylating or alkylating agent.
Type:
Grant
Filed:
August 24, 2001
Date of Patent:
October 7, 2003
Assignee:
Thomas Swan & Co. Limited
Inventors:
Martyn Poliakoff, Thomas M. Swan, Thomas Tacke, Martin G. Hitzler, Stephen K. Ross, Stefan Wieland, Fiona Ruth Smail
Abstract: In a process for the hydroformylation of alkanes, alkenes or trialkylboranes under supercritical or near-critical conditions, hydroformylation is effected using a heterogeneous catalyst in a continuous flow reactor containing a supercritical or near-critical reaction medium. Selectivity of product formation may be achieved by independently varying one of more of the temperature, pressure, catalyst, mole ratios of hydrogen and carbon monoxide and flow rate.
Type:
Grant
Filed:
March 12, 2001
Date of Patent:
May 20, 2003
Assignee:
Thomas Swan & Co., Limited
Inventors:
Martyn Poliakoff, Nicola J. Meehan, Stephen K. Ross, Stefan Wieland, Stefan Roeder
Abstract: A process for the alkylation of aromatic substrates under supercritical or near-critical reaction conditions is described. In particular, a method for performing Friedel-Crafts alkylation reactions is disclosed under those conditions. Friedel-Crafts reactions may be effected using a heterogeneous catalyst in a continuous flow reactor containing a supercritical or near-critical reaction medium. Selectivity of product formation can be achieved by varying one or more of temperature, pressure, catalyst, flow rates and also by varying the ratios of aromatic substrate to alkylating agent.
Type:
Grant
Filed:
June 18, 1999
Date of Patent:
October 16, 2001
Assignee:
Thomas Swan & Co., Limited
Inventors:
Martyn Poliakoff, Thomas M. Swan, Thomas Tacke, Martin G. Hitzler, Stephen K. Ross, Stefan Wieland, Fiona Ruth Smail