US 11,834,385 B2
Method for producing N-methyl-p-toluidine for use as an additive for aviation gasoline
Martina Gerdinand, Bergisch Gladbach (DE); Rainer Dost, Langenfeld (DE); Ralf Krahwinkel, Langenfeld (DE); Hans-Jurgen Quella, Leverkusen (DE); Daniel Ullrich, Langenfeld (DE); and Patrick Kurr, Monchengladbach (DE)
Assigned to LANXESS Corporation, Pittsburgh, PA (US)
Filed by LANXESS Corporation, Pittsburgh, PA (US)
Filed on May 28, 2020, as Appl. No. 16/885,853.
Application 16/885,853 is a continuation of application No. 16/473,289, granted, now 10,875,823, previously published as PCT/EP2017/083582, filed on Dec. 19, 2017.
Claims priority of application No. 17150428 (EP), filed on Jan. 5, 2017.
Prior Publication US 2020/0290947 A1, Sep. 17, 2020
Int. Cl. B01J 23/72 (2006.01); B01J 35/02 (2006.01); B01J 37/02 (2006.01); B01J 37/03 (2006.01); B01J 37/04 (2006.01); B01J 37/06 (2006.01); C07C 209/18 (2006.01); C07C 211/48 (2006.01)
CPC C07C 209/18 (2013.01) [B01J 23/72 (2013.01); B01J 35/023 (2013.01); B01J 37/0236 (2013.01); B01J 37/031 (2013.01); B01J 37/04 (2013.01); B01J 37/06 (2013.01); C07C 211/48 (2013.01); C07C 2523/72 (2013.01)] 2 Claims
 
1. A method for producing a catalyst containing Cu, Zn and Al, comprising: adding an aqueous sodium carbonate solution and a mixture of aqueous copper nitrate and zinc nitrate solution to an aqueous suspension of aluminum oxide, while maintaining a pH of 7.5-8.5, at a temperature of 60-80° C., wherein the mixture of aqueous copper nitrate and zinc nitrate solution is adjusted before the addition to a pH of <1, the resulting suspension containing Cu, Zn and Al is subsequently washed, then dried, the solid obtained therefrom is calcined.