US 11,999,680 B2
Enhanced conversion of taurine to alkyl taurate amide using phosphoric acid catalysts
Erin Whitfield Dunn, San Francisco, CA (US); Bijan Harichian, Irvine, CA (US); Anat Shiloach, Trumbull, CT (US); and John Robert Winters, Dumont, NJ (US)
Assigned to CONOPCO, INC., Englewood Cliffs, NJ (US)
Appl. No. 17/047,089
Filed by Conopco, Inc., Trumbull, CT (US)
PCT Filed Apr. 5, 2019, PCT No. PCT/EP2019/058706
§ 371(c)(1), (2) Date Oct. 13, 2020,
PCT Pub. No. WO2019/206607, PCT Pub. Date Oct. 31, 2019.
Claims priority of application No. 18169068 (EP), filed on Apr. 24, 2018.
Prior Publication US 2021/0163405 A1, Jun. 3, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 303/22 (2006.01); B01J 27/16 (2006.01); C07C 309/15 (2006.01)
CPC C07C 303/22 (2013.01) [B01J 27/16 (2013.01); C07C 309/15 (2013.01); C07C 2527/173 (2013.01)] 7 Claims
 
1. A process for making an N-alkyl taurate amide comprising reacting a C8 to C20 fatty acid with an alkali metal salt of an N-alkyl taurine, wherein:
a) the molar ratio of the fatty acid to alkali metal salt is 1.5:1 to 10:1;
b) a reaction temperature is from 180° C. to 250° C.;
c) a catalyst is used in an amount of 0.1 to 0.7 wt %, based on the active weight of the catalyst in the total weight of the reaction mixture;
d) a reaction time is 1 to 10 hours; and
e) the catalyst is phosphoric acid.