US 12,344,567 B2
Valorisation of potassium salts coproduced in fermentation processes
Jeremy Jean-Paul Pessiot, La Charite sur Loire (FR); Michael Fréderic Pierre Roussel, Clermont-Ferrand (FR); and Aurelien Antoine Bost, Clermont-Ferrand (FR)
Assigned to AFYREN, Saint-Beauzire (FR)
Filed by AFYREN, Saint-Beauzire (FR)
Filed on Sep. 22, 2022, as Appl. No. 17/950,404.
Application 17/950,404 is a division of application No. 16/205,983, filed on Nov. 30, 2018, granted, now 11,485,690.
Claims priority of application No. 1761410 (FR), filed on Nov. 30, 2017.
Prior Publication US 2023/0093037 A1, Mar. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C05D 1/00 (2006.01); C05F 5/00 (2006.01)
CPC C05D 1/005 (2013.01) [C05D 1/00 (2013.01); C05F 5/008 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A process for producing volatile organic acids from a biomass fermentation juice comprising potassium salts of said volatile organic acids, the process comprising the steps of:
a) fermentation of a biomass wherein the pH is controlled by addition of a base, the pH being between 5 to 9, to obtain a biomass fermentation broth;
b) separation of insoluble particles from the biomass fermentation broth of step a) to obtain a biomass fermentation juice;
c) addition of a strong acid to the fermentation juice of step b) until the pH is below 5 in order to form an acidified fermentation juice having a pH below 5 and to cause precipitation of a potassium salt mixture;
d) drying the acidified potassium salt mixture of step c) comprising the precipitated potassium salts and the acidified fermentation juice;
e) recovering evaporated organic acids by condensation of drying vapors of step d); and
f) recovering the dried potassium salts mixture of step d).