US 12,264,403 B2
Electrochemical system, apparatus and method to generate metal hydroxide in the presence of metal silicates
Gregory Hudson Rau, Castro Valley, CA (US); Sadaf Tahmasebi, Halifax (CA); Clive Mervyn Hugh Brereton, Richmond (CA); Alexandru Vasile Mezei, Peterborough (CA); and Michael John Kelland, Ottawa (CA)
Filed by Planetary Hydrogen Inc., Dartmouth (CA)
Filed on Apr. 28, 2021, as Appl. No. 17/243,499.
Claims priority of provisional application 63/017,230, filed on Apr. 29, 2020.
Prior Publication US 2021/0340681 A1, Nov. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C25B 9/23 (2021.01); B01D 53/62 (2006.01); C25B 1/02 (2006.01); C25B 1/20 (2006.01); C25B 1/50 (2021.01); C25B 9/21 (2021.01); C25B 9/65 (2021.01); C25B 15/08 (2006.01)
CPC C25B 9/23 (2021.01) [B01D 53/62 (2013.01); C25B 1/02 (2013.01); C25B 1/20 (2013.01); C25B 1/50 (2021.01); C25B 9/21 (2021.01); C25B 9/65 (2021.01); C25B 15/081 (2021.01); C25B 15/083 (2021.01); C25B 15/085 (2021.01); C25B 15/087 (2021.01); B01D 2257/302 (2013.01); B01D 2257/304 (2013.01); B01D 2257/402 (2013.01); B01D 2257/504 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of generating magnesium hydroxide, the method comprising:
(a) in an electrolytic container having an anode, a cathode, an electrolyte solution containing a monovalent metal salt dissolved in water, generating an acidic solution at the anode, and a metal hydroxide solution at the cathode, a metal in said metal hydroxide solution containing monovalent metal ions derived from the monovalent metal salt;
(b) in another container:
(b1) supplying the acidic solution removed at the anode;
(b2) supplying a metal silicate mass comprising 38% of magnesium oxide;
(b3) setting a mass ratio of the removed acidic solution and the metal silicate mass within a range from 2:1 to 6:1;
(b4) irrigating said metal silicate mass with the removed acidic solution at an irrigation rate from 0.08 to 0.4 liters per minute per square meter of the metal silicate mass to generate water and a metal salt solution comprising magnesium salt;
(c) in yet another container:
(c1) supplying the metal salt solution containing the magnesium salt of the step (b4);
(c2) supplying the metal hydroxide solution of the step (a) containing monovalent metal ions; and
(c3) reacting the metal salt solution with the metal hydroxide solution to produce a reaction mixture containing the electrolyte solution and the magnesium hydroxide; and
(d) separating the magnesium hydroxide from the electrolyte solution of the step (c3).