US 12,252,408 B2
Scalable method for preparing crystalline borosulfate materials
Brian L. Chaloux, Alexandria, VA (US); James A. Ridenour, Arlington, VA (US); and Albert Epshteyn, Potomac, MD (US)
Assigned to The Government of the United States of America, as represented by the Secretary of the Navy, Arlington, VA (US)
Filed by The Government of the United States of America, as represented by the Secretary of the Navy, Arlington, VA (US)
Filed on Jan. 13, 2023, as Appl. No. 18/096,602.
Claims priority of provisional application 63/307,839, filed on Feb. 8, 2022.
Prior Publication US 2023/0249978 A1, Aug. 10, 2023
Int. Cl. C01B 35/12 (2006.01)
CPC C01B 35/12 (2013.01) 6 Claims
OG exemplary drawing
 
1. A method of preparing borosulfate materials, the method comprising:
providing in a reaction vessel a solution of B(OH)3 in concentrated sulfuric acid at 5% to 15% by weight;
adding a cation source thereto; and then
heating the solution to 100-250° C. under dynamic vacuum while in connection with a receiving vessel comprising a desiccant and separate from the reaction vessel,
thereby causing formation of a borosulfate material in the reaction vessel while eliminated water is collected in the receiving vessel.