Abstract: A method of recovering boric acid from a subterranean deposit of colemanite ore by solution mining, comprises:supplying a leach solution comprising hydrochloric acid to the subterranean deposit via an injection well in communication therewith, whereby colemanite ore is dissolved and an aqueous pregnant solution of boric acid and calcium chloride is formed in the deposit;withdrawing the pregnant solution of boric acid and calcium chloride from said deposit via a production well in communication therewith;separating boric acid from the withdrawn solution;adding sulfuric acid to the resultant concentrated solution from which boric acid has been separated, whereby hydrochloric acid is regenerated therein and CaSO.sub.4.2H.sub.2 O is formed;separating CaSO.sub.4.2H.sub.2 O from the resultant solution containing regenerated hydrochloric acid thereby forming a regenerated leach solution; andrecycling the regenerated leach solution to the subterranean deposit of colemanite via an injection well.

Abstract: In an electrolysis system capable of producing particulate crystalline product having limited adherence to the cathodes, a process and apparatus for the continuous recovery of said product directly from the electrolytic cell tank substantially uncontaminated by adhering electrolyte comprising the agitation of the electrolyte to effectively influence and contribute to the control of the crystalline product size and density as well as the structural competence of the dendrites and to cause said product to separate from the cathodes, the collection of the particulate crystalline product on a conveyor transport system located in the bottom part of the electrolytic cell tank, the continuous removal of the particulate crystalline product from the electrolytic cell tank by means of the conveyor transport system, and the transportation of the crystalline particulate product through a washing zone prior to its removal from the electrolytic cell tank to substantially displace the electrolyte liquor from the particulate