Acid recovery from acid-rich solutions
AssigneeMelodea Ltd.
InventorsShaul LAPIDOT, Clarite AZERRAF, Inbar KREMER
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Abstract
The invention provides a unique, efficient and cost-effective process for the recovery of acid from acid-rich solutions. The process of the invention utilizes a strong oxidizer, such as Caro's acid, to disintegrate or render insoluble organic or inorganic materials such as carbohydrates and complexes thereof contained in acid-rich solutions, to make efficient and simple the separation and recovery of the acid solution. The acid recovered thus obtained is free of organic matter, and containing nearly all of the acid originally contained in the acid-rich solution.
Claims18
-40. (canceled)
A process for acid recovery from an acid-rich aqueous solution, the solution comprising at least one organic material, the process comprising:
- treating said solution with Caro's acid or with at least one precursor thereof for enabling in situ formation of Caro's acid in the solution, wherein the organic material contained in the solution is transformed into at least one insoluble or gaseous species;
- removing or allowing separation of said insoluble or gaseous species from the acid solution;
- to yield a substantially enriched acid solution being substantially free of organic matter.
A process for recovery of sulfuric acid from an aqueous solution rich in sulfuric acid, the solution further comprising at least one organic material, the process comprising:
- treating said solution with Caro's acid or with hydrogen peroxide, to transform the organic material contained in the solution into at least one insoluble or gaseous species;
- removing or allowing separation of said insoluble or gaseous species from the acid solution;
- to yield a substantially enriched acid solution being substantially free of organic matter.
Dependencies are inferred from the claim text.