Process for the removal and recovery of mineral pollutants from water

Abstract

Abstract THIS PATENT DESCRIBES A PROCESS FOR THE TREATMENT OF AN AQUEOUS STREAM CONTAINING IONIC POLLUTANTS TO REMOVE THE IONS FROM THE STREAM AND RECOVER THE IONS WHICH COMPRIESES: OPTIONALLY COUNTERCURRENTLY PASING SAID AQUEOUS STREAM THROUGH A BED OF MIXED ION EXCHANGE MATERIAL TO REMOVE IONIC POLLUTANTS FROM THE STREAM AND PRODUCE A SUBSTANTIALLY ION-FREE WATER, REMOVING SPENT MIXED ION EXCHANGE MATERIAL FROM SAID BED AND SEPARATING THE SAME INTO ANIONIC AND CATIONIC ION EXCHANGE MATERIAL, REMOVING THE IONIC POLLUTANTS FROM THE SEPARATED SPENT ANIONIC AND CATIONIC ION EXCHANGE MATERIAL WITH ANIONIC AND CATIONIC REGENERANT STREAMS TO REGENERATE THE ANIONIC AND CATIONIC ION EXCHANGE MATERIAL AND TO FORM SPENT ANIONIC AND CATIONIC REGENERANTSTREAMS, RETURING THE REGENERATED ANIONIC AND CATIONIC EXCHANGE MATERIAL TO SAID BED, TREATING SAID SPENT CATIONIC REGENERANT STREAM WITH A METAL PRECIPITANT TO FORM PRECIPITATED METAL CARBONATES AND RECOVER THE CATIONIC REGENERANT STREAM FOR RECYCLE TO SAID SPENT CTIONIC ION EXCHANGE MATERIAL, AND CONTACTING SAID SPENT ANIONIC REGENERANT STREAM WITH SAID PRECIPITATED METAL CARBONATES AT ELEVATED TEMPERATURES TO PRECIPITATE METAL SALTS AND RECOVER METAL PRECIPITANT FOR RECYCLE TO SAID SPENT CATIONIC REGENERANT STREAM AND ANIONIC COMPLEXING AGENTS FOR RECYCLE TO SAID SPENT ANIONIC ION EXCHANGE MATERIAL.

Inventors

• 👤 David O De Pree

Bibliographic Details