Ion-exchange-regenerant recovery

Claim 1

ION EXCHANGE APPARATUS COMPRISING A BED OF MIXED ANION AND CATION EXCHANGE MATERIALS; A REGENERANT SOLUTION RESERVOIR CONNECTING THROUGH FLOW CONTROL MEANS TO AN INFLUENT CONNECTION AT ONE END OF SAID BED; A WASH LIQUID RESERVIOR CONNECTING THROUGH FLOW CONTROL MEANS TO AN INFLUENT CONNECTION AT THE SAME END OF SAID BED; INFLUENT MEANS FOR THE SOLUTION TO BE TREATED CONNECTING THROUGH FLOW CONTROL MEANS TO THE OTHER END OF SAID BED; A WASTE EFFLUENT CONDUIT CONNECTING WITH THE END OF THE BED OPPOSITE THE INFLUENT CONNECTIONS FOR THE REGENERANT SOLUTION RESERVOIR AND WASH LIQUID RESERVOIR; A PRODUCT EFFLUENT CONDUIT CONNECTING WITH THE END OF THE BED OPPOSITE THE INFLUENT MEANS FOR THE SOLUTION TO BE TREATED, A WASTE-REGENERANT RECOVERY STILL FOR SEPARATING A THERMOLYTIC REGENERANT FROM EFFLUENT LIQUIDS AND HAVING EFFLUENT LIQUID INLET MEANS CONNECTING WITH THE SAID WASTE EFFLUENT CONDUIT, REGENERANT-FREE WASTE LIQUID OUTLET MEANS, AND RECOVERED REGENERANT OUTLET MEANS; A PRODUCT-REGENERANT RECOVERY STILL FOR SEPARATING A THERMOLYTIC REGENERANT FROM EFFLUENT LIQUIDS AND HAVING EFFLUENT LIQUID INLET MEANS CONNECTING WITH SAID PRODUCT EFFLUENT CONDUIT, REGENERANT-FREE PRODUCT LIQUID OUTLETMEANS, AND RECOVERED REGENERANT OUTLET MEANS; A WASH LIQUID CONDUIT LEADING TO SAID WASH LIQUID RESERVOIR AND CONNECTING THROUGH FLOW CONTROL MEANS WITH SAID WASTE EFFLUENT CONDUIT AND ALSO CONNECTING THROUGH FLOW CONTROL MEANS TO THE REGENERANTFREE LIQUID OUTLET OF SAID PRODUCT-REGENERATED RECOVERY STILL, A REGENERANT MAKEUP CONDUIT LEADING TO SAID REGENERANT SOLUTION RESERVIOR CONNECTING THROUGH THE FLOW CONTROL MEANS WITH SAID PRODUCT EFFLUENT CONDUIT; AND CONVEYING MEANS LEADING TO SAID REGENERANT SOLUTION RESERVIOR FROM THE RECOVERED REGENERANT MEANS OF SAID WASTE AND PRODUCT-REGENERANT RECOVERY STILLS, WHEREBY RECOVERED REGENERANT MAY BE CONVEYED TO SAID REGENERANT RESEVOIR.