Removal of cyanide and color bodies from coke plant wastewater

Claim 1

A PROCESS FOR REMOVING CYANIDES AND COMPLES ORGANIC COMPOUNDS WHICH COLOR LIQUID WASTES FROM COKE OVEN WASTEWATERS, COMPRISING: A. MIXING HIGH CALCIUM LIME, THE WASTEWATER TO BE PURIFIED AND A MAJRO PORTION OF THE HIGH DENSITY SLUDGE FORMED IN STEP (E) IN A FIRST REACTOR FORMING A FIRST MIX HAVING A PH OF BETWEEN ABOUT 10.0 TO ABOUT 12.0, B. TRANSFERRING THE FIRST MIX FROM THE SAID FIRST REACTOR TO A SECOND REACTOR, C. MIXING A SOLUTION SELECTED FROM THE GROUP CONSISTING OF ACID MINE DRAINAGE AND WASTE PICKLE LIQUOR, WHICH SOLUTION CONTAINS IRON VALUES INTO THE FIRST MIX IN THE SECOND REACTOR TO FORM A SECOND MIX HAVING A PH OF BETWEEN ABOUT 9.0 TO ABOUT 10.0 AND PRECIPITATING A MAJOR PORTION OF THE CYANIDES AND COMPLEX ORGANIC COMPOUNDS ORIGINALLY PRESENT IN THE WASTEWATER BEING PURIFIED. D. FLOCCULATING THE PRECIPITATE FORMED IN STEP (C). E. PASSING THE SECOND MIX CONTAINING FLOCCULATED PRECIPITATE OF STEP (D) TO A SETTLING MEANS WHEREIN THE FLOCCULATED PRECIPITATE SETTLES OUT AS A HIGH DENSITY SLUDGE AND CLARIFIED WATER IS DECANTED FROM THE SETTLING MEANS, AND F. RECYCLING BACK TO THE FIRST REACTOR FROM ABOUT 20 POUNDS TO 40 POUNDS OF THE HIGH DENSITY SLUDGE FORMED IN STEP (E) FOR EVERY POUND OF NEW PRECIPITATE FORMED IN STEP (C).