Production of sulfate of ammonia

Claim 1

IN REMOVING AMMONIA FROM A STREAM OF COKE OVEN GAS FLOWING UPWARDLY THROUGH A SUBSTANTIALLY UNOBSTRUCTED SCRUBBING SPACE IN A SCRUBBER WHICH ENCLOSES SAID SPACE AND HAS A LOWER GAS INLET ABOUT THE LIQUID LEVEL AND ANN UPPER GAS OUTLET FROM SAID SPACE, THE METHOD WHICH CONSISTS IN SPRAYING AMMONIUM SULPHATE SOLUTION WITH ENTRAINED CRYSTALS CONTAINING SULPHURIC ACID INTO THE AMMONIA CONTAINING GAS IN SAID SCRUBBER SPACE SO THAT THE GAS ONLY ENCOUNTERS SPRAY OF AMMONIUM SULPHATE SOLUTION, SEPARATING SAID ENTRAINED SOLUTION BY PASSING THE GAS THROUGH A BAFFLE AFTER IT IS PASSES THROUGH THE SOLUTION SPRAY, SAID BAFFLE BEING WASHING BY HOT WATER AND AMMONIUM SULPHATE SOLUTION ALLOWING THE SOLUTION TO DESCEND AFTER CONTACT WITH THE GAS INTO A CRYSTAALLIZING BOTTOM PORTION OF SAID SPACE, WIHTDRAWING SOLUTION CONTAINING FINE CRYSTALS FROM THE UPPER PART OF SAID CRYSTAL-