Manufacture of sulfuric acid

Claim 1

THE PROCESS OF MANUFACTURING SULFURIC ACID WHICH INCLUDES THE STEPS OF CONTACTING A GAS STREAM COMPRISING WATER VAPOR AND SULFUR TRIOXIDE WITH A LIQUID STREAM OF AN AQUEOUS SULFRIC ACID IN AN ABSORBING ZONE, THE EXIT LIQUID ACID FROM THE ABSORBING ZONE BEING HEATED BY SAID ABSORPTION TO A TEMPERATURE ABOVE 150* C., COOLING SAID EXIT LIQUID ACID BY PASSING THROUGH A SEPARATE ACID-COOLING ZONE WHEREIN THE ACID IS COLLED SOLELY BY CONTACT WITH AN INERT GAS AND WHEREIN SEVERAL MOLS OF INERT GAS ARE HEATED FOR EACH MOL OF WATER AND ACID COLLED, WITHDRAWING PRODUCT ACID FROM THE ACID COOLED BY SAID INERT GAS, RECOVERING ENTRAINED SULFURIC ACID FROM THE HEATED INERT GAS IN A CLEANING ZONE BY CONTACTING SAID HEATED INERT GAS WITH AN AQUEOUS SULFURIC ACID AND DISSIPATING ALL OF THE HEAT OF THE ENTIRE OPERATION AS INERT GASES CONTAINING WATER VAPOR WITHOUT THE USE OF A LIQUID FUNCTIONING PRIMARILY TO COOL ANOTHER LIQUID.